Caledonian Medium Voltage Cables

Company Profile
Caledonian develops, manufactures and markets a totally integrated product line of Medium Voltage
Cables for a diverse variety of technological applications.

The company offers an unrivalled experience and vast product range developed organically at the leading
edge of technology. It manufactures a variety of products, which include medium voltage power cables,
low voltage power and control cables, instrumentation cables, pilot cables, building wires & flexible cables.
It can also offer cables with special features like flame retardant properties, low smoke & halogen free
(LSZH) properties, cables with anti-termite treatment, UV resistant outer sheath, etc, being suitable for
different types of applications or environmental conditions.

Caledonian holds several important international approvals and manufactures its products in accordance
with relevant IEC, VDE, CENELEC and British Standard. The quality management system is accredited to
ISO 9001.

Caledonian has maintained an enviable growth record year on

year. The products manufactured by Caledonian are sold not
only in Europe by also beyond to Australia, China, Japan, South
Korea, Arab countries. They have been installed in variety of
applications including power plants, oil refineries, petroleum & gas
facilities, hospitals, hotels, airports etc.

This catalogue contains technical information on all medium

voltage cables including armoured and unarmoured designs,
single and multicore constructions and different sheathing and
screening options. All cable designs outlined in this section
follow the constructions covered by IEC 60502, BS 6622 and
VDE 0276. However, Caledonian can also supply a range of
alternative designs to meet specific customer needs including
different sheathing, screening, armouring and sheath color
options, together with enhanced fire performance, water sealing
of conductors and screens, and added environmental protection.
Cables can be made to individual customer specifications or other
recognized standards. These standards include ICEA S-66-524
WC 7, AS 1429, JIS C 3606, EDF HN 33-S-23, ASTM etc.
Table Of Contents
I II III IV V

Cable Properties & Construction 03

Cable Machinery & Equipments 05

I
Product Testing 06

Cable Options & Ordering Information 09

Medium Voltage Cables to BS 6622 12

II Single Core Cables To BS 6622 ~
Three Core Cables To BS 6622 30

Medium Voltage Cables to IEC 60502 31

III Single Core Cables To IEC 60502 ~
Three Core Cables To IEC 60502 59

Medium Voltage Cables to VDE 0276 60

IV Single Core Cables To VDE 0276 ~
Three Core Cables To VDE 0276 86

V Technical Information 87
Caledonian
Medium Voltage
Cables

I II
I III
Cable Properties & Construction
IV V

Cable Machinery & Equipments

Product Testing

Cable Options & Ordering Information

 Cable Properties & Construction

▓▓ Cable Properties

Special features which we can offer for MV cables:

ÌÌ Ì Watertight construction (both radial and longitudinal).

ÌÌ Ì Lead sheath available for options.
ÌÌ Ì Resistant to heavy vibration.
ÌÌ Ì Available in long delivery lengths to reduce number of joints.
ÌÌ Ì Corrosion-free screen area.
ÌÌ Ì Copper or aluminum conductor up to 2000 mm².
ÌÌ Ì Metallic sheath and radial moisture barrier made of copper wire or tape.
ÌÌ Ì Different options for outer PE jackets (LDPE, MDPE & HDPE).
ÌÌ Ì Different options for LSF, LSOH & FRPVC, being anti-termite or UV resistant as per
BS 7835, IEC 60332 etc.
ÌÌ Ì Strippable insulation screen.
ÌÌ Ì Metallic screen made of multiple layers of copper tapes or a combination of copper
wires and tapes to increase the earth fault current carrying capacity.
ÌÌ Ì Increased armour conductivity by insertion of hard drawn copper wires in armour.

▓▓ Cable Construction

Caledonian medium voltage cables are manufactured using the monosil process. Caledonian
provides the highly specialized plant, state-of-the-art research facilities and meticulous quality
control procedures that are required for the manufacturing of PVC insulated cables for use up
to 6KV and XLPE/EPR insulated cables for use at voltages up to 42 KV. The materials are all
kept in cleanliness-controlled conditions throughout the production process in order to ensure
the absolute homogeneity of the finished insulation materials.

Conductors
Either aluminium or copper conductors are used. Conductors up to 800mm² will be circular,
compacted & stranded and shall comply with IEC 60228 class 2. 1000mm² conductor will be
circular stranded type on which a layer of semi-conducting tape will be applied.

Conductor Screen
This will be an extruded layer of semi-conducting crosslinkable compound applied under
simultaneous triple extrusion process over the conductor along with the insulation and the
insulation screen. The triple extrusion is a single high precision operation that eliminates the
possibility of any contamination between the layers which could create irregularities in the
electrical field. By careful material selection and special attention to process parameters,
Caledonian produces the insulation screen layers with the required degree of stripping force
as stipulated by the applicable national or international standard.

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 Caledonian Medium Voltage Cables
Insulation
This will be an extruded layer of XLPE or EPR applied over conductor screen under triple
extrusion process along with conductor screen and insulation screen. PVC may be used for
1.8/3KV and 3.6/6KV cables.

Insulation Screen
This will be a layer of semi-conducting crosslinkable compound which will be applied by triple
extrusion process over the insulation.

Metallic Screen
It will consist of a layer of copper tape applied helically with overlap over insulation screen.
Other combinations of metallic screens as per customer’s requirement can also be provided
on request.

Laying-Up
In case of three core cables, the three cores are laid up with non-hygroscopic fillers like
polypropylene(PP) fillers at interstices and a binder tape is applied with an overlap. These
binder tapes can be of PVC or foamed Polyethylene.

Inner Sheath (Bedding) for Armoured Cables

Extruded layer of PVC or PE is applied over the laid up cores for armoured cables. PVC is
normally of grade ST2 and PE of grade ST7 as per IEC 60502 Part 2.

Armouring
In case of armoured cables, the armour is applied helically over inner sheath. For single core
cables, it is of aluminium wires and for multicore cables, the armour can be of one among the
following options:
a) Galvanized steel wire.
b) Galvanized steel tape.
c) Galvanized steel strip.

Oversheath
An extruded layer is applied over the armour in case of armoured cables and over laid up
cores in case of unarmoured cables. Outer sheath material can be either PVC, PE, HDPE or
MDPE. Caledonian medium voltage cables are normally supplied with red PVC oversheaths
complying with BS 6622 or IEC 60502. Other colors may be provided to suit a range of
installation considerations such as the effect of UV radiations and differing soil compositions.
Anti-termite formulations can also be supplied in addition to graphite-coated oversheaths
where on-site testing of the sheath is required.

Fire Performance on Cable Sheaths

Cables can also be supplied with special flame retardant PVC oversheaths to comply
with the IEC 60332 standard. We can also supply cables with Low Smoke Halogen
Free (LSZH)  sheaths according to BS 7211 and BS 6724 standards or other equivalent
 Cable Properties & Construction
international standards.

▓▓ Cable Machinery & Equipments

The MV cable manufacturing facility at Caledonian is the most modern facility available
today with the state of the art machinery & equipments. The entire MV cables manufacturing
plant at Caledonian is fully air-conditioned with humidity control to ensure contamination free
atmosphere. The heart of MV cable manufacturing facility is the CCV line. This line supplied
by Troester, Germany and which incorporates some of the most modern features like,
-- Triple extrusion head to ensure superior quality of extrusion and uniform bonding of
conductor screen, XLPE insulation and the insulation screen.
-- CDCC – Completely dry curing & cooling in an inert atmosphere of nitrogen.
-- In line X-ray machine for checking proper concentricity as well as measuring thickness
of extruded materials.
-- Fully computerized auto-cure control system, which controls all driving parameters to
achieve best curing of extruded materials.
-- Fully automatic compound handling system in a positive pressure atmosphere ensuring
a contamination free line, which is absolutely essential to achieve superior quality
product.

Some of the other machines include:

-- Drawing machine from Niehoff, Germany
-- Cable stranding machine from Mali, Austria
-- Screening machine from Ceeco, Canada
-- Five drum cabling machine from Mali, Austria
-- Armouring machine from Ceeco, Canada
-- Extruder from Troester, Germany, etc.

With the manufacturing facilities incorporating the use of latest available technology, the MV
cables offered by Caledonian provides customers with a definite advantage in terms of:
-- Compete adherence to specifications,
-- Superior overall performance,
-- Minimum risk of insulation failures,
-- Longer service life,
-- Triple head extrusion.

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 Caledonian Medium Voltage Cables

▓▓ Product Testing

Caledonian has made major investment in the testing facilities for its MV cables factory. We
have equipped ourselves with the latest and most advanced cable testing facility available in
the world.
Our major testing facilities include:
a) DC withstand voltage test system from Hipotronics USA.
b) Partial discharge test system from Haefely, Switzerland.
c) HV test system from Haefely, Switzerland.
d) On line conductor resistance meter from Aesa, Switzerland
Effective quality assurance procedures are essential to ensure the consistency and long term
reliability and performance of all products. Caledonian always recognises the importance
of quality assurance and this commitment is reflected in the company achievement of ISO
9001  certification. The design validation for our MV Cables has been done at recognized
international laboratories.
With the above state of the art testing facility, we can conduct all type, routine as well as
special tests mentioned in IEC 60502 Part 2, BS 6622 & other international specifications, in-
house. While 100% of the cables are tested for routine tests prior to dispatch, however upon
customers’ request, other type/special tests can be carried out in house or by any third party
laboratory.

The tests can be divided into different categories:

Type Tests
The type test is conducted by KEMA, Netherlands to validate a special cable design type.
Electrical type tests include the following:
-- Partial discharge test (IEC 60502 clause 18.1.3)
-- Bending test (IEC 60502 clause18.1.4)
-- Sheath measurement (IEC 60502 clause 18.1.5)
-- Heating cycle test (IEC 60502 clause 18.1.6)
-- Impulse withstand test followed by a.c. voltage test (IEC 60502 18.1.7)
-- High voltage test for 4 hours (IEC 60502 clause 18.1.8)
-- Resistivity of semiconducting screens (IEC 60502 clause 18.1.9)
Nonelectrical type tests include the following:
-- All nonelectrical type tests as required by IEC 60502

Routine Tests
Routine tests are carried out on each finished length of cable to control the overall quality of
the cable. They comprise:
-- Measurement of dimensions.
-- Measurement of conductor resistance: the D.C. resistance of each conductor, when
corrected to 20°C and 1 Km, shall not exceed the appropriate maximum value specified
in IEC 60228 respectively.
 Cable Properties & Construction
-- Measurement of screen resistance.
-- High voltage test: an a.c. voltage of 3.5 Uo shall be applied for 5 min between each
conductor and metallic screen. No breakdown shall occur.
-- Partial discharge test: the magnitude of discharge at 1.73 Uo shall not exceed 10pC.
-- Measurement of dielectric losses and capacity.

Special Tests
Special tests are carried out on 10% of the lengths for each production lot, in any case on
one length. They are carried out if major changes in design are introduced.
They comprise:
-- Measurement of dimensions
-- Checking sheath identification
-- Testing shrinkage of PE sheath
-- Conductor examination
-- Carrying out voltage test
-- Carrying out hot set test for XLPE insulation

At Caledonian, quality assurance is an integrated part of the production process and

maintained from order entry and manufacture through to testing, packaging and shipping. All
quality assurance procedures are regularly audited by recognised quality organisations and
all routine voltage testing is carried to more stringent levels than that required by international
standards.

Specification for testing is designed in accordance to the following international standards:

-- IEC 60502
-- IEC 60811
-- BS 5368
-- DIN 56283/VDE 0273
-- EDF HN 33S23
-- AS&JIS
-- ASTM
-- etc.

We have also installed many in line devices/facilities for checking the product quality
during the manufacturing process like the X-ray machine installed in the CCV line, curing
optimization software, etc, to avoid any risk or failure & to ensure a long service life for
our products. With these modern equipment & facilities, we ensure to maintain close
manufacturing tolerances, high accuracy to customer specifications as well as effective
monitoring of the entire manufacturing process to offer a world class product.

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 Caledonian Medium Voltage Cables
The following In-Process testing is conducted during the cable manufacturing :

ÌÌ Ì Tandem Line
ÌÌ Ì Visual and physical tests
ÌÌ Ì Electrical tests
ÌÌ Ì Resistance & resistance unbalance tests
ÌÌ Ì Open & short circuit test

ÌÌ Ì High Voltage Test

ÌÌ Ì Group twinner
ÌÌ Ì Visual & physical tests
ÌÌ Ì Electrical tests
ÌÌ Ì Resistance & resistance unbalance tests
ÌÌ Ì Mutual capacitance test
ÌÌ Ì Open & short circuit test
ÌÌ Ì Insulation resistance test

ÌÌ Ì Sheathing
ÌÌ Ì Dimensional test
ÌÌ Ì Water penetration test
ÌÌ Ì Spark test
ÌÌ Ì Overlaps & seal bonding inspection

ÌÌ Ì Armoring
ÌÌ Ì Dimensional test
ÌÌ Ì Visual inspection

ÌÌ Ì Jacketing
ÌÌ Ì Dimensional test
ÌÌ Ì Overlap inspection
ÌÌ Ì Spark test

ÌÌ Ì Final Testing
ÌÌ Ì Routine testing
ÌÌ Ì Resistance & resistance unbalance tests
ÌÌ Ì Mutual capacitance test
ÌÌ Ì Transmission test
ÌÌ Ì Capacitance & capacitance unbalance tests ( pair to pair and pair to ground )
ÌÌ Ì Attenuation & cross talk tests.
 Cable Properties & Construction

▓▓ Cable Options

It is essential that the type of cable ordered is suitable for its intended use. Cable choice
will be based on a whole range of factors including installation requirements, relevant local
regulations and the electrical characteristics of appropriate cable types. The factors to be
considered are:

ÌÌ Ì Nominal voltage of system.

ÌÌ Ì Highest voltage of system.
ÌÌ Ì Impulse withstand voltage.
ÌÌ Ì System frequency.
ÌÌ Ì Maximum rated current.
ÌÌ Ì For continous operation.
-- For cyclic operation ( a load curve is essential )
-- For overload operation, if any ( duration is essential )
ÌÌ Ì Symmetrical and asymmetrical short circuit current , both between pulses and to earth.
ÌÌ Ì Duration of fault in second.
ÌÌ Ì Required screen bonding scheme
-- Both ends bonded
-- Single point bonded
-- Cross bonded

▓▓ Ordering Informations

VDE CODE: ABCDEFGH

A. Conductor
N- Standard construction in accordance to VDE standard (copper conductor)
NA- Aluminium conductor
NFA- Standard construction for twisted cable (aluminium conductor)

B. Insulation Material
Y- PVC
2X- XLPE
3G- EPR

C. Concentric Conductor Shielding Material

C- Concentric conductors of copper wires and copper tape, helically wounded
CW- Concentric conductors of copper wires in waveconal formation and and copper tape,
helically wounded
CE- Concentric conductors of copper wires and copper tape over each individual conductor,
helically wounded
Blank- No screen

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 Caledonian Medium Voltage Cables

D.Shielding Material
S- Shielding of copper wires and copper tape, helically wounded
SE- Shielding of copper wires and copper tape over each individual conductor, helically
wounded
(F)- Longitudinally water proof shielding
Blank- No screen

E. Bedding Material
2Y- PE
Y- PVC
H- LSZH
K- Lead sheath
Blank- No bedding

F. Armoring Material
B- Double steel tape armouring
R- Round steel wire armouring
F- Flat steel wire armouring
Gb- Steel tape armouring
Blank- No armour

G. Jacket Material
2Y- PE
Y- PVC
H- LSZH
K- Lead sheath

H. Cable Types
J- Cables with green-yellow conductor are marked with protective conductor
O- Cables without green-yellow conductor are marked without protective conductor

Caledonian Order Code

MVA-BCDEFGH-IJ

A Cable Design Standard

6622- BS6622 standard
502- IEC60502 standard
276- VDE0276 standard

B Conductor
A- Aluminium conductor
Blank- Copper conductor
 Cable Properties & Construction
C Insulation Material
Y- PVC
2X-XLPE
3G-EPR

D Concentric Conductor Shielding Material

C- Concentric conductors of copper wires and copper tape, helically wounded
CW- Concentric conductors of copper wires in waveconal formation and and copper tape,
helically wounded
CE- Concentric conductors of copper wires and copper tape over each individual conductor,
helically wounded
Blank- No screen

E Shielding Material
S- Shielding of copper wires and copper tape, helically wounded
SE- Shielding of copper wires and copper tape over each individual conductor, helically
wounded
(F)- Longitudinally water proof shielding
Blank- No screen

F Bedding Material
2Y- PE
Y- PVC
H- LSZH
K- Lead sheath
Blank- No bedding

G Armoring Material
B- Double steel tape armouring
R- Round steel wire armouring
F- Flat steel wire armouring
Gb- Steel tape armouring
Blank- No armour

H Jacket Material
2Y- PE
Y- PVC
H- LSZH
K- Lead Sheath

I No of Cores
3C- 3 Cores

J Conductor Size
185- 185 mm sq
8A- 8AWG

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Caledonian
Medium Voltage
Cables

I
IIII III
Medium Voltage Cables to BS 6622
IV V

Single Core Cables To BS 6622

Three Core Cables To BS 6622

 Medium Voltage Cables to BS 6622

Single Core Cables to BS 6622

▓▓ APPLICATIONS:
The single core cables are designed for distribution
of electrical power with nominal voltage Uo/U
ranging from 3.8/6.6KV to 19/33KV and frequency
50Hz. They are suitable for installation mostly
in power supply stations, indoors and in cable
ducts, outdoors, underground and in water as well
as for installation on cable trays for industries,
switchboards and power stations.

▓▓ STANDARD: PVC/PE/LSZH Oversheath

Aluminium Wire Armour (optional)
Binder
BS 6622 XLPE/EPR Insulation Screen
Conductor
BS 7835 (LSZH) Conductor Screen
Insulation Screen
Metallic Screen
PVC/PE/LSZH Separation Sheath (optional)

▓▓ CONSTRUCTION:

Conductor: Plain annealed copper or aluminium complying with IEC 60228/BS 6360. Copper
conductors shall be stranded (class 2) and aluminium conductors shall be either solid or
stranded (class 2).
Conductor Screen: Extruded layer of semi-conducting cross-linkable compound is applied
over the conductor and shall cover the surface completely. The minimum thickness is 0.3mm
and the maximum resistivity shall not exceed 500 Ohm-m at 90°C.
Insulation: Insulation is of cross-linked polyethylene compound XLPE (GP8) conforming to
BS 7655-1.3 or EPR (GP7), conforming to BS 7655-1.2.

Table 1. Insulation Thickness

Nom. Cross Insulation Thickness at Nominal Voltage
Section Area 3.8/6.6KV (Um=7.2KV) 6.35/11KV (Um=12KV) 8.7/15KV(Um=17.5KV) 12.7/22KV(Um=24KV) 19/33KV(Um=36KV)
mm² mm mm mm mm mm
70 – 185 2.5 3.4 4.5 5.5 8.0
240 2.6 3.4 4.5 5.5 8.0
300 2.8 3.4 4.5 5.5 8.0
400 3.0 3.4 4.5 5.5 8.0
Above 500 3.2 3.4 4.5 5.5 8.0

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 Caledonian Medium Voltage Cables
Insulaton Screen: Extruded layer of semi-conducting cross-linkable compound is applied
over the insulation. The extruded semi-conducting layer shall consist of bonded or cold
strippable semi-conducting compound capable of removal for jointing or terminating. As an
option, a semi- conducting tape may be applied over the extruded semi-conducting layer as a
bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity
is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and
can be easily hand stripped on site.
Metallic Layer: The metallic layer shall consist of either copper tapes or a concentric layer
of copper wires or a combination of tapes and wires. The metallic layer provides an earth
fault current path, capable of withstanding fault current to earth of 1000A for one second at
maximum temperature 160°C. Copper wires are applied over the conducting water blocking
layer with a minimum diameter of 0.5mm. And over the copper wires, copper tape with
minimum thickness of 0.1mm can be applied helically with overlap. Total cross section of
copper wire screen layer is shown in table 2.

Table 2. Minimum Total Cross Section of Copper Wire Screen & DC Resistance of the screen
Nominal Cross-Section Minimum Cross-Section DC Resistance of the Copper Wire Screen
of Cables of Copper Wire Screen at 20°C

mm² mm² Ω
up to 120 16 1.06
150-300 25 0.72
400-630 35 0.51

Separation Sheath (for armoured cable): The separation sheath comprises a layer of
extruded PVC, PE or LSZH. The nominal thickness is calculated by 0.02Du + 0.6mm where
Du is the fictitious diameter under the sheath in mm. The nominal separation sheath thickness
shall not be less than 1.2mm.
Armour (for armoured cable): The armour consists of round aluminium wire with diameter
specified as in Table 3.

Table 3. Armour Wire Diameter

Fictitious Diameter Under the Armour Armour Wire Diameter
mm mm
> <
25 1.6
25 35 2.0
35 60 2.5
60 - 3.15

Over Sheath: Overall sheath comprises a layer of extruded either PVC type 9 conforming
to BS 7665-4.2 or MDPE type TS2 conforming to BS 7655-10.1. LSZH can be offered as an
option. The oversheath is normally black in colour. When a DC voltage test is to be performed
on the oversheath, a semi-conducting layer such as graphite coating shall be applied over
the surface of the extruded oversheath. The nominal oversheath thickness is calculated
 Medium Voltage Cables to BS 6622
by 0.035+D where D is the diameter immediately under the oversheath in mm. For cables
with the oversheath not applied over the armour, the nominal oversheath thickness shall not
be less than 1.4mm. And for cables with oversheath applied over the armour, the nominal
oversheath thickness shall not be less than 1.8mm.

▓▓ PHYSICAL PROPERTIES:

Operating Temperature: up to 90°C

Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds)
Bending Radius: 12 x OD

Table 4. Nominal /Operating /Test Voltages

Rated Voltage Uo/U Operating Voltage (Um) Testing Voltage (rms)
3.8/6.6KV 7.2KV 15KV
6.35/11KV 12KV 25.5KV
8.7/15KV 17.5KV 35KV
12.7/22KV 24KV 51KV
19/33KV 36KV 76KV

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 Caledonian Medium Voltage Cables

Single Core 3.8/6.6KV (Um=7.2KV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Copper Nom. Approx.
Nom. Nom. Approx. Nom. Nom. Approx.
Section Insulation Wire Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Thickness Screen Thickness Diameter Screen
Thickness
Wire
Thickness Diameter
Area Cu AL Area Diameter Cu AL
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg / km
25 2.5 16 1.5 20.3 750 580 3.4 1.2 1.6 1.8 26.3 1150 1000
35 2.5 16 1.6 21.3 870 650 3.6 1.2 1.6 1.8 27.3 1250 1050
50 2.5 16 1.6 22.4 1090 770 3.9 1.2 1.6 1.8 28.4 1500 1190
70 2.5 16 1.7 24.2 1310 870 4.3 1.2 1.6 1.8 30.0 1740 1300
95 2.5 16 1.7 25.8 1560 960 4.7 1.2 1.6 1.9 31.8 2030 1430
120 2.5 16 1.8 27.4 1830 1070 5.0 1.2 1.6 1.9 33.2 2310 1550
150 2.5 25 1.8 29.1 2130 1190 5.3 1.2 1.6 2.0 35.1 2660 1720
185 2.5 25 1.9 30.8 2490 1320 5.8 1.2 2.0 2.0 37.4 3120 1950
240 2.6 25 1.9 33.5 3040 1520 6.3 1.2 2.0 2.1 40.3 3740 2200
300 2.8 25 2.0 36.1 3650 1770 7.0 1.2 2.0 2.2 42.9 4400 2520
400 3.0 35 2.2 40.6 4680 2170 7.7 1.2 2.0 2.3 47.2 5490 2960
500 3.2 35 2.3 43.6 5670 2570 8.5 1.3 2.5 2.5 51.6 6760 3660
630 3.2 35 2.4 48.8 6980 2990 9.5 1.4 2.5 2.6 57.0 8200 4160

Electrical Data
Aluminium
Unarmoured Wire
Cables Armoured
Cables
Nom.
Short
Cross- Short Reactance Inductance Impedance
Circuit Short Circuit
Section Circuit
DC AC Rating of Rating of
Area Rating of Capaci- Charging
Resistance Resistance Copper Copper Tape Trefoil Flat Spaced
Conductor tance Current Flat Flat
CU / AL CU / AL Wire Screen Trefoil Trefoil
CU / AL spaced Spaced
Screen 1 sec
1 sec Cu AL Cu AL
1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m µΩ/m nH/m nH/m µΩ/ m µΩ/m
25 727/1200 927/1538 3.6/2.3 263 0.32 2.6 0.4 136 194 400 590 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 291 0.35 2.6 0.5 127 185 390 580 679 1121 695 1131
50 387/641 494/822 6.8/4.4 321 0.39 2.6 0.5 121 179 380 570 511 834 527 844
70 268/443 343/568 9.8/6.3 371 0.45 2.6 0.6 115 173 370 550 364 583 386 597
95 193/320 248/410 13.3/8.5 417 0.50 2.6 0.6 110 168 350 540 272 427 300 446
120 153/253 196/325 17.2/11.0 459 0.55 2.6 0.7 107 165 340 520 225 345 257 367
150 124/206 159/265 21.2/13.5 494 0.59 4.3 0.7 103 161 330 510 193 287 229 313
185 99.1/164 128/211 26.6/17.0 543 0.65 4.3 0.8 100 158 320 500 165 237 206 267
240 75.4/125 98/161 34.9/22.3 583 0.70 4.3 0.9 97 155 310 490 140 191 185 226
300 60.1/100 80/130 43.8/28.0 602 0.72 4.3 1.0 95 153 300 490 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 627 0.75 5.8 1.1 92 150 290 480 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 654 0.79 5.8 1.2 90 149 290 470 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 726 0.87 5.8 1.3 87 145 280 460 97 110 151 160
 Medium Voltage Cables to BS 6622

Single Core 6.35/11KV (Um=12KV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Copper Nom. Approx.
Nom. Nom. Approx. Nom. Nom. Approx.
Section Insulation Wire Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Thickness Screen Thickness Diameter Screen
Thickness
Wire
Thickness Diameter
Area Cu AL Area Diameter Cu AL
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg/km
25 3.4 16 1.5 22.1 960 740 3.8 1.2 1.6 1.8 28.1 1300 780
35 3.4 16 1.6 23.3 1060 790 4.1 1.2 1.6 1.8 29.1 1400 1180
50 3.4 16 1.7 24.4 1160 840 4.4 1.2 1.6 1.8 30.2 1600 1280
70 3.4 16 1.7 26.0 1370 930 4.7 1.2 1.6 1.9 32.0 1840 1400
95 3.4 16 1.8 27.8 1640 1040 5.2 1.2 1.6 1.9 33.6 2130 1530
120 3.4 16 1.8 29.2 1900 1140 5.5 1.2 1.6 2.0 35.2 2430 1670
150 3.4 25 1.9 31.1 2220 1280 5.8 1.2 1.6 2.1 37.9 2870 1930
185 3.4 25 1.9 32.6 2570 1410 6.2 1.2 2.0 2.1 39.4 3240 2080
240 3.4 25 2.0 35.3 3130 1610 6.8 1.2 2.0 2.2 42.1 3490 2330
300 3.4 25 2.1 37.5 3730 1850 7.3 1.2 2.0 2.2 44.1 4490 2560
400 3.4 35 2.2 41.4 4730 2200 8.0 1.2 2.0 2.4 48.2 5589 3040
500 3.4 35 2.3 44.0 5700 2600 8.6 1.3 2.5 2.5 52.0 6780 3680
630 3.4 35 2.4 49.2 7010 3020 9.5 1.4 2.5 2.6 57.4 8230 4200

Electrical Data
Aluminium
Unarmoured Wire
Cables Armoured
Cables
Nom.
Short
Cross- Short Reactance Inductance Impedance
Short Circuit Circuit
Section Circuit
DC AC Charging Rating of Rating of
Area Rating of Capaci-
Resistance Resistance Current Copper Copper Trefoil Flat Spaced
Conductor tance Flat Flat
CU / AL CU / AL Wire Screen Tape Trefoil Trefoil
CU / AL Spaced Spaced
1 sec Screen
1 sec Cu AL Cu AL
1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m µΩ/m nH/m nH/m µΩ/m µΩ/m
25 727/1200 927/1538 3.6/2.3 208 0.42 2.6 0.5 146 206 440 640 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 229 0.46 2.6 0.6 138 201 440 640 679 1121 695 1131
50 387/641 494/822 6.8/4.4 252 0.50 2.6 0.6 132 195 420 620 511 834 527 844
70 268/443 343/568 9.8/6.3 288 0.58 2.6 0.7 122 188 390 600 364 583 386 597
95 193/320 248/410 13.3/8.5 323 0.65 2.6 0.7 122 182 390 580 272 427 300 446
120 153/253 196//325 17.2/11.0 353 0.71 2.6 0.8 116 172 370 550 225 345 257 367
150 124/206 159/265 21.2/13.5 380 0.76 4.3 0.8 110 166 350 530 193 287 229 313
185 99.1/164 128/211 26.6/17.0 416 0.83 4.3 0.9 107 166 340 530 165 237 206 267
240 75.4/125 98/161 34.9/22.3 460 0.92 4.3 0.9 104 163 330 520 140 191 185 226
300 60.1/100 80/130 43.8/28.0 506 1.01 4.3 1.0 100 157 320 500 126 163 174 203
400 47/77.8 64/102 57.3/36.6 561 1.12 5.8 1.1 94 154 300 490 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 619 1.24 5.8 1.2 91 151 290 480 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 698 1.37 5.8 1.3 91 148 290 470 97 110 151 160

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 Caledonian Medium Voltage Cables

Single Core 8.7/15KV (Um=17.5kV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Copper Nom. Approx.
Nom. Nom. Approx. Approx. Nom. Nom. Approx.
Section Insulation Wire Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Thickness Screen Thickness Diameter Screen
Thickness
Wire
Thickness Diameter
Area CU AL Area Diameter CU AL
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg/km
25 4.5 16 1.6 23.7 940 820 4.4 1.2 1.6 1.8 30.3 1430 1210
35 4.5 16 1.7 24.9 1140 870 4.7 1.2 1.6 1.9 31.5 1630 1310
50 4.5 16 1.7 26.6 1240 920 4.9 1.2 1.6 1.9 32.6 1730 1410
70 4.5 16 1.8 28.4 1470 1030 5.3 1.2 1.6 1.9 34.2 1970 1520
95 4.5 16 1.9 30.2 1750 1160 5.7 1.2 2.0 2.0 36.8 2370 1770
120 4.5 16 1.9 31.6 2100 1250 6.1 1.2 2.0 2.1 38.4 2670 1910
150 4.5 25 2.0 33.5 2340 1400 6.4 1.2 2.0 2.1 40.1 3020 2080
185 4.5 25 2.0 35.0 2690 1520 6.8 1.2 2.0 2.2 41.8 3420 2240
240 4.5 25 2.1 36.8 3270 1740 7.4 1.2 2.0 2.3 44.5 4050 2500
300 4.5 25 2.2 39.9 3870 1990 7.9 1.2 2.0 2.3 46.5 4680 2780
400 4.5 35 2.3 43.8 4890 2370 8.5 1.3 2.5 2.5 51.8 5970 3430
500 4.5 35 2.4 46.4 5860 2760 9.2 1.3 2.5 2.6 54.4 7010 3910
630 4.5 35 2.5 51.6 7190 3190 10.0 1.4 2.5 2.7 59.8 8480 4420

Electrical Data
Aluminium
Unarmoured Wire
Cables Armoured
Cables
Nom.
Short
Cross- Short Short Reactance Inductance Impedance
Circuit
Section Circuit Circuit
DC AC Capac- Rating of
Area Rating of Charging Rating of
Resistance Resistance itance Copper Trefoil Flat Spaced
Conductor Current Copper Wire Flat Flat
CU / AL CU / AL Tape Trefoil Trefoil
CU / AL Screen Spaced Spaced
Screen
1 sec 1 sec CU AL CU AL
1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m µΩ/m nH/m nH/m µΩ/m µΩ/m
25 727/1200 927/1538 3.6/2.3 171 0.47 2.6 0.6 154 217 480 680 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 187 0.51 2.6 0.6 145 208 460 660 679 1121 695 1131
50 387/641 494/822 6.8/4.4 204 0.56 2.6 0.7 138 201 440 640 511 834 527 844
70 268/443 343/568 9.8/6.3 232 0.63 2.6 0.7 132 188 420 600 364 583 386 597
95 193/320 248/410 13.3/8.5 258 0.70 2.6 0.8 126 182 400 580 272 427 300 446
120 153/253 196/325 17.2/11.0 281 0.77 2.6 0.8 119 179 380 570 225 345 257 367
150 124/206 159/265 21.2/13.5 301 0.82 4.3 0.9 113 176 360 560 193 287 229 313
185 99.1/164 128/211 26.6/17.0 329 0.90 4.3 0.9 110 170 350 540 165 237 206 267
240 75.4/125 98/161 34.9/22.3 363 0.99 4.3 1.0 107 166 340 530 140 191 185 226
300 60.1/100 80/130 43.8/28.0 398 1.09 4.3 1.1 104 160 330 510 126 163 174 203
400 47/77.8 64/102 57.3/36.6 439 1.20 5.8 1.2 97 157 310 500 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 483 1.32 5.8 1.3 94 154 300 490 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 534 1.46 5.8 1.4 91 151 290 480 97 110 151 160
 Medium Voltage Cables to BS 6622

Single Core 12.7/22KV (Um=24kV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Copper Nom. Approx.
Nom. Nom. Approx. Nom. Nom. Approx.
Section Insulation Wire Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Thickness Screen Thickness Diameter Screen
Thickness
Wire
Thickness Diameter
Area CU AL Area Diameter CU AL
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg/km
35 5.5 16 1.7 27.4 1100 800 5.2 1.2 1.6 1.9 31.4 1400 1200
50 5.5 16 1.8 28.8 1330 1010 5.4 1.2 1.6 2.0 34.8 1850 1540
70 5.5 16 1.9 30.6 1570 1130 5.9 1.2 2.0 2.0 37.2 2190 1750
95 5.5 16 1.9 32.2 1840 1240 6.2 1.2 2.0 2.1 39.0 2510 1900
120 5.5 16 2.0 33.8 2120 1360 6.6 1.2 2.0 2.1 40.4 2810 2040
150 5.5 25 2.0 35.5 2440 1500 6.9 1.2 2.0 2.2 42.3 3180 2240
185 5.5 25 2.1 37.2 2810 1640 7.4 1.2 2.0 2.2 43.8 3560 2380
240 5.5 25 2.2 39.9 3390 1860 7.8 1.2 2.0 2.3 46.5 4200 2640
300 5.5 25 2.2 41.9 3990 2110 8.4 1.3 2.5 2.4 49.9 5030 3130
400 5.5 35 2.3 45.8 5100 2490 9.0 1.3 2.5 2.5 53.8 6140 3600
500 5.5 35 2.4 48.4 6000 2900 9.7 1.4 2.5 2.6 56.6 7210 4100
630 5.5 35 2.5 53.6 7340 3340 10.4 1.4 2.5 2.8 62.0 8700 4650

Electrical Data
Aluminium
Unarmoured Wire
Cables Armoured
Cables

Nom.
Cross- Short
Short Short
Section Circuit Reactance Inductance Impedance
Circuit Circuit
Area DC AC Rating of
Rating of Capaci- Charging Rating of
Resistance Resistance Copper
Conductor tance Current Copper Wire
CU / AL CU / AL Tape
CU / AL Screen
Screen
1 sec 1 sec
1 sec Flat Flat Trefoil Flat Spaced
Trefoil Trefoil
Spaced Spaced
CU AL CU AL
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m µΩ/m nH/m nH/m µΩ/m µΩ/m
35 524/868 668/1113 5.0/3.2 162 0.7 2.6 0.7 147 207 470 620 679 1121 695 1131
50 387/641 494/822 6.8/4.4 177 0.8 2.6 0.8 141 201 450 640 511 834 527 844
70 268/443 343/568 9.8/6.3 200 0.8 2.6 0.8 135 195 430 620 364 583 386 597
95 193/320 248/410 13.3/8.5 222 0.9 2.6 0.9 129 188 410 600 272 427 300 446
120 153/253 196/325 17.2/11.0 241 0.9 2.6 0.9 122 182 390 580 225 345 257 367
150 124/206 159/265 21.2/13.5 257 1.0 4.3 1.0 116 176 370 560 193 287 229 313
185 99.1/164 128/211 26.6/17.0 280 1.0 4.3 1.0 116 173 370 550 165 237 206 267
240 75.4/125 98/161 34.9/22.3 307 1.1 4.3 1.1 110 170 350 540 140 191 185 226
300 60.1/100 80/130 43.8/28.0 336 1.2 4.3 1.2 107 166 340 530 126 163 174 203
400 470/77.8 64/102 57.3/36.6 370 1.3 5.8 1.3 100 160 320 510 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 406 1.4 5.8 1.4 97 154 310 490 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 449 1.5 5.8 1.5 94 151 300 480 97 110 151 160

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 Caledonian Medium Voltage Cables

Single Core 19/33KV (Um=36kV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Copper Nom. Approx.
Nom. Nom. Approx. Nom. Nom. Approx.
Section Insulation Wire Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Thickness Screen Thickness Diameter Screen
Thickness
Wire
Thickness Diameter
Area CU AL Area Diameter CU AL
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg/km
50 8.0 16 2.0 34.2 1580 1270 6.7 1.2 2.0 2.2 41.0 2300 1980
70 8.0 16 2.0 35.8 1820 1380 7.1 1.2 2.0 2.2 42.6 2560 2120
95 8.0 16 2.1 37.6 2120 1510 7.5 1.2 2.0 2.3 44.4 2890 2290
120 8.0 16 2.1 39.0 2400 1630 7.9 1.2 2.0 2.3 45.8 3200 2430
150 8.0 25 2.2 40.9 2740 1810 8.2 1.3 2.5 2.4 48.9 3760 2830
185 8.0 25 2.2 42.4 3110 1950 8.6 1.3 2.5 2.5 50.6 4180 3010
240 8.0 25 2.3 45.1 3720 2180 9.2 1.3 2.5 2.5 53.1 4830 3270
300 8.0 25 2.4 47.3 4350 2460 9.7 1.4 2.5 2.6 55.5 5540 3630
400 8.0 35 2.5 51.2 5410 2880 10.3 1.4 2.5 2.7 59.4 6680 4130
500 8.0 35 2.6 53.8 6420 3320 11.0 1.5 2.5 2.8 62.2 7790 4690
630 8.0 35 2.7 59.0 7800 3780 11.8 1.5 2.5 2.9 67.4 9290 5220

Electrical Data
Aluminium
Unarmoured Wire
Cables Armoured
Cables
Nom.
Short Short
Cross- Short Reactance Inductance Impedance
Circuit Circuit
Section Circuit
DC AC Rating of Rating of
Area Rating of Capaci- Charging
Resistance Resistance Copper Copper Trefoil Flat Spaced
Conductor tance Current Flat Flat
CU / AL CU / AL Wire Tape Trefoil Trefoil
CU / AL Spaced Spaced
Screen Screen
1 sec CU AL CU AL
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m µΩ/m nH/m nH/m µΩ/m µΩ/m
50 387/641 494/822 6.8/4.4 138 0.83 2.6 1.0 151 214 480 680 511 834 527 844
70 268/443 343/568 9.8/6.3 154 0.92 2.6 1.0 144 201 460 640 364 583 386 597
95 193/320 248/410 13.3/8.5 169 1.01 2.6 1.1 138 195 440 620 272 427 300 446
120 153/253 196/325 17.2/11.0 183 1.10 2.6 1.1 132 188 420 600 225 345 257 367
150 124/206 159/265 21.2/13.5 194 1.16 4.3 1.2 126 182 400 580 193 287 229 313
185 99.1/164 128/211 26.6/17.0 210 1.26 4.3 1.2 122 182 390 580 165 237 206 267
240 75.4/125 98/161 34.9/22.3 229 1.37 4.3 1.3 119 176 380 560 140 191 185 226
300 60.1/100 80/130 43.8/28.0 249 1.49 4.3 1.4 113 173 360 550 126 163 174 203
400 47/77.8 64/102 57.3/36.6 273 1.64 5.8 1.5 107 163 340 520 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 298 1.79 5.8 1.6 104 163 330 520 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 327 1.96 5.8 1.7 100 160 320 510 97 110 151 160
 Medium Voltage Cables to BS 6622

Current Rating for 3.8/6.6KV (Um=7.2KV), 6.35/11KV (Um=12KV) & 8.7/15KV (Um=17.5KV)
Ground Duct Air
Nom.
Cross- Trefoil Flat Spaced Trefoil Flat Touching Trefoil Flat Spaced
Section Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d
Area
CU AL CU AL CU AL CU AL CU AL CU AL
mm² A A A A A A
25 160/160 120/120 170/170 125/125 165/165 125/125 165/165 125/125 170/170 130/130 230/235 180/180
35 180/180 150/150 190/190 155/15 185/185 155/155 185/185 155/155 200/200 160/160 260/265 210/210
50 220/220 170/170 230/230 175/175 225/220 175/170 220/220 170/170 235/250 180/195 295/300 230/230
70 270/270 210.210 280/280 215/215 270/260 215/210 270/270 210/210 285/310 225/240 370/370 290/290
95 320/320 250/250 335/335 260/260 320/305 255/245 325/325 250/250 360/375 280/295 455/460 350/355
120 360/360 280/280 380/380 295/295 360/340 285/275 370/370 285/285 415/430 320/355 520/530 410/410
150 410/410 320/315 430/430 330/330 400/375 315/300 415/410 320/320 470/490 365/380 600/600 465/465
185 460/455 360/355 485/485 375/375 440/410 350/335 465/460 360/360 540/550 425/435 690/690 530/530
240 530/520 415/405 560/560 440/440 505/460 405/380 540/540 420/420 640/650 500/510 820/820 640/630
300 600/580 475/455 640/640 495/495 560/500 455/420 610/610 475/470 740/740 580/580 940/940 730/730
400 680/650 540/510 730/730 570/570 610/530 510/455 690/690 540/540 840/840 670/670 1100/1100 860/860
500 750/710 610/570 830/830 650/650 680/570 570/500 790/780 620/620 940/930 790/770 1280/1280 1010/1010
630 830/760 680/640 940/940 750/750 750/620 640/550 890/890 710/700 1110/1040 910/880 1500/1480 1190/1180

Current Rating for 12.7/22KV (Um=24KV)

Ground Duct Air
Nom.
Cross- Trefoil Flat Spaced Trefoil Flat Touching Trefoil Flat Spaced
Section Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d
Area
CU AL CU AL CU AL CU AL CU AL CU AL
mm² A A A A A A
35 180/180 130/130 200/200 135/135 180/170 130/125 180/175 130/125 190/175 145/135 225/230 175/175
50 220/220 170/170 230/230 175/175 225/210 175/170 225/220 175/170 245/260 190/200 295/300 230/230
70 270/270 210.210 280/280 215/215 270/260 210/205 270/270 210/210 300/320 235/245 365/370 285/285
95 320/320 250/245 335/335 260/260 320/300 250/245 320/325 250/250 360/380 280/295 450/450 345/350
120 360/360 280/280 380/380 295/295 360/340 280/275 365/365 285/285 425/440 330/340 520/520 400/400
150 410/410 320/310 430/430 330/330 405/370 320/300 410/410 320/315 485/490 375/385 590/590 455/455
185 460/450 360/350 485/485 375/375 445/400 350/335 460/460 360/360 550/560 430/440 670/670 520/520
240 530/510 415/405 560/560 440/440 520/450 415/380 530/530 415/415 650/650 510/510 800/800 620/620
300 600/570 475/450 640/640 495/495 570/490 460/415 600/600 470/470 740/730 580/580 920/910 710/710
400 690/640 550/510 730/730 570/570 630/530 520/460 690/680 540/530 850/830 680/670 1070/1060 840/830
500 760/700 610/570 830/830 650/650 700/570 570/510 780/770 610/610 980/940 790/770 1250/1230 980/970
630 850/760 690/640 950/940 750/750 780/610 650/560 890/880 700/700 1130/1050 920/880 1450/1430 1060/1140

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 Caledonian Medium Voltage Cables

Current Rating for 19/33KV (Um=36KV)

Ground Duct Air
Nom.
Cross- Trefoil Flat Spaced Trefoil Flat Touching Trefoil Flat Spaced
Section Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d Unarm’d/Arm’d
Area
CU AL CU AL CU AL CU AL CU AL CU AL
mm² A A A A A A
50 220/220 170/170 230/230 175/175 225/220 175/170 225/220 175/170 245/260 190/200 295/300 230/230
70 270/270 210.210 280/280 215/215 270/260 210/205 270/270 210/210 300/320 235/245 365/370 285/285
95 320/320 250/245 335/335 260/260 320/300 250/245 320/325 250/250 360/380 280/295 450/450 345/350
120 360/360 280/280 380/380 295/295 360/340 280/275 365/365 285/285 425/440 330/340 520/520 400/400
150 410/410 320/310 430/430 330/330 405/370 320/300 410/410 320/315 485/490 375/385 590/590 455/455
185 460/450 360/350 485/485 375/375 445/400 350/335 460/460 360/360 550/560 430/440 670/670 520/520
240 530/510 415/405 560/560 440/440 520/450 415/380 530/530 415/415 650/650 510/510 800/800 620/620
300 600/570 475/450 640/640 495/495 570/490 460/415 600/600 470/470 740/730 580/580 920/910 710/710
400 690/640 550/510 730/730 570/570 630/530 520/460 690/680 540/530 850/830 680/670 1070/1060 840/830
500 760/700 610/570 830/830 650/650 700/570 570/510 780/770 610/610 980/940 790/770 1250/1230 980/970
630 850/760 690/640 940/940 750/750 780/610 650/560 890/880 700/700 1130/1050 920/880 1450/1430 1060/1140

▓▓ Current Rating Conditions:

Ground Temperature:20°C
Ambient Temperature (air): 30°C
Depth of Soil: 0.8m
Thermal Resistance of Soil: 1.5K•m/W
 Medium Voltage Cables to BS 6622

Three Core Cables to BS 6622

▓▓ APPLICATIONS:
The three core cables are designed for distribution
of electrical power with nominal voltage Uo/U
ranging from 3.6/6.6KV to 19/33KV and frequency
50Hz. They are suitable for installation mostly in
power supply stations, indoors and in cable ducts,
outdoors, underground and in water as well
as for installation on cable trays for industries,
switchboards and power stations.

▓▓ STANDARD: PVC/PE/LSZH Oversheath

PVC/PE/LSZH Separation Sheath(optional)
Metallic Screen
Insulation Screen
BS 6622
Insulation
Conductor
XLPE/EPR Screen
Binder
Armour(optional)

▓▓ CONSTRUCTION:

Conductor: Plain annealed copper or aluminium complying with IEC 60228/BS 6360. Copper
conductors shall be stranded (class 2) and aluminium conductors shall be either solid or
stranded (class 2).
Conductor Screen: Extruded layer of semi-conducting cross-linkable compound is applied
over the conductor and shall cover the surface completely. The minimum thickness is 0.3mm
and the maximum resistivity shall not exceed 500 Ohm-m at 90°C.
Insulation: Insulation is of cross-linked polyethylene compound XLPE (GP8) conforming to
BS 7655-1.3 or EPR (GP7), conforming to BS 7655-1.2.

Table 1. Insulation Thickness

Nom. Cross Insulation Thickness at Nom. Voltage
Section Area 3.8/6.6KV(Um=7.2KV) 6.35/11KV(Um=12KV) 8.7/15KV(Um=17.5KV) 12.7/22KV(Um=24KV) 19/33KV(Um=36KV)
mm² mm mm mm mm mm
70 – 185 2.5 3.4 4.5 5.5 8.0
240 2.6 3.4 4.5 5.5 8.0
300 2.8 3.4 4.5 5.5 8.0
400 3.0 3.4 4.5 5.5 8.0
Above 500 3.2 3.4 4.5 5.5 8.0

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 Caledonian Medium Voltage Cables
Insulaton Screen: Extruded layer of semi-conducting cross-linkable compound is applied
over the insulation. The extruded semi-conducting layer shall consist of bonded or cold
strippable semi-conducting compound capable of removal for jointing or terminating. As an
option, a semi -conducting tape may be applied over the extruded semi-conducting layer as a
bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity
is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and
can be easily hand stripped on site.
Inner Covering & Fillers: For cables with a collective metallic layer or cables with a metallic
layer over each individual cores with additional collective metallic layers, semi-conducting
inner covering and fillers shall be applied over the laid up cores. The inner covering is made
of non hygroscopic material, except if the cable is to be made longitudinally watertight. The
inner covering shall be extruded or lapped.
The approximate thickness of extruded inner coverings is given in Table 2:

Table 2. Approximate Thickness Of Extruded Inner Coverings

Ficititous Diameter Over Laid Up Cores Approx. Thickress of Extruded Inner Covering
mm mm
> <
35 45 1.0
25 35 1.2
35 45 1.4
45 60 1.6
60 80 1.8
80 - 2.0
*The approximate thickness of lapped inner coverings shall be 0.6mm.

Metallic Layer: The metallic layer shall be applied over each core or applied as a collective
screen. The metallic screen shall consist of either copper tapes or a concentric layer of
copper wires or a combination of tapes and wires. The metallic layer provides an earth
fault current path, capable of withstanding fault current to earth of 1000A for one second at
maximum temperature 160°C. Copper wires are applied over the conducting water blocking
layer with a minimum diameter of 0.5mm. And over the copper wires, copper tape with
minimum thickness of 0.1mm can be applied helically with overlap.
Total cross section of copper wire screen is shown in table 3.

Table 3. Minimum Total Cross Section Of Copper Wire Screen & DC Resistance Of The Screen
Nominal Cross-Section Minimum Cross-Section
DC Resistance of the Copper Wire Screen
Area of Cable of Copper Wire Screen Area

mm² mm² mm
up to 120 16 1.06
150-300 25 0.72
400-630 35 0.51

Separation Sheath (for armoured cable): The separation sheath comprises a layer of
extruded PVC, PE or LSZH. The nominal thickness is calculated by 0.02Du + 0.6mm where
 Medium Voltage Cables to BS 6622

Du is the fictitious diameter under the sheath in mm. The nominal separation sheath thickness
shall not be less than 1.2mm.
Armour (for armoured cable): The armour consists of galvanized steel wire applied over the
inner covering with diameter specified as in Table 4.

Table 4. Armour Wire Diameter

Fictitiious Diameter Under the Armour Armour Wire Diameter
mm mm
> <
25 1.6
25 35 2.0
35 60 2.5
60 - 3.15

Over Sheath: Overall sheath comprises a layer of extruded either PVC type 9 conforming
to BS 7665-4.2 or MDPE type TS2 conforming to BS 7655-10.1; LSZH can be offered as an
option. The oversheath is normally black in colour. When a DC voltage test is to be performed
on the oversheath, a semi-conducting layer such as graphite coating shall be applied over
the surface of the extruded oversheath. The nominal oversheath thickness is calculated
by 0.035+D where D is the diameter immediately under the oversheath in mm. For cables
with the oversheath not applied over the armour, the nominal oversheath thickness shall not
be less than 1.4mm. And for cables with oversheath applied over the armour, the nominal
oversheath thickness shall not be less than 1.8mm.

▓▓ PHYSICAL PROPERTIES:

Operating Temperature: up to 90°C

Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds)
Bending Radius: 15 x OD

Table 5. Nominal /Operating /Test Voltages

Rated Voltage Uo/U Operating Voltage (Um) Testing Voltage (rms)
3.8/6.6KV 7.2KV 15KV
6.35/11KV 12KV 25.5KV
8.7/15KV 17.5KV 35KV
12.7/22KV 24KV 51KV
19/33KV 36KV 76KV

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 Caledonian Medium Voltage Cables

Three Core 3.8/6.6KV (Um=7.2KV)

Dimensional Data
Unarmoured Cables Steel Wire Armoured Cables
Nom.
Cross- Copper Approx. Copper Nom. Approx.
Nom. Nom. Approx. Nom. Nom. Approx.
Section Insulation Tape Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Screen Screen Wire
Thickness Thickness Diameter Thickness Thickness Diameter CU AL
Area CU AL Area Diameter
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg / km
25 2.5 16 2.1 37.7 2205 1740 3.4 1.2 2.0 2.2 44.5 3890 3465
35 2.5 16 2.3 41.2 2690 2010 3.6 1.2 2.5 2.3 46.8 4420 3730
50 2.5 16 2.5 44.9 3340 2350 3.8 1.3 2.5 2.5 51.5 5640 4690
70 2.5 16 2.6 48.0 4050 2730 4.3 1.3 2.5 2.6 55.0 6570 5240
95 2.5 16 2.7 51.7 5000 3180 4.7 1.4 2.5 2.7 58.9 7760 5890
120 2.5 16 2.8 54.7 5890 3590 5.0 1.5 2.5 2.8 62.1 8810 6510
150 2.5 25 2.9 58.4 6960 4160 5.3 1.5 2.5 2.9 65.8 10110 7310
185 2.5 25 3.0 61.9 8160 4650 5.8 1.6 2.5 3.0 69.5 11520 7960
240 2.6 25 3.2 68.1 10210 5530 6.3 1.7 2.5 3.2 75.9 13920 9140
300 2.8 25 3.5 73.6 12380 6670 7.0 1.8 3.15 3.5 83.1 17400 11620
400 3.0 35 3.7 83.8 16190 8430 7.7 2.0 3.15 3.7 93.0 21900 13980

Electrical Data
Steel Wire
Unarmoured
Armoured Current Ratings
Cables
Cables
Nom. Short
Cross- Short Short Circuit Circuit
Ground Duct Air
Section Circuit Rating of Rating of
DC AC
Area Rating of Capaci- Charging Copper Wire Copper Reac- Induc-
Resistance Resistance
Conductor tance Current Screen Tape tance tance
CU / AL CU / AL
CU / AL Per Core Screen Per
CU AL CU AL CU AL
1 sec 1 sec Core
1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m A A A
25 727/1200 927/1538 3.6/2.3 272 0.33 2.6 0.4 113 370 140 115 125 95 145 115
35 524/868 668/1113 5.0/3.2 301 0.36 2.6 0.5 108 350 170 135 150 115 175 140
50 387/641 494/822 6.8/4.4 332 0.40 2.6 0.5 102 330 210 160 180 135 220 170
70 268/443 343/568 9.8/6.3 383 0.46 2.6 0.6 97 310 255 195 215 165 270 210
95 193/320 248/410 13.3/8.5 432 0.52 2.6 0.6 92 290 300 230 255 200 330 250
120 153/253 196/325 17.2/11.0 474 0.57 2.6 0.7 89 280 340 265 290 225 375 295
150 124/206 159/265 21.2/13.5 511 0.61 4.3 0.7 87 280 380 295 330 255 430 330
185 99.1/164 128/211 26.6/17.0 562 0.67 4.3 0.8 86 270 430 335 370 290 490 385
240 75.4/125 98/161 34.9/22.3 602 0.72 4.3 0.9 83 260 490 380 425 335 570 450
300 60.1/100 80/130 43.8/28.0 622 0.75 4.3 1.0 82 260 540 435 470 375 650 510
400 47.0/77.8 64/102 57.3/36.6 648 0.78 5.8 1.1 80 250 590 480 520 420 700 570
 Medium Voltage Cables to BS 6622

Three Core 6.35/11KV (Um=12KV)

Dimensional Data
Unarmoured Cables Steel Wire Armoured Cables
Nom.
Cross- Copper Approx. Copper Nom. Approx.
Nom. Nom. Approx. Nom. Nom. Approx.
Section Insulation Wire Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Thickness Screen Thickness Diameter Screen
Thickness
Wire
Thickness Diameter
Area Area Diameter
CU AL CU AL
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg / km
25 3.4 16 2.3 42.8 2600 2120 3.8 1.3 2.5 2.4 50.0 4930 4400
35 3.4 16 2.3 45.3 3000 2320 4.1 1.3 2.5 2.5 52.3 5380 4700
50 3.4 16 2.4 48.5 3630 2690 4.4 1.4 2.5 2.6 55.7 6210 5260
70 3.4 16 2.5 52.0 4440 3110 4.7 1.4 2.5 2.7 59.2 7200 5870
95 3.4 16 2.7 56.0 5440 3620 5.2 1.5 2.5 2.8 63.2 8420 6550
120 3.4 16 2.8 59.4 6370 4020 5.5 1.6 2.5 3.0 67.0 9580 7190
150 3.4 25 2.9 62.7 7430 4630 5.8 1.6 2.5 3.1 70.3 10830 8030
185 3.4 25 3.0 66.1 8680 5150 6.2 1.7 2.5 3.2 73.9 12290 8720
240 3.4 25 3.1 71.7 10690 5990 6.8 1.8 3.15 3.4 81.2 15620 10790
300 3.4 25 3.3 76.4 12770 7050 7.3 1.9 3.15 3.6 86.1 18030 12240
400 3.4 35 3.5 85.1 16460 8680 8.0 2.0 3.15 3.8 95.0 22350 14350

Electrical Data
Steel Wire
Unarmoured
Armoured Current Ratings
Cables
Cables
Nom. Short
Cross- Short Short Circuit Circuit
Ground Duct Air
Section Circuit Rating of Rating of
DC AC
Area Rating of Capaci- Charging Copper Wire Copper Reac- Induc-
Resistance Resistance
Conductor tance Current Screen Tape tance tance
CU / AL CU / AL
CU / AL Per Core Screen Per
CU AL CU AL CU AL
1 sec 1 sec Core
1 sec
mm² µ Ω/m µ Ω/m kA pF/m mA/m kA kA µΩ/m nH/m A A A
25 727/1200 927/1538 3.6/2.3 216 0.43 2.6 0.5 123 390 140 115 125 95 145 115
35 524/868 668/1113 5.0/3.2 237 0.47 2.6 0.6 115 370 170 135 150 115 175 140
50 387/641 494/822 6.8/4.4 260 0.52 2.6 0.6 109 350 210 160 180 135 220 170
70 268/443 343/568 9.8/6.3 298 0.60 2.6 0.7 103 330 255 195 215 165 270 210
95 193/320 248/410 13.3/8.5 334 0.67 2.6 0.7 99 310 300 230 255 200 330 250
120 153/253 196/325 17.2/11.0 365 0.73 2.6 0.8 96 310 340 265 290 225 375 295
150 124/206 159/265 21.2/13.5 392 0.78 4.3 0.8 93 300 380 295 330 255 430 330
185 99.1/164 128/211 26.6/17.0 430 0.86 4.3 0.9 90 290 430 335 370 290 490 385
240 75.4/125 98/161 34.9/22.3 476 0.95 4.3 0.9 87 280 490 380 425 335 570 450
300 60.1/100 80/130 43.8/28.0 524 1.05 4.3 1.0 85 270 540 435 470 375 650 510
400 47.0/77.8 64/102 57.3/36.6 580 1.16 5.8 1.1 81 260 590 480 520 420 700 570

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 Caledonian Medium Voltage Cables

Three Core 8.7/15KV (Um=17.5KV)

Dimensional Data
Unarmoured Cables Steel Wire Armoured Cables
Nom.
Cross- Copper Approx. Copper Nom. Approx.
Nom. Nom. Approx. Nom. Nom. Approx.
Section Insulation Wire Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Thickness Screen Thickness Diameter Screen
Thickness
Wire
Thickness Diameter
Area CU AL Area Diameter CU AL
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg / km
25 4.5 16 2.4 48.4 3000 2420 4.4 1.4 2.5 2.6 55.2 5600 5100
35 4.5 16 2.5 50.4 3450 2670 4.7 1.4 2.5 2.7 57.6 6130 5440
50 4.5 16 2.6 53.7 4140 3190 4.9 1.5 2.5 2.8 61.1 7010 6060
70 4.5 16 2.7 57.2 4980 3640 5.3 1.5 2.5 2.9 64.6 8030 6700
95 4.5 16 2.8 60.6 5900 4050 5.7 1.6 2.5 3.0 68.2 9160 7330
120 4.5 16 2.9 63.9 6870 4560 6.1 1.7 2.5 3.1 71.7 10340 8030
150 4.5 25 3.0 67.9 8030 5230 6.4 1.7 2.5 3.2 75.4 11730 8930
185 4.5 25 3.1 71.1 9310 5770 6.8 1.8 3.15 3.4 80.6 14170 10570
240 4.5 25 3.3 76.9 11390 6680 7.4 1.9 3.15 3.6 86.6 16670 11810
300 4.5 25 3.5 81.6 13510 7790 7.9 2.0 3.15 3.7 91.3 19140 13340
400 4.5 35 3.7 89.9 17130 9340 8.5 2.1 3.15 4.0 100.0 23360 15410

Electrical Data
Steel Wire
Unarmoured
Armoured Current Ratings
Cables
Cables
Nom. Short
Cross- Short Short Circuit Circuit
Ground Duct Air
Section Circuit Rating of Rating of
DC AC
Area Rating of Capaci- Charging Copper Wire Copper Reac- Induc-
Resistance Resistance
Conductor tance Current Screen Per Tape tance tance
CU / AL CU / AL
CU / AL Core Screen
CU AL Cu Al Cu Al
1 sec 1 sec Per Core
1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m A A A
25 727/1200 927/1538 3.6/2.3 176 0.48 2.6 0.6 138 410 140 115 125 95 145 115
35 524/868 668/1113 5.0/3.2 193 0.53 2.6 0.6 123 390 170 135 150 115 175 140
50 387/641 494/822 6.8/4.4 211 0.58 2.6 0.7 116 370 210 160 180 135 220 170
70 268/443 343/568 9.8/6.3 240 0.65 2.6 0.7 110 350 255 195 215 165 270 210
95 193/320 248/410 13.3/8.5 267 0.73 2.6 0.8 105 330 300 230 255 200 330 250
120 153/253 196//325 17.2/11.0 291 0.79 2.6 0.8 102 320 340 265 290 225 375 295
150 124/206 159/265 21.2/13.5 312 0.85 4.3 0.9 98 310 380 300 330 255 430 330
185 99.1/164 128/211 26.6/17.0 340 0.93 4.3 0.9 95 300 430 335 370 290 490 385
240 75.4/125 98/161 34.9/22.3 375 1.02 4.3 1.0 91 290 490 380 425 335 570 450
300 60.1/100 80/130 43.8/28.0 411 1.12 4.3 1.1 89 280 540 435 470 375 650 510
400 47.0/77.8 64/102 57.3/36.6 454 1.24 5.8 1.2 84 270 590 480 520 420 700 570
 Medium Voltage Cables to BS 6622

Three Core 12.7/22KV (Um=24KV)

Dimensional Data
Unarmoured Cables Steel Wire Armoured Cables
Nom.
Cross- Copper Approx. Copper Nom. Approx.
Nom. Nom. Approx. Nom. Nom. Approx.
Section Insulation Wire Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Thickness Screen Thickness Diameter Screen
Thickness
Wire
Thickness Diameter
Area CU AL Area Diameter CU AL
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg / km
35 5.5 16 2.7 51 3750 2880 5.2 1.5 2.5 2.8 62.3 6870 6140
50 5.5 16 2.8 54 4240 3250 5.4 1.5 2.5 2.9 65.6 7710 6810
70 5.5 16 2.9 58 5050 3650 5.9 1.6 2.5 3.0 69.0 8710 7370
95 5.5 16 3.0 62 6010 4110 6.2 1.7 2.5 3.2 73.1 10000 8130
120 5.5 16 3.1 65 6990 4660 6.6 1.7 3.15 3.3 77.7 12040 9730
150 5.5 25 3.2 68 8130 5330 6.9 1.8 3.15 3.4 81.7 13550 10750
185 5.5 25 3.3 72 9410 5870 7.4 1.9 3.15 3.6 85.5 15150 11610
240 5.5 25 3.5 79 11490 6880 7.8 2.0 3.15 3.7 91.3 17710 12840
300 5.5 25 3.7 84 13710 7890 8.2 2.0 3.15 3.9 96.0 20170 14360
400 5.5 35 3.9 91 17230 9440 9.0 2.2 3.15 4.1 104.8 24520 16480

Electrical Data
Steel Wire
Unarmoured
Armoured Current Ratings
Cables
Cables
Nom. Short
Cross- Short Short Circuit Circuit
Ground Duct Air
Section Circuit Rating of Rating of
DC AC
Area Rating of Capaci- Charging Copper Wire Copper Reac- Induc-
Resistance Resistance
Conductor tance Current Screen Tape tance tance
CU / AL CU / AL
CU / AL Per Core Screen
CU AL CU AL CU AL
1 sec 1 sec Per Core
1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m A A A
35 524/868 668/1113 5.0/3.2 168 0.67 2.6 0.7 129 410 170 135 155 120 180 145
50 387/641 494/822 6.8/4.4 183 0.73 2.6 0.8 122 390 210 160 185 140 225 175
70 268/443 343/568 9.8/6.3 207 0.83 2.6 0.8 115 370 255 195 225 170 275 215
95 193/320 248/410 13.3/8.5 229 0.92 2.6 0.9 110 350 295 230 260 205 330 260
120 153/253 196/325 17.2/11.0 249 1.00 2.6 0.9 106 340 335 260 300 235 380 300
150 124/206 159/265 21.2/13.5 266 1.06 4.3 1.0 103 330 375 290 335 265 430 335
185 99.1/164 128/211 26.6/17.0 289 1.16 4.3 1.0 100 320 420 330 380 300 490 390
240 75.4/125 98/161 34.9/22.3 318 1.27 4.3 1.1 95 300 480 380 430 345 570 460
300 60.1/100 80/130 43.8/28.0 348 1.39 4.3 1.2 93 300 530 425 480 385 650 520
400 47.0/77.8 64/102 57.3/36.6 383 1.53 5.8 1.3 87 280 590 480 520 420 700 570

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 Caledonian Medium Voltage Cables

Three Core 19/33KV (Um=36KV)

Dimensional Data
Unarmoured Cables Steel Wire Armoured Cables
Nom.
Cross- Copper Approx. Copper Nom. Approx.
Nom. Nom. Approx. Nom. Nom. Approx.
Section Insulation Wire Sheath Overall Weight Tape
Bedding
Armour
Sheath Overall Weight
Area Thickness Screen Thickness Diameter Screen
Thickness
Wire
Thickness Diameter
Area CU AL Area Diameter CU AL
mm² mm mm² mm mm kg/km mm² mm mm mm mm kg / km
35 8.0 16 3.1 60 3750 2880 6.5 1.7 2.5 3.2 74.9 9460 8700
50 8.0 16 3.2 65 5240 4260 6.7 1.8 3.15 3.4 79.0 10620 9680
70 8.0 16 3.3 70 6120 4730 7.1 1.8 3.15 3.5 82.5 11840 10440
95 8.0 16 3.4 74 7140 5240 7.5 1.9 3.15 3.6 86.4 13200 11350
120 8.0 16 3.5 77 8080 5710 7.9 2.0 3.15 3.7 89.9 14520 12190
150 8.0 25 3.6 80 9120 6220 8.2 2.0 3.15 3.8 93.6 16070 13280
185 8.0 25 3.7 84 10440 6940 8.6 2.1 3.15 3.9 97.3 17710 14090
240 8.0 25 3.9 91 12620 8010 9.2 2.2 3.15 4.1 103.2 20370 15460
300 8.0 25 4.0 95 14690 8800 9.7 2.3 3.15 4.3 108.2 22980 17210
400 8.0 35 4.3 103 17720 10230 10.3 2.4 3.15 4.5 116.8 27480 19450

Electrical Data
Aluminium
Unarmored Wire
Current Ratings
Cables Armoured
Cables
Nom. Short Short
Cross- Circuit Circuit
Short Circuit Ground Duct Air
Section Rating of Rating of
DC AC Rating of
Area Capaci- Charging Copper Copper Reac- Induc-
Resistance Resistance Conductor
tance Current Wire Tape tance tance
CU / AL CU / AL CU / AL
Screen Screen
1 sec CU AL CU AL CU AL
Per Core Per Core
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m A A A
35 524/868 668/1113 5.0/3.2 132 0.79 2.6 0.9 140 460 170 135 155 120 180 145
50 387/641 494/822 6.8/4.4 142 0.85 2.6 1.0 134 430 210 160 185 140 225 175
70 268/443 343/568 9.8/6.3 159 0.95 2.6 1.0 127 400 255 195 225 170 275 215
95 193/320 248/410 13.3/8.5 175 1.05 2.6 1.1 121 390 295 230 260 205 330 260
120 153/253 196/325 17.2/11.0 189 1.13 2.6 1.1 117 370 335 260 300 235 380 300
150 124/206 159/265 21.2/13.5 201 1.21 4.3 1.2 113 360 375 290 335 265 430 335
185 99.1/164 128/211 26.6/17.0 217 1.30 4.3 1.2 109 350 420 330 380 300 490 390
240 75.4/125 98/161 34.9/22.3 237 1.42 4.3 1.3 104 330 480 380 430 345 570 460
300 60.1/100 80/130 43.8/28.0 258 1.55 4.3 1.4 101 320 530 425 480 385 650 520
400 47.0/77.8 64/102 57.3/36.6 282 1.69 5.8 1.5 96 290 590 480 520 420 700 570
Caledonian
Medium Voltage
Cables

I
III II III
Medium Voltage Cables to IEC 60502
IV V

Single Core Cables To IEC 60502

Three Core Cables To IEC 60502

 Caledonian Medium Voltage Cables

Single Core Cables to IEC 60502

▓▓ APPLICATIONS:
The single core cables are designed for distribution
of electrical power with nominal voltage Uo/U
ranging from 1.8/3KV to 26/35KV and frequency
50Hz. They are suitable for installation mostly
in power supply stations, indoors and in cable
ducts, outdoors, underground and in water as well
as for installation on cable trays for industries,
switchboards and power stations.

▓▓ STANDARD: PVC/PE/LSZH Oversheath

Aluminium Wire Armour(optional)
Binder
XLPE/EPR/HEPR Insulation Screen
IEC 60502 Part 1(1.8/3KV) Conductor
IEC 60502 Part 2(3.6/6KV to 18/30KV) Conductor Screen
Insulation Screen
Metallic Screen
▓▓ CONSTRUCTION: PVC/PE/LSZH Separation Sheath(optional)

Conductor: Plain annealed copper or aluminium complying with IEC 60228 class 1 or 2.
Conductor Screen: The conductor screen consists of an extruded layer of non metallic,
semi-conducting compound firmly bonded to the insulation to exclude all air voids. The
conductor screen is not necessary for both PVC and EPR/HEPR insulated 1.8/3KV and
3.6/6KV cables.
Insulation: Insulation is of polyvinyl chloride (PVC) intended for 1.8/3KV and 3.6/6KV cables,
cross-linked polyethylene compound (XLPE) or ethylene propylene rubber (EPR/HEPR).
Table 1. Insulation Thickness Of XLPE Or EPR/HEPR Insulation
Nom. Insulation Thickness at Nominal Voltage
Cross
Section 1.8/3KV 3.6/6KV 6/10KV 8.7/15KV 12/20KV 18/30KV 21/35KV 26/35KV
Area (Um=3.6KV) (Um=7.2KV) (Um=12KV) (Um=17.5KV) (Um=24KV) (Um=36KV) (Um=42KV) (Um=42KV)
mm² mm mm mm mm mm mm mm mm
XLPE EPR
XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR
Unscreened Screened
10 2.0 2.5 3.0 2.5 - - - - - -
16 2.0 2.5 3.0 2.5 3.4 - - - - -
25 2.0 2.5 3.0 2.5 3.4 4.5 - - - -
35 2.0 2.5 3.0 2.5 3.4 4.5 5.5 - - -
50 – 185 2.0 2.5 3.0 2.5 3.4 4.5 5.5 8.0 9.3 10.5
240 2.0 2.6 3.0 2.6 3.4 4.5 5.5 8.0 9.3 10.5
300 2.0 2.8 3.0 2.8 3.4 4.5 5.5 8.0 9.3 10.5
400 2.0 3.0 3.0 3.0 3.4 4.5 5.5 8.0 9.3 10.5
500 - 1600 2.2-2.8 3.2 3.2 3.2 3.4 4.5 5.5 8.0 9.3 10.5
*Insulation Thickness of PVC is 3.4mm (1- 1600mm sq) for 3.6/6KV cables.
 Medium Voltage Cables to IEC 60502
Insulaton Screen: The insulation screen consists of an extruded layer of non metallic, semi-
conducting compound extruded over the insulation. The extruded semi-conducting layer
shall consist of bonded or cold strippable semi-conducting compound capable of removal
for jointing or terminating. As an option, a semi-conducting tape may be applied over the
extruded semi-conducting layer as a bedding for the metallic layer. The minimum thickness
is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen is tightly fitted to
the insulation to exclude all air voids and can be easily hand stripped on site. The insulation
screen is not necessary for both PVC and EPR/HEPR insulated 1.8/3KV and 3.6/6KV cables.
The screen may be covered by semi-conductive water blocking swellable tape to ensure
longitudinal watertightness.
Metallic Layer: The metallic layer may be applied over the individual cores or the core
assembly collectively.
The following types of metallic layers are provided:
1) Metallic Screen
2) Concentric Conductor
3) Metallic Sheath
4) Metallic armour
The metallic screen shall consist of either copper tapes or a concentric layer of copper wires
or a combination of tapes and wires to provide an earth fault current path. The concentric
conductor is applied directly either over the insulation, or over the insulation screen or over
an inner covering. The metallic sheath consists of lead or lead alloy applied as a tightly fitting
seamless tube. The metallic armour consists of either flat wire armour, round wire armour,
and double tape armour.

Table 2. Minimum Total Cross Section Of Metallic Screen

Nom. Cross-Section Min. Cross-Section
DC Resistance of the Copper Wire Screen
Area of Cable of Metallic Screen

mm² mm² mm
up to 120 16 1.06
150-300 25 0.72
400-630 35 0.51
800-1000 50 0.35

Separation Sheath (for armoured cable): The separation sheath comprises a layer of
extruded PVC, PE or LSZH, applied under the armour .The nominal thickness is calculated
by 0.02Du + 0.6mm where Du is the fictitious diameter under the sheath in mm. For cables
without a lead sheath, the nominal separation sheath thickness shall not be less than
1.2mm. For cables where the separation sheath is applied over the lead sheath, the nominal
separation sheath thickness shall not be less than 1.0mm.
Lapped Bedding (for armoured lead sheathed cable): The lapped bedding consists of
either impregnated/synthetic compounded paper tapes or a combination of two layers of
these paper tapes followed by a few layers of compounded fabulous materials. The thickness
is around 1.5mm.
Armour (for armoured cable): The armour consists of round aluminium wire armour applied
helically over an extruded separation sheath.
Table 3. Round Armour Wire Diameter

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 Caledonian Medium Voltage Cables
Fictitious Diameter Under the Armour Armour Wire Diameter
mm mm
> <
- 10 0.8
10 15 1.25
15 25 1.6
25 35 2.0
35 60 2.5
60 - 3.15

Over Sheath: Overall sheath comprises a layer of extruded thermoplastic compound (PVC,
PE or LSZH can be offered as an option.) or elastomeric compound (polychlorprene CSP or
chlorosulfonated PE). The nominal oversheath thickness is calculated by 0.035D+1 where D
is the fictitiuous diameter immediately under the oversheath in mm. For unarmoured cables
and cables with the oversheath not applied over the armour, metallic screen or concentric
conductor, the nominal oversheath thickness shall not be less than 1.4mm. And for cables
with oversheath applied over the armour, metallic screen or concentric conductor, the nominal
oversheath thickness shall not be less than 1.8mm.

▓▓ PHYSICAL PROPERTIES:

Operating Temperature: up to 70°C (PVC insulation); up to 90°C (XLPE or EPR insulation)

Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature( 5 seconds maximum duration ): 140-160°C (PVC insulation);
250°C (XLPE or EPR insulation)
Bending Radius: 12 x OD

Table 4. Nominal /Operating /Testing Voltages

Rated Voltage Uo/U Operating Voltage (Um) Testing Voltage (rms)
1.8/3KV 3.6KV 6.5KV
3.6/6KV 7.2KV 12.5KV
6/10KV 12KV 21KV
8.7/15KV 17.5KV 30.5KV
12/20KV 24KV 42KV
18/30KV 36KV 63KV
21/35KV 42KV 73.5(53)*KV
26/35KV 42KV 91(65)*KV
*21/35KV and 26/35kV power frequency voltage test can be made under the following conditions: 2.5Uo x 30mins or 3.0Uo x 15mins.
Numbers in brackets refer to the test values for 3.0Uo x 1.5mins.
 Medium Voltage Cables to IEC 60502

Single Core 1.8/3KV (Um=3.6KV)

Dimensional Data
Unarmoured Cables Steel Wire Armoured Cables
Nom.
Cross- Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Section Insulation Wire Weight Weight
Tape Sheath Overall Bedding Wire Sheath Overall
Area Thickness Thickness Screen Thickness Diameter Thickness Size Thickness Diameter
Area* CU AL CU AL
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
10 2.0 0.1 16 1.8 13 240 180 1.2 1.6 1.8 18 460 400
16 2.0 0.1 16 1.8 13 300 200 1.2 1.6 1.8 19 530 430
25 2.0 0.1 16 1.8 15 410 250 1.2 1.6 1.8 20 650 500
35 2.0 0.1 16 1.8 16 510 300 1.2 1.6 1.8 21 780 560
50 2.0 0.1 16 1.8 17 640 350 1.2 1.6 1.8 22 930 640
70 2.0 0.1 16 1.8 19 850 440 1.2 1.6 1.8 24 1170 750
95 2.0 0.1 16 1.8 20 1130 540 1.2 1.6 1.8 26 1460 870
120 2.0 0.1 16 1.8 22 1370 630 1.2 1.6 1.8 27 1730 990
150 2.0 0.1 25 1.8 23 1650 730 1.2 1.6 1.8 29 2030 1110
185 2.0 0.1 25 1.8 25 2010 860 1.2 1.6 1.9 30 2430 1280
240 2.0 0.1 25 1.8 27 2570 1050 1.2 1.6 2.0 33 3040 1530
300 2.0 0.1 25 1.8 29 3160 1250 1.2 2.0 2.1 36 3760 1860
400 2.0 0.1 35 1.9 33 3980 1560 1.2 2.0 2.2 39 4660 2230
500 2.2 0.1 35 2.1 35.5 4910 1905 1.3 2.5 2.5 43 5930 2930
630 2.4 0.1 35 2.2 39.7 6340 2420 1.4 2.5 2.6 49 7370 3430
800 2.6 0.1 50 2.3 44.5 7890 2980 1.4 2.5 2.7 52 9070 4230
1000 2.8 0.1 50 2.5 49.4 9890 3700 1.5 2.5 2.9 56 11100 4950
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short
Short Short Reactance Inductance Impedance
Circuit
Nom. Circuit Circuit Rating
DC AC Rating of
Cross- Rating of Capaci- Charging of Copper Trefoil Flat Spaced
Resistance Resistance Copper
Section Conductor tance Current Wire Flat Flat
CU / AL CU / AL Tape Trefoil Trefoil
Area CU / AL Screen Spaced Spaced
Screen cu AL cu AL
1 sec 1 sec
1 sec
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/ m
10 1830/3080 2330/3920 1.4/0.9 182 0.27 2.6 0.2 151 201 384 558 2332 3846 2332 3840
16 1150/1910 1460/2420 2.2/1.4 201 0.29 2.6 0.3 140 193 362 546 1462 2411 1478 2420
25 727/1200 927/1538 3.6/2.3 222 0.32 2.6 0.3 131 185 345 535 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 251 0.35 2.6 0.4 122 178 327 524 679 1121 695 1131
50 387/641 494/822 6.8/4.4 281 0.39 2.6 0.4 116 172 313 514 511 834 527 844
70 268/443 343/568 9.8/6.3 341 0.45 2.6 0.5 110 165 300 495 364 583 386 597
95 193/320 248/410 13.3/8.5 397 0.50 2.6 0.5 104 160 287 485 272 427 300 446
120 153/253 196/325 17.2/11.0 430 0.55 2.6 0.6 104 159 283 480 225 345 257 367
150 124/206 159/266 21.2/13.5 464 0.59 4.3 0.6 100 156 280 475 193 287 229 313
185 99.1/164 128/211 26.6/17.0 513 0.65 4.3 0.7 98 154 274 465 165 237 206 267
240 75.4/125 98/161 34.9/22.3 573 0.70 4.3 0.9 94 150 267 459 140 191 185 226
300 60.1/100 80/130 43.8/28.0 652 0.72 4.3 1.0 91 147 260 455 128 163 174 203
400 47.0/77.8 64/102 57.3/36.6 727 0.75 5.8 1.1 90 147 253 445 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 754 0.79 5.8 1.2 89 145 248 435 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 786 0.87 5.8 1.3 86 143 245 425 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 846 0.91 8.2 1.4 85 142 243 415 92 101 147 153
1000 17.6/29.1 30/46 143.0/94.0 916 0.99 8.2 1.5 83 141 239 405 88 95 144 148

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 Caledonian Medium Voltage Cables

Single Core 3.6/6KV (Um=7.2KV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom. Copper
Nom. Copper Nom. Approx. Approx. Nom. Armour Nom. Approx. Approx.
Cross- Wire Weight Weight
Section Insulation Tape
Screen
Sheath Overall Bedding Wire Sheath Overall
Area Thickness Thickness Area* Thickness Diameter CU AL Thickness Size Thickness Diameter CU AL
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
10 2.5 0.1 16 1.8 16 320 260 1.2 1.6 1.8 22 610 550
16 2.5 0.1 16 1.8 16 390 290 1.2 1.6 1.8 22 680 580
25 2.5 0.1 16 1.8 18 500 340 1.2 1.6 1.8 23 810 660
35 2.5 0.1 16 1.8 19 610 400 1.2 1.6 1.8 24 940 730
50 2.5 0.1 16 1.8 20 750 450 1.2 1.6 1.8 26 1100 810
70 2.5 0.1 16 1.8 22 970 550 1.2 1.6 1.8 27 1350 930
95 2.5 0.1 16 1.8 23 1250 660 1.2 1.6 1.9 29 1670 1080
120 2.5 0.1 16 1.8 25 1500 760 1.2 1.6 1.9 31 1950 1200
150 2.5 0.1 25 1.8 26 1790 860 1.2 1.6 2.0 32 2270 1350
185 2.5 0.1 25 1.8 28 2150 1000 1.2 2.0 2.1 35 2770 1620
240 2.6 0.1 25 1.9 31 2770 1250 1.2 2.0 2.2 38 3440 1930
300 2.8 0.1 25 2.0 34 3400 1500 1.2 2.0 2.2 41 4120 2210
400 3.0 0.1 35 2.1 38 4280 1850 1.3 2.5 2.4 46 5250 2820
500 3.2 0.1 35 2.1 41.5 5325 2240 1.4 2.5 2.6 50 6520 3520
630 3.2 0.1 35 2.2 45.3 6745 2750 1.5 2.5 2.7 56 7960 4020
800 3.2 0.1 50 2.4 49.9 8290 3310 1.5 2.5 2.8 59 9660 4820
1000 3.2 0.1 50 2.5 54.2 10255 3990 1.6 2.5 3.0 63 11690 5540
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short
Short Reactance Inductance Impedance
Short Circuit Circuit
Nom. Circuit
DC AC Rating Rating
Cross- Rating of Capaci- Charging
Resistance Resistance of Copper of Copper Trefoil Flat Spaced
Section Conductor tance Current Flat Flat
CU / AL CU / AL Wire Screen Tape Trefoil Trefoil
Area CU / AL Spaced Spaced
1 sec Screen
1 sec CU AL CU AL
1 sec
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/m
10 1830/3080 2330/3920 1.4/0.9 202 0.26 2.6 0.4 160 214 420 610 2332 3846 2345 3840
16 1150/1910 1460/2420 2.2/1.4 232 0.29 2.6 0.4 152 205 410 600 1462 2411 1478 2421
25 727/1200 927/1538 3.6/2.3 262 0.32 2.6 0.4 142 196 400 590 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 291 0.35 2.6 0.5 133 187 390 580 679 1121 695 1131
50 387/641 494/822 6.8/4.4 321 0.39 2.6 0.5 121 179 380 570 511 834 527 844
70 268/443 343/568 9.8/6.3 371 0.45 2.6 0.6 115 173 370 550 364 583 386 597
95 193/320 248/410 13.3/8.5 417 0.50 2.6 0.6 110 168 350 540 272 427 300 446
120 153/253 196/325 17.2/11.0 459 0.55 2.6 0.7 107 165 340 520 225 345 257 367
150 124/206 159/265 21.2/13.5 494 0.59 4.3 0.7 103 161 330 510 193 287 229 313
185 99.1/164 128/211 26.6/17.0 543 0.65 4.3 0.8 100 158 320 500 165 237 206 267
240 75.4/125 98/161 34.9/22.3 583 0.70 4.3 0.9 97 155 310 490 140 191 185 226
300 60.1/100 80/130 43.8/28.0 602 0.72 4.3 1.0 95 153 300 490 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 627 0.75 5.8 1.1 92 150 290 480 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 654 0.79 5.8 1.2 90 147 290 470 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 726 0.87 5.8 1.3 87 145 280 460 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 786 0.91 8.2 1.4 85 143 270 460 92 101 147 153
1000 17.6/29.1 30/46 143.0/94.0 856 0.99 8.2 1.5 83 141 260 450 88 95 144 148
* For capacitance & charging current values, multiply values shown by 1.2 for EPR insulated cables.
 Medium Voltage Cables to IEC 60502

Single Core 6/10KV (Um=12KV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Section Insulation Wire Weight Weight
Tape Sheath Overall Bedding Wire Sheath Overall
Area Thickness Thickness Screen Thickness Diameter Thickness Size Thickness Diameter
Area* CU AL CU AL
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
16 3.4 0.1 16 1.8 18 450 350 1.2 1.6 1.8 24 770 670
25 3.4 0.1 16 1.8 20 560 400 1.2 1.6 1.8 25 910 750
35 3.4 0.1 16 1.8 21 680 460 1.2 1.6 1.8 26 1040 820
50 3.4 0.1 16 1.8 22 810 520 1.2 1.6 1.8 28 1190 900
70 3.4 0.1 16 1.8 24 1050 620 1.2 1.6 1.9 29 1470 1040
95 3.4 0.1 16 1.8 25 1320 730 1.2 1.6 2.0 31 1780 1190
120 3.4 0.1 16 1.8 27 1580 840 1.2 2.0 2.0 34 2150 1410
150 3.4 0.1 25 1.9 28 1880 960 1.2 2.0 2.1 35 2480 1560
185 3.4 0.1 25 1.9 30 2250 1100 1.2 2.0 2.1 37 2890 1730
240 3.4 0.1 25 2.0 33 2870 1350 1.2 2.0 2.2 40 3570 2050
300 3.4 0.1 25 2.1 35 3490 1580 1.2 2.0 2.3 42 4230 2330
400 3.4 0.1 35 2.2 39 4350 1920 1.3 2.5 2.4 47 5320 2890
500 3.4 0.1 35 2.2 39.9 5235 2240 1.4 2.5 2.5 51 6510 3530
630 3.4 0.1 35 2.3 43.7 6675 2765 1.5 2.5 2.6 56 7960 4050
800 3.4 0.1 50 2.5 48.6 8225 3330 1.5 2.5 2.7 59 9670 4850
1000 3.4 0.1 50 2.6 52.9 10210 4030 1.6 2.5 2.9 63 11710 5570
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short
Short Reactance Inductance Impedance
Circuit Circuit
Nom. Circuit
DC AC Rating of Rating of
Cross- Rating of Capaci- Charging
Resistance Resistance Copper Copper Trefoil Flat spaced
Section Conductor tance Current Flat Flat
CU / AL CU / AL Wire Tape Trefoil Trefoil
Area CU / AL Spaced Spaced
Screen Screen
1 sec CU AL CU AL
1 sec 1 sec
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/m
16 1150/1910 1460/2420 2.2/1.4 187 0.39 2.6 0.5 152 216 480 680 1462 2411 1478 2421
25 727/1200 927/1538 3.6/2.3 208 0.42 2.6 0.5 144 210 460 660 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 229 0.46 2.6 0.6 136 200 440 640 679 1121 695 1131
50 387/641 494/822 6.8/4.4 252 0.50 2.6 0.6 131 195 420 620 511 834 527 844
70 268/443 343/568 9.8/6.3 288 0.58 2.6 0.7 122 188 390 600 364 583 386 597
95 193/320 248/410 13.3/8.5 323 0.65 2.6 0.7 122 182 390 580 272 427 300 446
120 153/253 196/325 17.2/11.0 353 0.71 2.6 0.8 116 172 370 550 225 345 257 367
150 124/206 159/265 21.2/13.5 380 0.76 4.3 0.8 110 166 350 530 193 287 229 313
185 99.1/164 128/211 26.6/17.0 416 0.83 4.3 0.9 107 166 340 530 165 237 206 267
240 75.4/125 98/161 34.9/22.3 460 0.92 4.3 0.9 104 163 330 520 140 191 185 226
300 60.1/100 80/130 43.8/28.0 506 1.01 4.3 1.0 100 157 320 500 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 561 1.12 5.8 1.1 94 154 300 490 113 141 164 184
500 36.6/60.5 51/81.0 72.3/46.2 619 1.24 5.8 1.2 91 151 290 480 105 124 158 171
630 28.3/46.9 42/64.0 91.2/58.3 698 1.37 5.8 1.3 91 148 290 470 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 780 1.39 8.2 1.4 88 144 280 470 92 101 147 153
1000 17.6/29.1 30/46 143.0/94.0 860 1.54 8.2 1.5 85 143 270 460 88 95 144 148
* For capacitance & charging current values, multiply values shown by 1.2 for EPR insulated cables.

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 Caledonian Medium Voltage Cables

Single Core 8.7/15KV (Um=17.5KV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Section Insulation Wire Weight Weight
Tape Sheath Overall Bedding Wire Sheath Overall
Area Thickness Thickness Screen Thickness Diameter Thickness Size Thickness Diameter
Area* CU AL CU AL
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
25 4.5 0.1 16 1.8 22 640 480 1.2 1.6 1.8 28 1020 860
35 4.5 0.1 16 1.8 23 760 540 1.2 1.6 1.9 29 1170 950
50 4.5 0.1 16 1.8 24 900 610 1.2 1.6 1.9 30 1340 1040
70 4.5 0.1 16 1.8 26 1140 710 1.2 1.6 2.0 32 1610 1190
95 4.5 0.1 16 1.8 27 1420 830 1.2 2.0 2.1 35 2020 1430
120 4.5 0.1 16 1.9 29 1700 950 1.2 2.0 2.1 36 2310 1570
150 4.5 0.1 25 1.9 31 1990 1070 1.2 2.0 2.2 38 2660 1740
185 4.5 0.1 25 2.0 32 2380 1230 1.2 2.0 2.2 39 3070 1920
240 4.5 0.1 25 2.1 35 3010 1490 1.2 2.0 2.3 42 3750 2240
300 4.5 0.1 25 2.1 37 3620 1720 1.3 2.5 2.4 46 4590 2690
400 4.5 0.1 35 2.2 41 4490 2070 1.3 2.5 2.5 49 5550 3120
500 4.5 0.1 35 2.3 43 5460 2460 1.3 2.5 2.6 52 6590 3600
630 4.5 0.1 35 2.4 48 6790 2590 1.4 2.5 2.7 57 8060 4110
800 4.5 0.1 50 2.6 52 8420 3570 1.5 2.5 2.8 61 9800 4970
1000 4.5 0.1 50 2.7 55 10330 4180 1.6 2.5 3.0 65 10850 5710
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short
Short Reactance Inductance Impedance
Circuit Circuit
Nom. Circuit
DC AC Rating of Rating of
Cross- Rating of Capaci- Charging
Resistance Resistance Copper Copper Trefoil Flat spaced
Section Conductor tance Current Flat Flat
CU / AL CU / AL Wire Tape Trefoil Trefoil
Area CU / AL Spaced Spaced
Screen Screen
1 sec CU AL CU AL
1 sec 1 sec
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/m
25 727/1200 927/1538 3.6/2.3 171 0.47 2.6 0.6 150 210 480 680 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 187 0.51 2.6 0.6 141 207 460 660 679 1121 695 1131
50 387/641 494/822 6.8/4.4 204 0.57 2.6 0.7 138 195 440 640 511 834 527 844
70 268/443 343/568 9.8/6.3 232 0.63 2.6 0.7 132 188 420 600 364 583 386 597
95 193/320 248/410 13.3/8.5 258 0.71 2.6 0.8 126 182 400 580 272 427 300 446
120 153/253 196/325 17.2/11.0 281 0.74 2.6 0.8 119 179 380 570 225 345 257 367
150 124/206 159/265 21.2/13.5 301 0.79 4.3 0.9 113 176 360 560 193 287 229 313
185 99.1/164 128/211 26.6/17.0 329 0.87 4.3 0.9 110 170 350 540 165 237 206 267
240 75.4/125 98/161 34.9/22.3 363 0.96 4.3 1.0 107 166 340 530 140 191 185 226
300 60.1/100 80/130 43.8/28.0 398 1.03 4.3 1.1 104 160 330 510 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 439 1.17 5.8 1.2 97 157 310 500 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 483 1.28 5.8 1.3 94 154 300 490 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 534 1.42 5.8 1.4 91 151 290 480 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 590 1.61 8.2 1.4 91 147 290 470 92 101 147 153
1000 17.6/29.1 30/46 143.0/94.0 640 1.75 8.2 1.5 88 144 280 460 88 95 144 148
* For capacitance & charging current values, multiply values shown by 1.2 for EPR insulated cables.
 Medium Voltage Cables to IEC 60502

Single Core 12/20KV (Um=24KV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Section Insulation Wire Weight Weight
Tape Sheath Overall Bedding Wire Sheath Overall
Area Thickness Thickness Screen Thickness Diameter Thickness Size Thickness Diameter
Area* Cu AL Cu AL
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
25 5.5 0.1 16 1.8 24 720 560 1.2 1.6 1.8 29 1200 980
35 5.5 0.1 16 1.8 25 840 620 1.2 1.6 1.9 30 1350 1070
50 5.5 0.1 16 1.8 26 990 690 1.2 2.0 2.0 33 1550 1250
70 5.5 0.1 16 1.8 28 1230 800 1.2 2.0 2.1 35 1840 1420
95 5.5 0.1 16 1.9 30 1530 940 1.2 2.0 2.1 37 2160 1570
120 5.5 0.1 16 2.0 31 1810 1050 1.2 2.0 2.2 38 2470 1730
150 5.5 0.1 25 2.0 33 2110 1190 1.2 2.0 2.2 40 2810 1890
185 5.5 0.1 25 2.1 35 2510 1360 1.2 2.0 2.3 42 3240 2090
240 5.5 0.1 25 2.1 38 3130 1610 1.3 2.5 2.4 45 4150 2580
300 5.5 0.1 25 2.2 40 3760 1860 1.3 2.5 2.5 48 4800 2890
400 5.5 0.1 35 2.3 43 4650 2220 1.4 2.5 2.6 52 5780 3350
500 5.5 0.1 35 2.4 46 5530 2545 1.5 2.5 2.7 55 6850 3850
630 5.5 0.1 35 2.5 50 6700 3100 1.5 2.5 2.9 60 8380 4400
800 5.5 0.1 50 2.6 55 8580 3690 1.6 2.5 3.0 64 10130 5270
1000 5.5 0.1 50 2.7 59 10620 4445 1.7 2.5 3.1 68 12180 6000
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short
Short Reactance Inductance Impedance
Short Circuit Circuit
Nom. Circuit
DC AC Rating of Rating of
Cross- Rating of Capaci- Charging
Resistance Resistance Copper Wire Copper Trefoil Flat spaced
Section Conductor tance Current Flat Flat
CU / AL CU / AL Screen Tape Trefoil Trefoil
Area CU / AL Spaced Spaced
1 sec Screen
1 sec Cu AL Cu AL
1 sec
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/m
25 727/1200 927/1538 3.6/2.3 142 0.62 2.6 0.6 162 214 490 680 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 162 0.65 2.6 0.7 150 207 470 660 679 1121 695 1131
50 387/641 494/822 6.8/4.4 177 0.71 2.6 0.8 141 201 450 640 511 834 527 844
70 268/443 343/568 9.8/6.3 200 0.80 2.6 0.8 135 195 430 620 364 583 386 597
95 193/320 248/410 13.3/8.5 222 0.89 2.6 0.9 129 188 410 600 272 427 300 446
120 153/253 196/325 17.2/11.0 241 0.96 2.6 0.9 122 182 390 580 225 345 257 367
150 124/206 159/265 21.2/13.5 257 1.03 4.3 1.0 116 176 370 560 193 287 229 313
185 99.1/164 128/211 26.6/17.0 280 1.12 4.3 1.0 116 173 370 550 165 237 206 267
240 75.4/125 98/161 34.9/22.3 307 1.23 4.3 1.1 110 170 350 540 140 191 185 226
300 60.1/100 80/130 43.8/28.0 336 1.34 4.3 1.2 107 166 340 530 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 370 1.48 5.8 1.3 100 160 320 510 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 406 1.62 5.8 1.4 97 154 310 490 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 449 1.80 5.8 1.5 94 151 300 480 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 490 1.85 8.2 1.6 91 151 290 480 92 101 147 153
1000 17.6/29.1 30/46 143.0/94.0 540 2.03 8.2 1.7 87 148 280 470 88 95 144 148
* For capacitance & charging current values, multiply values shown by 1.2 for EPR insulated cables.

39
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 Caledonian Medium Voltage Cables

Single Core 18/30KV (Um=36KV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Section Insulation Wire Weight Weight
Tape Sheath Overall Bedding Wire Sheath Overall
Area Thickness Thickness Screen Thickness Diameter Thickness Size Thickness Diameter
Area* Cu AL Cu AL
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
50 8.0 0.1 16 2.0 31 1250 960 1.2 2.0 2.2 38 1910 1640
70 8.0 0.1 16 2.0 34 1510 1090 1.2 2.0 2.3 41 2240 1820
95 8.0 0.1 16 2.1 35 1830 1240 1.2 2.0 2.3 42 2570 1980
120 8.0 0.1 16 2.1 37 2110 1360 1.3 2.5 2.4 45 3060 2310
150 8.0 0.1 25 2.2 38 2420 1510 1.3 2.5 2.5 47 3430 2510
185 8.0 0.1 25 2.2 40 2830 1680 1.3 2.5 2.5 50 3890 2720
240 8.0 0.1 25 2.3 43 3500 1980 1.4 2.5 2.6 52 4630 3120
300 8.0 0.1 25 2.4 45 4150 2250 1.4 2.5 2.7 54 5330 3430
400 8.0 0.1 35 2.5 49 5070 2640 1.5 2.5 2.8 58 6360 3930
500 8.0 0.1 35 2.6 52 5945 2965 1.6 2.5 2.9 61 7670 4490
630 8.0 0.1 35 2.7 56 7445 3555 1.7 2.5 3.0 65 8870 5020
800 8.0 0.1 50 2.8 61 9060 4180 1.9 2.5 3.2 69 10790 5980
1000 8.0 0.1 50 2.9 65 11140 4980 2.0 2.5 3.3 73 12860 6730
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Short Short
Short Reactance Inductance Impedance
Circuit Circuit
Nom. Circuit
DC AC Rating of Rating of
Cross- Rating of Capaci- Charging
Resistance Resistance Copper Copper Trefoil Flat spaced
Section Conductor tance Current Flat Flat
CU / AL CU / AL Wire Tape Trefoil Trefoil
Area CU / AL spaced spaced
Screen Screen
1 sec Cu AL Cu AL
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/ m
50 387/641 494/822 6.8/4.4 138 0.83 2.6 1.0 151 214 480 680 511 834 527 844
70 268/443 343/568 9.8/6.3 154 0.92 2.6 1.0 144 201 460 640 364 583 386 597
95 193/320 248/410 13.3/8.5 169 1.01 2.6 1.1 138 195 440 620 272 427 300 446
120 153/253 196/325 17.2/11.0 183 1.10 2.6 1.1 132 188 420 600 225 345 257 367
150 124/206 159/265 21.2/13.5 194 1.16 4.3 1.2 126 182 400 580 193 287 229 313
185 99.1/164 128/211 26.6/17.0 210 1.26 4.3 1.2 122 182 390 580 165 237 206 267
240 75.4/125 98/161 34.9/22.3 229 1.37 4.3 1.3 119 176 380 560 140 191 185 226
300 60.1/100 80/130 43.8/28.0 249 1.49 4.3 1.4 113 173 360 550 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 273 1.64 5.8 1.5 107 163 340 520 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 298 1.79 5.8 1.6 104 163 330 520 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 327 1.96 5.8 1.7 100 160 320 510 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 350 1.98 8.2 1.8 97 154 310 490 92 101 147 153
1000 17.6/29.1 30/46 143.0/94.0 380 2.15 8.2 1.9 94 149 300 490 88 95 144 148
* For capacitance & charging current values, multiply values shown by 1.2 for EPR insulated cables.
 Medium Voltage Cables to IEC 60502

Single Core 21/35KV (Um=42KV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Section Insulation Wire Weight Weight
Tape Sheath Overall Bedding Wire Sheath Overall
Area Thickness Thickness Screen Thickness Diameter Thickness Size Thickness Diameter
Area* Cu Al Cu Al
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
50 9.3 0.1 16 2.0 35.7 1526 1239 1.2 2.0 2.3 43.5 2331 2116
70 9.3 0.1 16 2.1 37.6 1809 1393 1.2 2.5 2.4 46.6 2680 2325
95 9.3 0.1 16 2.2 39.4 2123 1555 1.2 2.5 2.5 48.4 2981 2482
120 9.3 0.1 16 2.2 40.8 2405 1688 1.4 2.5 2.5 49.8 3487 2867
150 9.3 0.1 25 2.2 42.3 2733 1838 1.4 2.5 2.6 51.5 3870 3055
185 9.3 0.1 25 2.3 44.7 3216 2082 1.4 2.5 2.6 53.5 4420 3370
240 9.3 0.1 25 2.4 46.9 3766 2333 1.4 2.5 2.7 55.8 4981 3676
300 9.3 0.1 25 2.4 49.3 4408 2605 1.4 2.5 2.8 58.5 5661 3971
400 9.3 0.1 35 2.5 52.3 5473 3057 1.6 2.5 2.9 61.7 6865 4550
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short Short Reactance Inductance Impedance
Circuit Circuit Circuit
Nom.
DC AC Rating Rating of Rating of
Cross- Capaci- Charging
Resistance Resistance of Copper Copper Trefoil Flat spaced
Section tance Current Flat Flat
CU / AL CU / AL Conductor Wire Tape Trefoil Trefoil
Area Spaced Spaced
CU / AL Screen Screen
1 sec 1 sec 1 sec Cu Al Cu Al

mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/ m

50 387/641 494/822 6.8/4.4 130 0.89 2.6 1.1 156 220 495 700 511 834 527 844
70 268/443 343/568 9.8/6.3 144 0.98 2.6 1.1 150 204 475 650 364 583 386 597
95 193/320 248/410 13.3/8.5 159 1.06 2.6 1.2 142 198 455 630 272 427 300 446
120 153/253 196/325 17.2/11.0 171 1.18 2.6 1.2 137 191 435 610 225 345 257 367
150 124/206 159/265 21.2/13.5 180 1.26 4.3 1.3 131 185 415 590 193 287 229 313
185 99.1/164 128/211 26.6/17.0 193 1.34 4.3 1.3 125 185 400 590 165 237 206 267
240 75.4/125 98/161 34.9/22.3 210 1.45 4.3 1.4 123 179 390 570 140 191 185 226
300 60.1/100 80/130 43.8/28.0 228 1.57 4.3 1.5 116 176 370 560 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 249 1.74 5.8 1.6 110 166 350 530 113 141 164 184
* For capacitance & charging current values, multiply values shown by 1.2 for EPR insulated cables.

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 Caledonian Medium Voltage Cables

Single Core 26/35KV (Um=42KV)

Dimensional Data
Unarmoured Cables Aluminium Wire Armoured Cables
Nom.
Cross- Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Section Insulation Wire Weight Weight
Tape Sheath Overall Bedding Wire Sheath Overall
Area Thickness Thickness Screen Thickness Diameter Thickness Size Thickness Diameter
Area* Cu Al Cu Al
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
50 10.5 0.1 16 2.1 38.3 1689 1402 1.2 2.5 2.5 46.8 2580 2395
70 10.5 0.1 16 2.2 40.2 1980 1564 1.2 2.5 2.5 48.8 2937 2611
95 10.5 0.1 16 2.2 41.8 2283 1714 1.2 2.5 2.6 50.9 3206 2737
120 10.5 0.1 16 2.3 43.4 2588 1871 1.4 2.5 2.6 51.5 3753 3177
150 10.5 0.1 25 2.3 44.9 2923 2028 1.4 2.5 2.7 53.8 4143 3371
185 10.5 0.1 25 2.4 47.3 3415 2281 1.4 2.5 2.7 55.6 4694 3693
240 10.5 0.1 25 2.5 49.5 3975 2542 1.4 2.5 2.8 57.6 5258 4005
300 10.5 0.1 25 2.5 51.9 4625 2822 1.4 2.5 2.9 60.8 5940 4301
400 10.5 0.1 35 2.6 54.9 5704 3288 1.6 2.5 3.0 63.6 7155 4894
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short Short Reactance Inductance Impedance
Circuit Circuit Circuit
Nom.
DC AC Rating Rating of Rating of
Cross- Capaci- Charging
Resistance Resistance of Copper Copper Trefoil Flat spaced
Section tance Current Flat Flat
CU / AL CU / AL Conductor Wire Tape Trefoil Trefoil
Area Spaced Spaced
CU / AL Screen Screen
1 sec 1 sec 1 sec Cu Al Cu Al

mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/ m

50 387/641 494/822 6.8/4.4 126 0.95 2.6 1.2 161 227 510 720 511 834 527 844
70 268/443 343/568 9.8/6.3 138 1.04 2.6 1.2 154 207 490 660 364 583 386 597
95 193/320 248/410 13.3/8.5 151 1.13 2.6 1.3 147 202 470 640 272 427 300 446
120 153/253 196/325 17.2/11.0 161 1.24 2.6 1.3 142 194 450 620 225 345 257 367
150 124/206 159/265 21.2/13.5 169 1.36 4.3 1.4 136 188 430 600 193 287 229 313
185 99.1/164 128/211 26.6/17.0 176 1.40 4.3 1.4 128 188 410 600 165 237 206 267
240 75.4/125 98/161 34.9/22.3 192 1.51 4.3 1.5 128 183 400 580 140 191 185 226
300 60.1/100 80/130 43.8/28.0 209 1.64 4.3 1.6 119 180 380 570 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 227 1.80 5.8 1.7 114 170 360 540 113 141 164 184
* For capacitance & charging current values, multiply values shown by 1.2 for EPR insulated cables.
 Medium Voltage Cables to IEC 60502

Current Rating for Single Core 1.8/3KV(Um=3.6KV ) to 26/35KV(Um=42KV) XLPE Insulation

Nom. Buried direct in Ground Laid in Single Way Duct Laid in Air
Cross-
Trefoil Flat spaced Trefoil Flat Touching Trefoil Flat Touching Flat spaced
Section
Area CU AL CU AL CU AL CU AL CU AL CU AL CU AL
mm² A A A A A A A
10 84 59 87 62 78 55 98 56 103 75 106 77 122 88
16 109 84 113 88 103 80 104 81 125 97 128 99 150 116
25 140 108 144 112 132 102 133 103 163 127 167 130 196 153
35 166 129 172 134 157 122 159 123 198 154 203 157 238 185
50 196 152 203 157 186 144 188 146 238 184 243 189 286 222
70 239 186 246 192 227 176 229 178 296 230 303 236 356 278
95 285 221 293 229 271 210 274 213 361 280 369 287 434 338
120 323 252 332 260 308 240 311 242 417 324 426 332 500 391
150 361 281 366 288 343 267 347 271 473 368 481 376 559 440
185 406 317 410 324 387 303 391 307 543 424 550 432 637 504
240 469 367 470 373 447 351 453 356 641 502 647 511 745 593
300 526 414 524 419 504 397 510 402 735 577 739 586 846 677
400 590 470 572 466 564 451 571 457 845 673 837 676 938 769
500 650 530 672 546 604 504 661 537 935 773 938 776 1118 919
630 700 600 882 646 654 554 771 617 1045 883 1048 886 1318 1089
800 750 660 1002 756 694 594 871 717 1145 983 1148 986 1528 1279
1000 800 720 1112 856 724 644 971 807 1235 1083 1238 1086 1738 1469

Current Rating for Single Core 1.8/3KV(Um=3.6KV) to 26/35KV(Um=42KV) EPR Insulation

Nom. Buried direct in Ground Laid in Single Way Duct Laid in Air
Cross-
Trefoil Flat spaced Trefoil Flat Touching Trefoil Flat Touching Flat spaced
Section
Area CU AL CU AL CU AL CU AL CU AL CU AL CU AL
mm² A A A A A A A
10 81 57 83 58 74 52 94 53 94 68 97 70 110 79
16 106 82 109 84 99 77 100 78 116 90 119 92 138 107
25 136 105 140 109 128 99 129 100 153 119 156 121 181 141
35 162 126 167 130 153 118 154 120 186 144 190 147 221 171
50 192 149 198 153 181 140 183 142 224 174 229 178 266 207
70 234 182 242 188 222 172 224 174 280 218 287 223 334 259
95 280 217 289 224 266 206 269 208 343 266 352 273 409 317
120 319 247 329 256 303 235 306 238 398 309 407 317 474 368
150 357 277 369 287 341 264 344 267 454 352 465 361 540 419
185 403 314 417 325 386 300 390 303 522 406 534 417 621 484
240 467 364 484 377 449 350 454 354 619 483 634 495 736 575
300 526 411 545 426 509 397 515 401 712 556 728 570 843 659
400 597 471 618 487 580 456 588 462 825 651 843 667 977 770
500 657 531 718 567 620 509 678 542 915 751 849 767 1157 920
630 707 601 928 667 670 559 788 622 1025 862 1054 876 1357 1090
800 757 661 1048 777 710 599 888 722 1125 961 1154 977 1567 1280
1000 807 721 1158 877 740 649 988 812 1215 1061 1244 1077 1777 1470

▓▓ Current Rating Conditions:

Ground Temperature: 20°C
Ambient Temperature (air): 30°C
Depth of Soil: 0.8m
Thermal Resistance of Soil: 1.5K•m/W

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 Caledonian Medium Voltage Cables

Three Core Cables to IEC 60502

▓▓ APPLICATIONS:
The three core cables are designed for distribution
of electrical power with nominal voltage Uo/U
ranging from 1.8/3KV to 26/35KV and frequency
50Hz. They are suitable for installation mostly
in power supply stations, indoors and in cable
ducts, outdoors, underground and in water as well
as for installation on cable trays for industries,
switchboards and power stations.

▓▓ STANDARD: PVC/PE/LSZH Oversheath

PVC/PE/LSZH Separation Sheath(optional)
Metallic Screen
Insulation Screen
IEC 60502 Part 1(1.8/3KV) XLPE/EPR/HEPR Insulation
IEC 60502 Part 2(3.6/6KV to 18/30KV) Conductor
Conductor Screen
Binder
▓▓ CONSTRUCTION: Armour(optional)

Conductor: Plain annealed copper or aluminium complying with IEC 60228 class 1 or 2.
Conductor Screen: The conductor screen consists of an extruded layer of non metallic,
semi-conducting compound applied on top of a semi-conducting tape. The conductor screen
is applied under triple extrusion process over the conductor along with the insulation and the
insulation screen. The extruded semi-conducting compound is firmly bonded to the insulation
to exclude all air voids and can be easily hand stripped on site. The conductor screen is not
necessary for both PVC and EPR/HEPR insulated 1.8/3.6KV and 3.6/6KV cables.
Insulation: Insulation is of polyvinyl chloride (PVC) intended for 1.8/3.6KV and 3.6/6KV
cables, cross-linked polyethylene compound (XLPE) or ethylene propylene rubber (EPR/
HEPR).
Table 1. Insulation Thickness Of XLPE Or EPR/HEPR Insulation
Nom. Insulation Thickness at Nom. Voltage
Cross
Section 1.8/3kV 3.6/6kV 6/10KV 8.7/15KV 12/20KV 18/30KV 21/35KV 26/35KV
Area (Um=3.6kV) (Um=7.2kV) (Um=12KV) (Um=17KV) (Um=24KV) (Um=36KV) (Um=42KV) (Um=42KV)
mm² mm mm mm mm mm mm mm mm
XLPE EPR
XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR
Unscreened Screened
10 2.0 2.5 3.0 2.5 - - - - - -
16 2.0 2.5 3.0 2.5 3.4 - - - - -
25 2.0 2.5 3.0 2.5 3.4 4.5 - - - -
35 2.0 2.5 3.0 2.5 3.4 4.5 5.5 - - -
50 – 185 2.0 2.5 3.0 2.5 3.4 4.5 5.5 8.0 9.3 10.5
240 2.0 2.6 3.0 2.6 3.4 4.5 5.5 8.0 9.3 10.5
300 2.0 2.8 3.0 2.8 3.4 4.5 5.5 8.0 9.3 10.5
400 2.0 3.0 3.0 3.0 3.4 4.5 5.5 8.0 9.3 10.5
500 - 1600 2.2-2.8 3.2 3.2 3.2 3.4 4.5 5.5 8.0 9.3 10.5
 Medium Voltage Cables to IEC 60502
Insulaton Screen: The insulation screen consists of an extruded layer of non metallic,
semi-conducting compound extruded over the insulation of each core. The extruded semi-
conducting layer shall consist of bonded or cold strippable semi-conducting compound
capable of removal for jointing or terminating. As an option, a semi-conducting tape may be
applied over the individual cores or core assembly as a bedding for the metallic layer. The
minimum thickness is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen
is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site.
The insulation screen is not necessary for both PVC and EPR/HEPR insulated 1.8/3.6KV and
3.6/6KV cables. The screen may be covered by semi-conductive water blocking swellable
tape to ensure longitudinal watertightness.
Inner Covering & Fillers: For cables with a collective metallic layer or cables with a metallic
layer over each individual cores with additional collective metallic layers, semi-conducting
inner covering and fillers shall be applied over the laid up cores. The inner covering and fillers
are made of non hygroscopic material like polypropylene, except if the cable is to be made
longitudinally watertight. The inner covering is extruded in general but may be lapped if the
interstices between the cores are filled.
The approximate thickness of extruded inner coverings is given in Table 2:

Table 2. Approximate Thickness Of Extruded Inner Coverings

Ficititous Diameter Over Laid Up Cores Approx. Thickress of Extruded Inner Covering
mm mm
> <
- 25 1.0
25 35 1.2
35 45 1.4
45 60 1.6
60 80 1.8
80 - 2.0
*The approximate thickness of lapped inner coverings shall be 0.4mm for fictitious diameters over the laid up cores up to and including
40mm and 0.6mm for larger diameter.

Metallic Layer: The metallic layer may be applied over the individual cores or the core
assembly collectively. The following types of metallic layers are provided:

1) Metallic Screen
2) Concentric Conductor
3) Metallic Sheath
4) Metallic Armour

The metallic screen shall consist of either copper tapes or a concentric layer of copper wires
or a combination of tapes and wires. The concentric conductor is applied directly over the
inner covering. The metallic sheath consists of lead or lead alloy applied as a tightly fitting
seamless tube. The metallic armour consists of either flat wire armour, round wire armour,
and double tape armour.

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 Caledonian Medium Voltage Cables
Table 3. Minimum Total Cross Section Of Metallic Screen
Nom. Cross-Section Min. Cross-Section
DC Resistance of the Copper Wire Screen
Area of Cable of Metallic Screen
mm² mm² mm
up to 120 16 1.06
150-300 25 0.72
400-630 35 0.51
800-1000 50 0.35

Separation Sheath (for armoured cable): The separation sheath comprises a layer of
extruded PVC, PE or LSZH applied over the laid up cores under the armour. PVC is normally
of grade ST2 and PE of grade ST7. The nominal thickness is calculated by 0.02Du + 0.6mm
where Du is the fictitious diameter under the sheath in mm. For cables without a lead sheath,
the nominal separation sheath thickness shall not be less than 1.2mm. For cables where the
separation sheath is applied over the lead sheath, the nominal separation sheath thickness
shall not be less than 1.0mm.

Tabel 4. Separation Thickness

Approx. Thickress of
Cores Diameter
Inner Sheath
mm mm
> <
35 45 1.4
45 60 1.6
60 80 1.8
80 - 2.0

Lapped Bedding (for armoured lead sheathed cable): The lapped bedding applied to
the lead sheath consists of either impregnated/synthetic compounded paper tapes or a
combination of two layers of these paper tapes followed by a few layers of compounded
fabulous materials. The thickness is around 1.5mm.

Armour (for armoured cable): The armour is applied over the inner covering helically. It
consists of either flat galvanized steel wire armour (strip), round galvanized steel wire armour,
and double steel tape armour.

Table 5. Round Armour Wire Diameter

Fictitious Diameter Under the Armour Armour Wire Diameter

mm mm
> <
- 10 1.25
10 15 1.25
15 25 1.6
25 35 2.0
35 60 2.5
60 - 3.15
 Medium Voltage Cables to IEC 60502
Table 6. Armour Tape Thickness
Fictitious Diameter Under the Armour Galvanized Steel / Steel Aluminum / Aluminium Alloy

mm mm mm
> <
- 30 0.2 0.5
30 70 0.5 0.5
70 - 0.8 0.8

For flat wire armour and fictitious diameter under the armour greater than 15mm, the nominal
thickness of the flat steel wire diameter shall be 0.8mm.Cables with fictitious diameter under
the armour up to and including 15mm, flat wire armour will not be used. The tape armour is
applied helically in two layers so that the outer tape is approximately central over the gap
of the inner tape. If tape armour is used, the inner covering shall be reinforced by taped
bedding.

Over Sheath: Overall sheath comprises a layer of extruded either thermoplastic compound
(PVC ST3 type or PE ST7 type) or elastomeric compound (polychlorprene CSP or
chlorosulfonated PE). The nominal oversheath thickness is calculated by 0.035D+1 where D
is the fictitiuous diameter immediately under the oversheath in mm. For unarmoured cables
and cables with the oversheath not applied over the armour, metallic screen or concentric
conductor, the nominal oversheath thickness shall not be less than 1.4mm. And for cables
with oversheath applied over the armour, metallic screen or concentric conductor, the nominal
oversheath thickness shall not be less than 1.8mm.

▓▓ PHYSICAL PROPERTIES:

Operating Temperature: up to 70°C (PVC insulation); up to 90°C (XLPE or EPR insulation)

Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature( 5 seconds maximum duration ): 140-160 °C (PVC insulation);
250°C (XLPE or EPR insulation)
Bending Radius: 15 x OD

Table 7. Nominal /Operating /Testing Voltages

Rated Voltage Uo/U Operating Voltage (Um) Testing Voltage (rms)
1.8/3KV 3.6KV 6.5KV
3.6/6KV 7.2KV 12.5KV
6/10KV 12KV 21KV
8.7/15KV 17.5KV 30.5KV
12/20KV 24KV 42KV
18/30KV 36KV 63KV
21/35KV 42KV 73.5(53)*KV
26/35KV 42KV 91(65)*KV
*21/35KV and 26/35kV power frequency voltage test can be made under the following conditions: 2.5Uo x 30mins or 3.0Uo x 15mins.
Numbers in brackets refer to the test values for 3.0Uo x 1.5mins.

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 Caledonian Medium Voltage Cables

Three Core 1.8/3KV (Um=3.6KV)

Dimensional Data
Unarmoured Cables Steel Round-Wire Armoured Cables
Nom. Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Cross- Wire Weight Weight
Insulation Tape Sheath Overall Bedding Wire Sheath Overall
Section Screen
Thickness Thickness Thickness Diameter CU AL Thickness Size Thickness Diameter CU AL
Area Area*
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
10 2.0 0.1 16 1.8 23 650 460 1.2 1.6 1.8 28 1480 1290
16 2.0 0.1 16 1.8 24 840 540 1.2 1.6 1.9 29 1720 1410
25 2.0 0.1 16 1.8 26 1160 680 1.2 1.6 1.9 32 2130 1650
35 2.0 0.1 16 1.8 29 1490 820 1.2 2.0 2.1 36 2810 2140
50 2.0 0.1 16 1.9 32 1900 1000 1.2 2.0 2.2 39 3340 2450
70 2.0 0.1 16 2.0 36 2580 1290 1.2 2.0 2.3 42 4200 2910
95 2.0 0.1 16 2.2 40 3440 1640 1.3 2.5 2.4 47 5620 3820
120 2.0 0.1 16 2.3 43 4220 1950 1.3 2.5 2.5 51 6580 4310
150 2.0 0.1 25 2.4 46 5090 2290 1.4 2.5 2.7 54 7680 4870
185 2.0 0.1 25 2.5 50 6240 2730 1.5 2.5 2.8 58 9060 5560
240 2.0 0.1 25 2.7 56 8030 3430 1.6 2.5 3.0 64 11200 6600
300 2.0 0.1 25 2.8 60 9890 4100 1.6 2.5 3.1 69 13590 7500
400 2.0 0.1 35 3.1 68 12530 5150 1.8 3.15 3.4 78 17260 9880
500 2.2 0.1 35 3.3 75.7 16680 7510 1.8 3.15 3.5 84.3 21780 13025
630 2.4 0.1 35 3.5 84.9 21770 10040 1.8 3.15 3.8 94.6 27400 16050
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Steel Flat Wire Armoured Cables Double Steel Tape Armoured Cables

Nom. Approx. No of Steel Approx.

Nom. Armour Approx. Weight Nom. Nom. Approx. Weight
Cross- Nom.Sheath Tapes x Nom
Bedding Wire Overall Bedding Sheath Overall
Section Thickness Tape
Thickness Size Diameter CU AL Thickness Thickness Diameter CU AL
Area Thickness

mm² mm mm mm mm kg/km mm mm mm mm kg/km

10 1.2 0.8 1.8 24.5 1245 1065 1.2 2 x 0.2 1.8 23.6 925 750
16 1.2 0.8 1.8 27.1 1565 1280 1.2 2 x 0.2 1.8 26.2 1205 925
25 1.2 0.8 1.8 29.7 1975 1525 1.2 2 x 0.2 1.9 29.0 1590 1145
35 1.2 0.8 1.9 32.5 2420 1805 1.2 2 x 0.2 1.9 31.6 1985 1370
50 1.2 0.8 2.0 35 2860 2080 1.2 2 x 0.2 2.0 34.1 2400 1605
70 1.2 0.8 2.1 38.7 3685 2525 1.2 2 x 0.5 2.2 39.5 3570 2410
95 1.3 0.8 2.2 42.9 4695 3080 1.3 2 x 0.5 2.3 43.7 4570 2950
120 1.3 0.8 2.3 46.4 5650 3585 1.3 2 x 0.5 2.4 46.1 5510 3440
150 1.4 0.8 2.4 49.6 6630 4085 1.4 2 x 0.5 2.6 50.6 6500 3955
185 1.5 0.8 2.6 54.1 7990 4820 1.5 2 x 0.5 2.7 54.9 7825 4650
240 1.6 0.8 2.7 59.2 10060 5790 1.6 2 x 0.5 2.8 60.0 9825 5600
300 1.6 0.8 2.9 64.6 12230 6865 1.6 2 x0.5 3.0 65.4 12030 6660
400 1.8 0.8 3.1 71.0 15200 8280 1.8 2 x 0.5 3.2 71.8 14970 8055
500 1.8 0.8 3.3 79.5 19090 10255 1.8 2 x 0.8 3.5 80.5 18880 10035
630 1.8 0.8 3.6 89.8 24400 12920 1.8 2 x 0.8 3.8 92.3 25070 13620
 Medium Voltage Cables to IEC 60502

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Capaci- Charging Copper Wire Copper Tape
Resistance Resistance Conductor Reactance Inductance
Section tance Current Screen Per Screen Per
CU / AL CU / AL CU / AL
Area Core Core
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m
10 1830/3080 2330/3920 1.4/0.9 160 0.25 2.6 0.4 101 390
16 1150/1910 1460/2420 2.2/1.4 180 0.27 2.6 0.4 98 370
25 727/1200 929/1538 3.6/2.3 220 0.29 2.6 0.4 95 350
35 524/868 668/1113 5.0/3.2 250 0.31 2.6 0.5 92 330
50 387/641 494/822 6.8/4.4 270 0.33 2.6 0.5 88 310
70 268/443 343/568 9.8/6.3 310 0.35 2.6 0.6 84 290
95 193/320 248/410 13.3/8.5 350 0.38 2.6 0.6 81 270
120 153/253 196/325 17.2/11.0 380 0.46 2.6 0.7 79 250
150 124/206 159/265 21.2/13.5 420 0.50 2.6 0.7 77 260
185 99.1/164 128/211 26.6/17.0 460 0.56 2.6 0.8 76 250
240 75.4/125 98/161 34.9/22.3 510 0.61 4.3 0.9 74 240
300 60.1/100 80/130 43.8/28.0 570 0.68 4.3 1.0 73 250
400 47.0/77.8 64/102 57.3/36.6 590 0.70 5.8 1.1 71 240
500 36.6/60.5 57/81 72.3/46.2 610 0.72 5.8 1.2 69 230
630 28.3/46.9 42/64 91.2/58.3 630 0.74 5.8 1.3 67 220

Three Core 3.8/6.6KV (Um=7.2KV)

Dimensional Data
Unarmoured Cables Steel Round-Wire Armoured Cables

Nom. Copper Approx.

Nom. Copper Nom. Approx. Approx.Weight Nom. Armour Nom. Approx. Weight
Cross- Wire
Insulation Tape Sheath Overall Bedding Wire Sheath Overall
Section Screen
Thickness Thickness Thickness Diameter CU AL Thickness Size Thickness Diameter CU AL
Area Area*

mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km

10 2.5 0.1 16 2.0 30 980 790 1.2 2.0 2.1 36 2310 2120
16 2.5 0.1 16 2.0 31 1190 890 1.2 2.0 2.2 38 2600 2290
25 2.5 0.1 16 2.1 34 1560 1080 1.2 2.0 2.3 41 3080 2600
35 2.5 0.1 16 2.2 37 1930 1270 1.3 2.5 2.4 45 3950 3280
50 2.5 0.1 16 2.3 40 2370 1480 1.3 2.5 2.5 47 4530 3630
70 2.5 0.1 16 2.4 43 3110 1820 1.4 2.5 2.6 51 5510 4210
95 2.5 0.1 16 2.5 47 4000 2200 1.5 2.5 2.8 55 6660 4860
120 2.5 0.1 16 2.6 50 4820 2550 1.5 2.5 2.9 59 7630 5360
150 2.5 0.1 25 2.8 54 5770 2970 1.6 2.5 3.0 62 8800 6000
185 2.5 0.1 25 2.9 58 6960 3460 1.6 2.5 3.1 66 10180 6670
240 2.6 0.1 25 3.1 65 8940 4340 1.8 3.15 3.4 75 13480 8870
300 2.8 0.1 25 3.3 70 10980 5190 1.9 3.15 3.6 81 15920 10130
400 3.0 0.1 35 3.5 79 13820 6440 2.0 3.5 3.9 90 19980 12590
500 3.2 0.1 35 3.7 87 19100 10755 2.1 3.5 4.1 98 24160 14820
630 3.2 0.1 35 4.0 95 30470 13150 2.2 3.5 4.4 107 29650 17710
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

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 Caledonian Medium Voltage Cables

Steel Flat Wire Armoured Cables Double Steel Tape Armoured Cables

Nom. Approx. No of Steel Approx.

Nom. Armour Nom. Approx. Weight Nom. Nom. Approx. Weight
Cross- tapes x
Bedding Wire Sheath Overall Bedding Sheath Overall
Section nom tape
Thickness Size Thickness Diameter CU AL Thickness Thickness Diameter CU AL
Area thickness

mm² mm mm mm mm kg/km mm mm mm mm kg/km

10 1.2 0.8 1.8 26.9 1415 1235 1.2 2X0.2 1.8 26 1060 885
16 1.2 0.8 1.8 29.2 1725 1445 1.2 2X0.2 1.8 28.3 1340 1055
25 1.2 0.8 1.9 32.2 2165 1735 1.2 2X0.2 1.9 31.3 1735 1305
35 1.3 0.8 2.0 35.0 2645 2025 1.3 2X0.2 2.0 34.1 2170 1555
50 1.3 0.8 2.1 37.4 3075 2295 1.3 2X0.5 2.1 38.0 2950 2170
70 1.4 0.8 2.2 41.0 3915 2755 1.4 2X0.5 2.3 41.8 3795 2635
95 1.5 0.8 2.3 45.3 4840 3335 1.5 2X0.5 2.4 46.1 4810 3200
120 1.5 0.8 2.4 48.7 5915 3855 1.5 2X0.5 2.5 49.5 5770 3705
150 1.6 0.8 2.5 52.1 6930 4395 1.6 2X0.5 2.6 52.9 6775 4235
185 1.6 0.8 2.6 56.2 8265 5100 1.6 2X0.5 2.8 57.2 8120 4950
240 1.8 0.8 2.8 62.2 10440 6220 1.8 2X0.5 2.9 63.0 10250 6025
300 1.9 0.8 3.0 68.2 12780 7420 1.9 2X0.5 3.1 69.0 12570 7200
400 2.0 0.8 3.3 75.9 15970 9110 2.0 2X0.5 3.4 76.7 15740 8870
500 2.1 0.8 3.5 84.2 19940 11130 2.1 2X0.8 3.6 86.5 20550 11750
630 2.2 0.8 3.7 93.5 25120 13670 2.2 2X0.8 3.9 96.0 25830 14400

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Capaci- Charging Copper Wire Copper Tape
Resistance Resistance Conductor Reactance Inductance
Section tance Current Screen Per Screen Per
CU / AL CU / AL CU / AL
Area Core Core
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m
10 1830/3080 2330/3920 1.4/0.9 212 0.27 2.6 0.4 132 410
16 1150/1910 1470/2420 2.2/1.4 242 0.30 2.6 0.4 124 390
25 727/1200 927/1538 3.6/2.3 272 0.33 2.6 0.4 116 370
35 524/868 668/1113 5.0/3.2 301 0.36 2.6 0.5 108 350
50 387/641 494/822 6.8/4.4 332 0.40 2.6 0.5 102 330
70 268/443 343/568 9.8/6.3 383 0.46 2.6 0.6 97 310
95 193/320 248/410 13.3/8.5 432 0.52 2.6 0.6 92 290
120 153/253 196/325 17.2/11.0 474 0.57 2.6 0.7 89 280
150 124/206 159/265 21.2/13.5 511 0.61 4.3 0.7 87 280
185 99.1/164 128/211 26.6/17.0 562 0.67 4.3 0.8 86 270
240 75.4/125 98/161 34.9/22.3 602 0.72 4.3 0.9 83 260
300 60.1/100 80/130 43.8/28.0 622 0.75 4.3 1.0 82 260
400 47.0/77.8 64/102 57.3/36.6 648 0.78 5.8 1.1 80 250
500 36.6/60.5 51/81 72.3/46.2 668 0.82 5.8 1.2 78 250
630 28.3/46.9 42/64 91.2/58.3 758 0.92 5.8 1.3 76 240
 Medium Voltage Cables to IEC 60502

Three Core 6/10KV (Um=12KV)

Dimensional Data
Unarmoured Cables Steel Round-Wire Armoured Cables

Nom. Copper Approx. Approx.

Nom. Copper Nom. Approx. Weight Nom. Armour Nom. Approx Weight
Cross- Wire
Insulation Tape Sheath Overall Bedding Wire Sheath Overall
Section Screen
Thickness Thickness Thickness Diameter CU AL Thickness Size Thickness Diameter CU AL
Area Area*

mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km

16 3.4 0.1 16 2.2 36 1410 1110 1.2 2.0 2.4 42 3000 2700
25 3.4 0.1 16 2.3 39 1800 1320 1.3 2.5 2.5 46 3900 3430
35 3.4 0.1 16 2.3 41 2170 1500 1.3 2.5 2.6 49 4430 3770
50 3.4 0.1 16 2.4 44 2630 1730 1.4 2.5 2.7 52 5080 4190
70 3.4 0.1 16 2.6 48 3400 2110 1.5 2.5 2.8 56 6050 4750
95 3.4 0.1 16 2.7 52 4310 2510 1.5 2.5 2.9 60 7180 5380
120 3.4 0.1 16 2.8 55 5150 2890 1.6 2.5 3.0 63 8230 5960
150 3.4 0.1 25 2.9 58 6100 3300 1.7 2.5 3.1 67 9380 6580
185 3.4 0.1 25 3.0 62 7310 3810 1.7 3.15 3.3 72 11610 8110
240 3.4 0.1 25 3.2 69 9290 4680 1.8 3.15 3.5 79 14110 9510
300 3.4 0.1 25 3.3 73 11240 5450 1.9 3.15 3.7 84 16420 10630
400 3.4 0.1 35 3.6 81 14040 6660 2.0 3.5 3.9 92 20620 12880
500 3.4 0.1 35 3.7 88 17830 8450 2.1 3.5 4.0 99. 25090 16530
630 3.4 0.1 35 3.9 96 20030 10895 2.2 3.5 4.1 109 30880 19670
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Steel Flat Wire Armoured Cables Double Steel Tape Armoured Cables

Nom. Approx. No of Steel Approx.

Nom. Armour Nom. Approx. Weight Nom. Nom. Approx. Weight
Cross- tapes x
Bedding Wire Sheath Overall Bedding Sheath Overall
Section nom tape
Thickness Size Thickness Diameter CU AL Thickness Thickness Diameter CU AL
Area thickness

mm² mm mm mm mm kg/km mm mm mm mm kg/km

16 1.2 0.8 2.2 39.7 2795 2515 1.2 2x0.5 2.3 40.5 2680 2395
25 1.3 0.8 2.2 42.7 3305 2885 1.3 2x0.5 2.4 43.7 3195 2775
35 1.3 0.8 2.3 45.2 3835 3215 1.3 2x0.5 2.5 46.2 3720 3100
50 1.4 0.8 2.4 47.8 4325 3570 1.4 2x0.5 2.6 48.8 4200 3445
70 1.5 0.8 2.5 51.8 5320 4185 1.5 2x0.5 2.7 52.8 5185 4050
95 1.5 0.8 2.7 56.1 6450 4875 1.5 2x0.5 2.8 56.9 6280 4700
120 1.6 0.8 2.8 59.7 7545 5510 1.6 2x0.5 2.9 60.5 7360 5325
150 1.7 0.8 2.9 63.1 8610 6150 1.7 2x0.5 3.0 63.9 8420 5950
185 1.7 0.8 3.0 67.4 10120 6995 1.7 2x0.5 3.1 68.2 9910 6780
240 1.8 0.8 3.2 73.0 12430 8205 1.8 2x0.5 3.3 73.8 12200 7970
300 1.9 0.8 3.3 78.3 14775 9455 1.9 2x0.5 3.4 79.1 14530 9200
400 2.0 0.8 3.5 85.2 17950 11190 2.0 2x0.8 3.7 87.7 18600 11850
500 2.1 0.8 3.7 92.8 21970 13270 2.1 2x0.8 3.9 95.3 22680 13990
630 2.2 0.8 4.0 102.7 27480 16160 2.2 2x0.8 4.1 105.0 28200 16910

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 Caledonian Medium Voltage Cables

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Capaci- Charging Copper Wire Copper Wire
Resistance Resistance Conductor Reactance Inductance
Section tance Current Screen Per Screen Per
CU / AL CU / AL CU / AL
Area Core Core
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m
16 1150/1910 1470/2420 2.2/1.4 186 0.40 2.6 0.5 131 410
25 727/1200 927/1538 3.6/2.3 216 0.43 2.6 0.5 123 390
35 524/868 668/1113 5.0/3.2 237 0.47 2.6 0.6 115 370
50 387/641 494/822 6.8/4.4 266 0.52 2.6 0.6 109 350
70 268/443 343/568 9.8/6.3 298 0.60 2.6 0.7 103 330
95 193/320 248/410 13.3/8.5 334 0.67 2.6 0.7 99 320
120 153/253 196/325 17.2/11.0 365 0.73 2.6 0.8 96 310
150 124/206 159/265 21.2/13.5 392 0.78 4.3 0.8 93 300
185 99.1/164 128/211 26.6/17.0 430 0.86 4.3 0.9 90 290
240 75.4/125 98/161 34.9/22.3 476 0.95 4.3 0.9 87 280
300 60.1/100 80/130 43.8/28.0 524 1.05 4.3 1.0 85 270
400 47.0/77.8 64/102 57.3/36.6 580 1.16 5.8 1.1 81 260
500 36.6/60.5 51/81 72.3/46.2 630 1.26 5.8 1.2 78 250
630 28.3/46.9 42/64 91.2/58.3 690 1.36 5.8 1.3 76 240
 Medium Voltage Cables to IEC 60502

Three Core 8.7/15KV (Um=17.5KV)

Dimensional Data
Unarmoured Cables Steel Round-Wire Armoured Cables

Nom. Copper Approx. Approx.

Nom. Copper Nom. Approx. Weight Nom. Armour Nom. Approx. Weight
Cross- Wire
Insulation Tape Sheath Overall Bedding Wire Sheath Overall
Section Screen
Thickness Thickness Thickness Diameter CU AL Thickness Size Thickness Diameter CU AL
Area Area*

mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km

25 4.5 0.1 16 2.4 44 2100 1620 1.4 2.5 2.7 52 4560 4080
35 4.5 0.1 16 2.5 46 2510 1840 1.4 2.5 2.7 54 5080 4410
50 4.5 0.1 16 2.6 49 2980 2080 1.5 2.5 2.9 57 5740 4840
70 4.5 0.1 16 2.7 53 3760 2470 1.6 2.5 3.0 62 6770 5480
95 4.5 0.1 16 2.8 57 4700 2900 1.6 2.5 3.1 65 7890 6100
120 4.5 0.1 16 3.0 60 5590 3320 1.7 2.5 3.2 69 8970 6700
150 4.5 0.1 25 3.1 64 6560 3760 1.8 3.15 3.4 74 11030 8220
185 4.5 0.1 25 3.2 67 7800 4300 1.8 3.15 3.5 78 12490 8980
240 4.5 0.1 25 3.4 74 9820 5220 1.9 3.15 3.7 84 15040 10440
300 4.5 0.1 25 3.5 79 11800 6010 2.0 3.5 3.8 90 17920 12130
400 4.5 0.1 35 3.7 86 14620 7240 2.1 3.5 4.1 98 21360 13970
500 4.5 0.1 35 3.8 93 18160 9355 2.2 3.5 4.3 106 26490 17830
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Steel Flat Wire Armoured Cables Double Steel Tape Armoured Cables

Nom. Approx. No of Steel Approx.

Nom. Armour Nom. Approx. Weight Nom. Nom. Approx. Weight
Cross- tapes x
Bedding Wire Sheath Overall Bedding Sheath Overall
Section Nom Tape
Thickness Size Thickness Diameter CU AL Thickness Thickness Diameter CU AL
Area Thickness

mm² mm mm mm mm kg/km mm mm mm mm kg/km

25 1.4 0.8 2.4 48.0 3915 3495 1.4 2x0.5 2.5 48.8 3770 3345
35 1.4 0.8 2.5 50.8 4510 3890 1.4 2x0.5 2.6 51.6 4350 3735
50 1.5 0.8 2.6 53.3 5020 4270 1.5 2x0.5 2.7 54.1 4855 4105
70 1.6 0.8 2.7 57.0 5990 4870 1.6 2x0.5 2.8 57.8 5815 4690
95 1.6 0.8 2.8 61.2 7170 5600 1.6 2x0.5 3.0 62.2 7010 5435
120 1.7 0.8 2.9 65.1 8340 6320 1.7 2x0.5 3.1 66.1 8170 6145
150 1.8 0.8 3.0 68.3 9440 6955 1.8 2x0.5 3.2 69.3 9260 6770
185 1.8 0.8 3.2 72.8 10990 7880 1.8 2x0.5 3.3 73.6 10760 7650
240 1.9 0.8 3.3 78.3 13370 9155 1.9 2x0.5 3.4 79.1 13120 8900
300 2.0 0.8 3.5 83.7 15760 10460 2.0 2x0.8 3.6 86.0 16360 11070
400 2.1 0.8 3.7 90.5 19050 12260 2.1 2x0.8 3.9 93.0 19750 12960
500 2.2 0.8 3.9 98.2 23160 14430 2.2 2x0.8 4.1 100.7 23900 15190

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 Caledonian Medium Voltage Cables

Electrical Data
Short Circuit
Short Circuit Short Circuit
Nom. Rating of
DC AC Rating of Rating of Copper
Cross- Charging Copper Tape
Resistance Resistance Conductor Capacitance Wire Screen Reactance Inductance
Section Current Screen Per
CU / AL CU / AL CU / AL Per Core
Area Core
1 sec 1 sec
1 sec
mm² µΩm µΩ/m kA pF/m mA/m kA kA µΩm nH/m
25 727/1200 927/1538 3.6/2.3 176 0.48 2.6 0.6 132 410
35 524/868 668/1113 5.0/3.2 193 0.53 2.6 0.6 123 390
50 387/641 494/822 6.8/4.4 211 0.58 2.6 0.7 116 370
70 268/443 343/568 9.8/6.3 240 0.65 2.6 0.7 110 350
95 193/320 248/410 13.3/8.5 267 0.73 2.6 0.8 105 330
120 153/253 196/325 17.2/11.0 291 0.79 2.6 0.8 102 320
150 124/206 159/265 21.2/13.5 312 0.85 4.3 0.9 98 310
185 99.1/164 128/211 26.6/17.0 340 0.93 4.3 0.9 95 300
240 75.4/125 98/161 34.9/22.3 375 1.02 4.3 1.0 91 290
300 60.1/100 80/130 43.8/28.0 411 1.12 4.3 1.1 89 280
400 47.0/77.8 64/102 57.3/36.6 454 1.24 5.8 1.2 84 270
500 36.6/60.5 51/81 72.3/46.2 504 1.34 5.8 1.3 78 250

Three Core12/20KV (Um=24KV)

Dimensional Data
Unarmoured Cables Steel Round-Wire Armoured Cables

Nom. Copper Approx. Approx.

Nom. Copper Nom. Approx. Weight Nom. Armour Nom. Approx. Weight
Cross- Wire
Insulation Tape Sheath Overall Bedding Wire Sheath Overall
Section Screen
Thickness Thickness Thickness Diameter CU AL Thickness Size Thickness Diameter CU AL
Area Area*

mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km

35 5.5 0.1 16 2.7 51 2850 2180 1.5 2.5 2.9 60 5700 5010
50 5.5 0.1 16 2.8 54 3340 2450 1.6 2.5 3.0 62 6370 5480
70 5.5 0.1 16 2.9 58 4150 2850 1.6 2.5 3.1 66 7370 6070
95 5.5 0.1 16 3.0 62 5110 3310 1.7 3.15 3.3 72 9400 7600
120 5.5 0.1 16 3.1 65 5990 3730 1.8 3.15 3.4 75 10530 8270
150 5.5 0.1 25 3.2 68 6980 4180 1.8 3.15 3.5 80 11800 8940
185 5.5 0.1 25 3.3 72 8240 4740 1.9 3.15 3.7 83 13350 9850
240 5.5 0.1 25 3.6 79 10310 5700 2.0 3.5 3.8 90 16430 11820
300 5.5 0.1 25 3.7 84 12360 6570 2.1 3.5 4.0 95 18870 13080
400 5.5 0.1 35 3.9 91 15220 7830 2.2 4.0 4.3 103 23260 15930
500 5.5 0.1 35 4.1 97 19105 10325 2.3 4.2 4.5 110 27800 19170
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.
 Medium Voltage Cables to IEC 60502

Steel Flat Wire Armoured Cables Double Steel Tape Armoured Cables

Nom. Approx. No of Steel Approx.

Nom. Armour Nom. Approx. Weight Nom. Nom. Approx. Weight
Cross- tapes x
Bedding Wire Sheath Overall Bedding Sheath Overall
Section nom tape
Thickness Size Thickness Diameter CU AL Thickness Thickness Diameter CU AL
Area thickness

mm² mm mm mm mm kg/km mm mm mm mm kg/km

35 1.5 0.8 2.7 55.7 5150 4530 1.5 2x0.5 2.8 56.5 4975 4355
50 1.6 0.8 2.8 58.2 5675 4935 1.6 2x0.5 2.9 59.0 5495 4750
70 1.6 0.8 2.9 61.9 6685 5570 1.6 2x0.5 3.0 62.7 6490 5375
95 1.7 0.8 3.0 66.4 7945 6390 1.7 2x0.5 3.1 67.2 7735 6180
120 1.8 0.8 3.1 70.0 9110 7103 1.8 2x0.5 3.2 70.8 8890 6880
150 1.8 0.8 3.2 73.2 10240 7770 1.8 2x0.5 3.3 74.0 10010 7535
185 1.9 0.8 3.3 77.7 11840 8750 1.9 2x0.5 3.4 78.5 11600 8500
240 2.0 0.8 3.5 83.2 14270 10070 2.0 2x0.8 3.6 85.5 14870 10680
300 2.1 0.8 3.6 88.6 16730 11440 2.1 2x0.8 3.8 91.1 17400 12130
400 2.2 0.8 3.9 95.6 20130 13350 2.2 2x0.8 4.0 97.9 20820 14050
500 2.3 0.8 4.1 103.3 24310 15600 2.3 2x0.8 4.2 105.6 25050 16350

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Capaci- Charging Copper Wire Copper Tape
Resistance Resistance Conductor Reactance Inductance
Section tance Current Screen Per Screen Per
CU / AL CU / AL CU / AL
Area Core Core
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m
35 524/868 668/1113 5.0/3.2 168 0.67 2.6 0.7 129 410
50 387/641 494/822 6.8/4.4 183 0.73 2.6 0.8 122 390
70 268/443 343/568 9.8/6.3 207 0.83 2.6 0.8 115 370
95 193/320 248/410 13.3/8.5 229 0.92 2.6 0.9 110 350
120 153/253 196/325 17.2/11.0 249 1.00 2.6 0.9 106 340
150 124/206 159/265 21.2/13.5 266 1.06 4.3 1.0 103 330
185 99.1/164 128/211 26.6/17.0 289 1.16 4.3 1.0 100 320
240 75.4/125 98/161 34.9/22.3 318 1.27 4.3 1.1 95 300
300 60.1/100 80/130 43.8/28.0 348 1.39 4.3 1.2 93 290
400 47.0/77.8 64/102 57.3/36.6 388 1.53 5.8 1.3 87 280
500 36.6/60.5 51/81 72.3/46.2 422 1.67 5.8 1.4 78 250

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 Caledonian Medium Voltage Cables

Three Core 18/30KV (Um=36KV)

Dimensional Data
Unarmoured Cables Steel Round-Wire Armoured Cables
Nom. Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Cross- Wire Weight Weight
Insulation Tape Sheath Overall Bedding Wire Sheath Overall
Section Screen
Thickness Thickness Thickness Diameter CU AL Thickness Size Thickness Diameter CU AL
Area Area*
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
50 8.0 0.1 16 3.2 65 4340 3460 1.8 3.15 3.5 75 8950 8080
70 8.0 0.1 16 3.3 70 5220 3930 1.9 3.15 3.6 80 10150 8860
95 8.0 0.1 16 3.4 74 6240 4440 1.9 3.15 3.7 84 11390 9590
120 8.0 0.1 16 3.5 77 7180 4910 2.0 3.5 3.8 89 13200 10860
150 8.0 0.1 25 3.6 80 8220 5420 2.1 3.5 4.0 92 14520 11720
185 8.0 0.1 25 3.7 84 9540 6040 2.1 4.0 4.1 97 17020 13510
240 8.0 0.1 25 3.9 91 11720 7110 2.2 4.0 4.3 104 19810 15200
300 8.0 0.1 25 4.0 95 13790 8000 2.3 4.5 4.5 108 23310 17470
400 8.0 0.1 35 4.3 103 16820 9430 2.4 4.5 4.7 117 27010 19620
500 8.0 0.1 35 4.5 110 21550 12880 2.5 4.5 4.9 124 31130 22610
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Steel Flat Wire Armoured Cables Double Steel Tape Armoured Cables
Nom. Approx. No of Steel Approx.
Nom. Armour Nom. Approx. Nom. Nom. Approx.
Cross- Weight tapes x Weight
Bedding Wire Sheath Oveall Bedding Sheath Overall
Section nom tape
Thickness Size Thickness Diameter CU AL Thickness Thickness Diameter CU AL
Area thickness
mm² mm mm mm mm kg/km mm mm mm mm kg/km
50 1.8 0.8 3.1 70.2 7490 6775 1.8 2x0.5 3.3 71.2 7300 6585
70 1.9 0.8 3.2 74.0 8590 7540 1.9 2x0.5 3.4 75.0 8390 7335
95 1.9 0.8 3.4 78.5 9990 8460 1.9 2x0.5 3.5 79.3 9740 8210
120 2.0 0.8 3.5 82.2 11250 9270 2.0 2x0.8 3.6 84.5 11845 9875
150 2.1 0.8 3.6 85.6 12510 10070 2.1 2x0.8 3.7 87.9 13120 10700
185 2.1 0.8 3.7 89.8 14155 11100 2.1 2x0.8 3.9 92.3 14850 11800
240 2.2 0.8 3.8 95.4 16740 12575 2.2 2x0.8 4.0 97.9 17480 13320
300 2.3 0.8 4.0 100.9 19310 14120 2.3 2x0.8 4.2 103.4 20080 14900
400 2.4 0.8 4.2 107.8 22840 16170 2.4 2x0.8 4.4 110.3 23660 17000
500 2.5 0.8 4.4 115.5 27200 18610 2.5 2x0.8 4.6 118.0 28080 19510

Electrical Data
Short Circuit Short Circuit Short Circuit
Nom.
DC AC Rating of Rating of Rating of
Cross- Charging
Resistance Resistance Conductor Capacitance Copper Wire Copper Tape Reactance Inductance
Section Current
CU / AL CU / AL CU / AL Screen Per Screen Per
Area
1 sec Core 1 sec Core 1 sec

mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m

50 387/641 494/822 6.8/4.4 142 0.85 2.6 1.0 134 430
70 268/443 343/568 9.8/6.3 159 0.95 2.6 1.0 127 400
95 193/320 248/410 13.3/8.5 175 1.05 2.6 1.1 121 390
120 153/253 196/325 17.2/11.0 189 1.13 2.6 1.1 117 370
150 124/206 159/265 21.2/13.5 201 1.21 4.3 1.2 113 360
185 99.1/164 128/211 26.6/17.0 217 1.3 4.3 1.2 109 350
240 75.4/125 98/161 34.9/22.3 237 1.42 4.3 1.3 104 330
300 60.1/100 80/130 43.8/28.0 258 1.55 4.3 1.4 101 320
400 47.0/77.8 64/102 57.3/36.6 282 1.69 5.8 1.5 96 290
500 36.6/60.5 51/81 72.3/46.2 302 1.79 5.8 1.6 78 250
 Medium Voltage Cables to IEC 60502

Three Core 21/35KV (Um=42KV)

Dimensional Data
Unarmoured Cables Steel Round-Wire Armoured Cables
Nom. Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Cross- Wire Weight Weight
Insulation Tape Sheath Overall Bedding Wire Sheath Overall
Section Screen
Thickness Thickness Thickness Diameter CU AL Thickness Size Thickness Diameter CU AL
Area Area*
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
50 9.3 0.1 16 3.2 73.9 5320 4446 1.9 3.15 3.8 87.1 10970 10090
70 9.3 0.1 16 3.3 78.0 6166 4880 2.0 3.5 3.9 91.3 12220 10750
95 9.3 0.1 16 3.5 81.9 7144 5430 2.1 3.5 4.0 94.5 13560 11780
120 9.3 0.1 16 3.6 85.1 8232 6049 2.1 4.0 4.1 97.5 14880 13650
150 9.3 0.1 25 3.7 88.6 9273 6549 2.1 4.0 4.2 100.5 16150 14060
185 9.3 0.1 25 3.8 93.5 10845 7392 2.2 4.0 4.3 105.5 17840 14390
240 9.3 0.1 25 4.0 98.2 12675 8310 2.3 4.5 4.5 111.5 20410 15870
300 9.3 0.1 25 4.1 103.6 14960 9362 2.4 4.5 4.6 116.5 24100 18460
400 9.3 0.1 35 4.3 110.0 18055 10698 2.5 4.5 4.8 124.3 28680 20560
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Steel Flat Wire Armoured Cables Double Steel Tape Armoured Cables
Nom. Approx. No of Steel Approx.
Nom. Armour Nom. Approx. Nom. Nom. Approx.
Cross- Weight tapes x Weight
Bedding Wire Sheath Oveall Bedding Sheath Overall
Section nom tape
Thickness Size Thickness Diameter CU AL Thickness Thickness Diameter CU AL
Area thickness
mm² mm mm mm mm kg/km mm mm mm mm kg/km
50 1.9 0.8 3.3 80.5 9825 8986 1.9 2x0.5 3.5 82.5 9625 8786
70 2.0 0.8 3.6 85.5 11015 9769 2.0 2x0.8 3.8 87.6 10825 9569
95 2.1 0.8 3.8 88.5 12360 10580 2.1 2x0.8 3.9 90.5 12116 10327
120 2.1 0.8 3.9 91.5 13900 11715 2.1 2x0.8 4.0 94.5 13306 11110
150 2.1 0.8 4.0 94.8 15160 12440 2.1 2x0.8 4.1 97.5 14550 11830
185 2.2 0.8 4.1 99.5 17500 13450 2.2 2x0.8 4.2 101.7 16810 12765
240 2.3 0.8 4.2 104.1 19390 14890 2.3 2x0.8 4.4 107.5 18650 14150
300 2.4 0.8 4.4 109.5 21970 16280 2.4 2x0.8 4.6 112.8 21200 15500
400 2.5 0.8 4.6 116.3 25600 18430 2.5 2x0.8 4.8 118.8 24780 17600

Electrical Data
Short Circuit Short Circuit Short Circuit
Nom.
DC AC Rating of Rating of Rating of
Cross- Charging
Resistance Resistance Conductor Capacitance Copper Wire Copper Tape Reactance Inductance
Section Current
CU / AL CU / AL CU / AL Screen Per Screen Per
Area
1 sec Core 1 sec Core 1 sec

mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m

50 387/641 494/822 6.8/4.4 135 0.91 2.6 1.1 140 450
70 268/443 343/568 9.8/6.3 151 1.01 2.6 1.1 134 415
95 193/320 248/410 13.3/8.5 166 1.11 2.6 1.2 126 405
120 153/253 196/325 17.2/11.0 179 1.21 2.6 1.2 123 385
150 124/206 159/265 21.2/13.5 189 1.29 4.3 1.3 118 375
185 99.1/164 128/211 26.6/17.0 202 1.38 4.3 1.3 114 365
240 75.4/125 98/161 34.9/22.3 221 1.49 4.3 1.4 109 345
300 60.1/100 80/130 43.8/28.0 240 1.65 4.3 1.5 105 335
400 47.0/77.8 64/102 57.3/36.6 267 1.75 5.8 1.6 101 305

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 Caledonian Medium Voltage Cables

Three Core 26/35KV (Um=42KV)

Dimensional Data
Unarmoured Cables Steel Round-Wire Armoured Cables
Nom. Copper Approx. Approx.
Nom. Copper Nom. Approx. Nom. Armour Nom. Approx.
Cross- Wire Weight Weight
Insulation Tape Sheath Overall Bedding Wire Sheath Overall
Section Screen
Thickness Thickness Thickness Diameter CU AL Thickness Size Thickness Diameter CU AL
Area Area*
mm² mm mm mm² mm mm kg/km mm mm mm mm kg/km
50 10.5 0.1 16 3.4 79.7 5928 5053 1.9 3.5 4.0 93.5 12050 11150
70 10.5 0.1 16 3.5 83.6 6900 5634 2.0 4.0 4.1 97.5 13150 11850
95 10.5 0.1 16 3.6 87.2 7863 6131 2.1 4.0 4.2 101.5 14800 12950
120 10.5 0.1 16 3.8 90.7 8817 6634 2.2 4.0 4.4 105.5 16050 13800
150 10.5 0.1 25 3.9 94.1 10085 7361 2.3 4.5 4.5 108.5 17420 14640
185 10.5 0.1 25 4.0 99.1 11573 8120 2.3 4.5 4.6 112 19200 15700
240 10.5 0.1 25 4.1 103.6 13387 9023 2.4 4.5 4.7 117 21050 16800
300 10.5 0.1 25 4.3 109.2 15658 10060 2.5 4.5 4.8 122.5 24900 19100
400 10.5 0.1 35 4.5 115.6 19013 11657 2.6 4.5 5.1 129 29200 21560
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Steel Flat Wire Armoured Cables Double Steel Tape Armoured Cables
Nom. Approx. Approx.
Nom. Armour Nom. Approx. Nom. No of Steel Nom. Approx.
Cross- Weight Weight
Bedding Wire Sheath Oveall Bedding tapes x nom Sheath Overall
Section
Thickness Size Thickness Diameter CU AL Thickness tape thickness Thickness Diameter CU AL
Area
mm² mm mm mm mm kg/km mm mm mm mm kg/km
50 1.9 0.8 3.5 86.5 10880 9990 1.9 2x0.8 3.7 87.5 10690 9800
70 2.0 0.8 3.6 90.5 12000 10795 2.0 2x0.8 3.8 91.4 10800 10590
95 2.1 0.8 3.8 94.0 13360 11570 2.1 2x0.8 3.9 95.2 13110 11327
120 2.2 0.8 3.9 96.4 13705 12710 2.2 2x0.8 4.0 98.7 14300 12110
150 2.3 0.8 4.0 99.5 16160 13440 2.3 2x0.8 4.1 102.1 15550 12800
185 2.3 0.8 4.1 105.1 18505 14465 2.3 2x0.8 4.2 107.3 17810 13765
240 2.4 0.8 4.2 109.8 20390 15890 2.4 2x0.8 4.4 112.2 19650 15150
300 2.5 0.8 4.4 115.5 22970 17280 2.5 2x0.8 4.6 118.0 22200 16500
400 2.6 0.8 4.6 122.1 26600 19430 2.6 2x0.8 4.8 124.6 25780 18600

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Charging Copper Wire Copper Tape
Resistance Resistance Conductor Capacitance Reactance Inductance
Section Current Screen Per Screen Per
CU / AL CU / AL CU / AL
Area Core Core
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m
50 387/641 494/822 6.8/4.4 131 0.97 2.6 1.2 146 470
70 268/443 343/568 9.8/6.3 145 1.07 2.6 1.2 139 430
95 193/320 248/410 13.3/8.5 158 1.18 2.6 1.3 132 420
120 153/253 196/325 17.2/11.0 169 1.26 2.6 1.3 128 400
150 124/206 159/265 21.2/13.5 178 1.36 4.3 1.4 123 390
185 99.1/164 128/211 26.6/17.0 185 1.44 4.3 1.4 118 380
240 75.4/125 98/161 34.9/22.3 203 1.57 4.3 1.5 113 360
300 60.1/100 80/130 43.8/28.0 219 1.72 4.3 1.6 109 350
400 47.0/77.8 64/102 57.3/36.6 245 1.85 5.8 1.7 105 320
 Medium Voltage Cables to IEC 60502

Current Rating for Three Core 1.8/3KV(Um=7.2 )KV to 26/35KV(Um=42KV) XLPE Insulation
Unarmored Armored
Nom. Buried direct in Laid in Single Way Buried direct in Laid in Single Way
Cross- Laid in Air Laid in Air
Ground Duct Ground Duct
Section
Area CU AL CU AL CU AL CU AL CU AL CU AL
mm² A A A A A A
10 76 53 62 42 87 62 76 53 63 43 88 63
16 101 78 87 67 109 84 101 78 88 68 110 85
25 129 100 112 87 142 110 129 100 112 87 143 111
35 153 119 133 103 170 132 154 119 134 104 172 133
50 181 140 158 122 204 158 181 140 158 123 205 159
70 221 171 193 150 253 196 220 171 194 150 253 196
95 262 203 231 179 304 236 263 204 232 180 307 238
120 298 232 264 205 351 273 298 232 264 206 352 274
150 334 260 297 231 398 309 332 259 296 231 397 309
185 377 294 336 262 455 355 374 293 335 262 453 354
240 434 340 390 305 531 415 431 338 387 304 529 415
300 489 384 441 346 606 475 482 380 435 343 599 472
400 553 438 501 398 696 552 541 432 492 393 683 545
500 613 498 541 451 786 652 601 492 532 446 773 645
630 663 568 591 501 896 762 651 562 582 496 883 755

Current Rating for Three Core 1.8/3KV(Um=7.2 )KV to 26/35KV(Um=42KV) EPR Insulation
Unarmored Armored
Nom. Buried direct in Laid in Single Way Buried direct in Laid in Single Way
Cross- Laid in Air Laid in Air
Ground Duct Ground Duct
Section
Area CU AL CU AL CU AL CU AL CU AL CU AL
mm² A A A A A A
10 73 51 59 40 82 58 73 51 60 41 82 59
16 98 76 84 65 104 80 98 76 85 66 104 81
25 125 97 109 84 135 105 125 97 109 85 136 105
35 150 116 130 101 164 127 150 116 131 101 164 127
50 176 137 154 119 195 151 177 137 155 120 197 153
70 216 167 189 147 243 189 216 168 190 147 244 190
95 258 200 227 176 296 229 257 200 227 176 296 230
120 292 227 258 201 339 263 292 227 259 201 339 264
150 328 255 291 226 385 299 327 254 291 226 385 300
185 371 289 330 257 441 343 368 288 328 257 439 343
240 429 335 384 300 519 406 424 332 381 299 513 402
300 482 378 434 340 590 462 475 374 429 338 583 459
400 545 432 494 392 678 538 534 426 485 387 666 530
500 605 492 534 445 768 638 594 486 525 440 756 630
630 655 562 584 495 878 749 644 556 575 490 862 741

▓▓ Current Rating Conditions:

Ground Temperature: 20°C
Ambient Temperature (air): 30°C
Depth of Soil: 0.8 m
Thermal Resistance of Soil: 1.5K•m/W

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Caledonian
Medium Voltage
Cables

I
IV II III
Medium Voltage Cables to VDE 0276
IV V

Single Core Cables To VDE 0276

Three Core Cables To VDE 0276

 Medium Voltage Cables to VDE 0276

Single Core Cables to VDE 0276

▓▓ APPLICATIONS:
The single core cables are designed for distribution
of electrical power with nominal voltage Uo/U
ranging from 3.8/6.6KV to 19/33KV and frequency
50Hz. They are suitable for installation mostly
in power supply stations, indoors and in cable
ducts, outdoors, underground and in water as well
as for installation on cable trays for industries,
switchboards and power stations.

▓▓ STANDARD: PVC/PE/LSZH Oversheath

Aluminium Wire Armour(optional)
Binder
XLPE Insulation
DIN VDE 0276 Part 620 -622 Conductor
HD 620 S1 Conductor Screen
Insulation Screen
Metallic Screen
PVC/PE/LSZH Separation Sheath(optional)

▓▓ CONSTRUCTION:

Conductor: Stranded compacted circular copper or aluminium conductors according to IEC

60228 class 2 / VDE 0276 class 2 / VDE 0295 HD 383. All internal interstices of the conductor
are filled with water blocking compound to prevent ingress of water through conductor during
storage, handing, installation and operation of the cable.
Conductor Screen: The conductor screen consists of an extruded layer of non metallic,
semi-conducting compound firmly bonded to the insulation to exclude all air voids. The screen
has a minimum thickness of 0.3mm and the maximum volume resistivity of 500 Ohm-m at
90°C.
Insulation: Insulation is of extruded XLPE compound type 2XI1 according to DIN VDE 0207
part 22 and HD 620.1 with high degree of cross-linking, free from contaminants, air voids and
heat resistant by dry cured process.
The nominal insulation wall thickness is shown in table 1.

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 Caledonian Medium Voltage Cables
Table 1. Insulation Thickness
Nom. Cross Insulation Thickness at Nom. Voltage
Section Area 3.6/6KV(Um=7.2kV) 6/10kV(Um=12kV) 8.7/15kV(Um=17.5kV) 12/20kV(Um=24kV) 18/30kv(Um=36kV)
mm² mm mm mm mm mm
35 2.5 3.4 4.5 5.5 -
50 2.5 3.4 4.5 5.5 8.0
70 2.5 3.4 4.5 5.5 8.0
95 2.5 3.4 4.5 5.5 8.0
120 2.5 3.4 4.5 5.5 8.0
150 2.5 3.4 4.5 5.5 8.0
185 2.5 3.4 4.5 5.5 8.0
240 2.6 3.4 4.5 5.5 8.0
300 2.8 3.4 4.5 5.5 8.0
400 3.0 3.4 4.5 5.5 8.0

Insulation Screen: The insulation screen consists of extruded non metallic, semi-conducting
compound extruded over the insulation. The extruded semi-conducting layer shall consist
of bonded or cold strippable semi-conducting compound capable of removal for jointing or
terminating.The minimum thickness is 0.3mm and the maximum volume resistivity of 500
Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can
be easily hand stripped on site.
Conducting Water Blocking Layer: The insulation screen may be coverd by semi-
conductive water blocking tape which will swell up under the influence of moisture of water to
ensure longitudinal watertightness.
Metallic Screen: Copper wires are applied over the conducting water blocking layer with a
minimum diameter of 0.5mm. And over the copper wires, copper tape with minimum thickness
of 0.1mm is applied helically with overlap. Total cross section of metallic screen layer is
shown in table 2. The screen can withstand fault current to earth of 1000 A for one second at
maximum temperature of 160°C. Minimum cross section of concentric conductor is according
to DIN VDE 0273 & 0276 as shown.

Table 2. Minimum Total Cross Section of Metallic Screen

Nominal Cross-Section Area Minimum Cross-Section
DC Resistance of the Copper Wire Screen
Of Cable of Metallic Screen

mm² mm² mm
Up to 120 16 1.06
150-300 25 0.72
400-630 35 0.51
800-1000 50 0.35

Separator / Water Blocking Layer: The metallic screen may be covered by non-conducting
water blocking tape which will swell up under the influence of moisture of water to ensure
longitudinal watertightness.
Separation Sheath (for armoured cable): The separation sheath comprises a layer of
extruded PVC, PE or LSZH, applied under the armour. Thickness of separation sheath as
shown in table 3.
 Medium Voltage Cables to VDE 0276
Table 3. Separation Sheath Thickness
Core Diameter Approx.Thickess of Inner Sheath
mm mm
> <
35 45 1.4
45 60 1.6
60 80 1.8
80 - 2.0

Armour (for armoured cable): The armour consists of round aluminium wire armour applied
helically over an extruded separation sheath.

Table 4. Round Armour Wire Diameter

Fictitious Diameter Under the Armour Armour Wire Diameter
mm mm
> <
- 10 0.8
10 15 1.25
15 25 1.6
25 35 2.0
35 60 2.5
60 - 3.15

Outer Sheath: Overall sheath comprises a layer of extruded PE compound DMP2 according
to HD620.1 and 2YM3 type to DIN VDE 0276 Part 3, or PVC compound DMV6 according
to HD620.1 and YM5 to DIN VDE 0276 Part 6. Normal wall thickness is 2.5mm (1/500mm
18/30sq 2.6mm), suitable for exposure to sun-light or other local atmospheric environments
and for the operating temperature of the cable.

▓▓ PHYSICAL PROPERTIES:

Operating Temperature: up to 90°C

Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds)
Bending Radius: 15 x OD (Cable without metal sheath)
30 x OD (Cable with aluminium sheath)

Table 5. Nominal /Operating /Testing Voltages

Nominal Voltage Uo/U Operating Voltage (max) Testing Voltage
3.6/6KV 8KV 10KV
6/10KV 12KV 15KV
8.7/15KV 18KV 22.5KV
12/20KV 24KV 30KV
18/30KV 36KV 45KV

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 Caledonian Medium Voltage Cables

▓▓ TYPE CODES:

Cores
N According to VDE Standard (No abbreviation for copper conductor)
A Aluminium Conductor
2X XLPE Insulation
Y PVC Insulation

Screen
S Screen of copper wires and copper tape, helically wound.
SE Screen of copper wire plus copper tape over each individual cores, helically wound
(F) Longitudinally waterproof screen.

Concentric Conductor Screen

C Concentric conductor screen of copper wires and copper tape, helically wound.
CE Concentric conductor screen of copper wire plus copper tape over each individual
cores, helically wound.

Jacket
2Y PE Jacket
Y PVC Jacket
H LSZH Jacket
 Medium Voltage Cables to VDE 0276

Single Core 1.8/3KV (Um=3.6KV)

Dimensional Data
Nom. Copper Approx. Weight
Nom. Copper Nom. Nom.
Cross- Wire
Insulation Tape Sheath Overall N2XSY/ NA2XSY/
N2XS2Y NA2XS2Y N2XS (F) 2Y NA2XS (F)
Section Screen
Thickness Thickness Thickness Diameter N2XSH NA2XSH
Cu Al Cu 2Y Al
Area Area* Cu Al
mm² mm mm mm² mm mm kg / km kg / km kg / km kg / km kg / km kg / km
25 2.0 0.1 16 1.4 13 500 180 480 140 500 230
35 2.0 0.1 16 1.4 14 620 280 600 240 620 330
50 2.0 0.1 16 1.4 15 700 380 750 290 750 430
70 2.0 0.1 16 1.5 17 900 480 800 380 1000 560
95 2.0 0.1 16 1.5 19 1200 590 1050 460 1300 670
120 2.0 0.1 16 1.6 21 1450 700 1300 550 1500 800
150 2.0 0.1 25 1.6 22 1700 800 1550 650 1800 900
185 2.0 0.1 25 1.7 24 2050 850 1900 750 2150 950
240 2.0 0.1 25 1.8 27 2550 1050 2350 900 2650 1150
300 2.0 0.1 25 1.8 29 3150 1250 2950 1050 3250 1350
400 2.0 0.1 35 1.9 32 3950 1550 3800 1450 4100 1650
500 2.2 0.1 35 2.0 35 5000 2000 4800 1800 5200 2150
630 2.4 0.1 35 2.2 38 6200 2200 6300 2100 6400 2350
800 2.6 0.1 35 2.3 44 8000 2900 7900 2800 8200 3050
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short
Short Impedance
Circuit Circuit
Nom. Circuit
DC AC Rating of Rating of Reactance Inductance
Cross- Rating of Capaci- Charging Flat
Resistance Resistance Copper Copper Trefoil
Section Conductor tance Current Spaced
CU / AL CU / AL Wire Tape
Area CU / AL
Screen Screen
1 sec Trefoil Flat Trefoil Flat cu AL cu AL
1 sec 1 sec Spaced Spaced
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/ m
25 727/1200 929/1538 3.6/2.3 222 0.32 2.6 0.3 131 185 345 535 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 251 0.35 2.6 0.4 122 178 327 524 679 1121 695 1131
50 387/641 494/822 6.8/4.4 281 0.39 2.6 0.4 116 172 313 514 511 834 527 844
70 268/443 343/568 9.8/6.3 341 0.45 2.6 0.5 110 165 300 495 364 583 386 597
95 193/320 248/410 13.3/8.5 397 0.50 2.6 0.5 104 160 287 485 272 427 300 446
120 153/253 196/325 17.2/11.0 430 0.55 2.6 0.6 104 159 280 475 225 345 257 367
150 124/206 159/265 21.2/13.5 464 0.59 4.3 0.6 100 156 274 465 193 287 229 313
185 99.1/164 128/211 26.6/17.0 513 0.65 4.3 0.7 98 154 267 459 165 237 206 267
240 75.4/125 98/161 34.9/22.3 573 0.70 4.3 0.9 94 150 260 455 140 191 185 226
300 60.1/100 80/130 43.8/28.0 652 0.72 4.3 1.0 91 147 253 445 128 163 174 203
400 47.0/77.8 64/102 57.3/36.6 727 0.75 5.8 1.1 90 147 248 435 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 754 0.79 5.8 1.2 89 145 245 425 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 786 0.87 5.8 1.3 86 143 243 415 97 110 151 160

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 Caledonian Medium Voltage Cables

SIngle Core 3.6/6KV (Um=7.2 KV)

Dimensional Data
Nom. Copper Approx. Weight
Nom. Copper Nom. Nom.
Cross- Wire N2XSY/ NA2XSY/
Insulation Tape Sheath Overall N2XS2Y NA2XS2Y N2XS (F) 2Y NA2XS (F) 2Y
Section Screen N2XSH NA2XSH
Thickness Thickness Thickness Diameter Cu Al Cu Al
Area Area* Cu Al
mm² mm mm mm² mm mm kg / km kg / km kg / km kg / km kg / km kg / km
25 2.5 0.1 16 1.5 18 700 480 600 550 700 560
35 2.5 0.1 16 1.6 20 820 580 800 560 900 660
50 2.5 0.1 16 1.6 21 1000 680 900 570 1050 750
70 2.5 0.1 16 1.7 23 1200 770 1100 650 1300 850
95 2.5 0.1 16 1.7 24 1500 890 1350 760 1550 990
120 2.5 0.1 16 1.8 26 1850 1000 1700 850 1900 1150
150 2.5 0.1 25 1.8 27 2100 1100 1950 1050 2200 1250
185 2.5 0.1 25 1.9 29 2450 1250 2300 1200 2550 1300
240 2.6 0.1 25 1.9 32 3050 1550 2850 1400 3150 1650
300 2.8 0.1 25 2.0 35 3650 1850 3450 1650 3750 1950
400 3.0 0.1 35 2.1 38 4550 2250 4400 2050 4700 2350
500 3.2 0.1 35 2.3 42 5700 2700 5500 2500 5900 2850
630 3.2 0.1 35 2.4 48 7090 3020 6890 2820 7290 3200
800 3.2 0.1 35 2.5 52 8900 3700 8700 3500 9100 3850
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short
Short Circuit Circuit Reactance Inductance Impedance
Nom. Circuit Rating Rating
DC AC
Cross- Rating of Capaci- Charging of of Flat
Resistance Resistance Trefoil
Section Conductor tance Current Copper Copper Flat Flat Spaced
CU / AL CU / AL
Area CU / AL Wire Tape Trefoil Spaced Trefoil Spaced
1 sec Screen Screen CU AL CU AL
1 sec 1 sec
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/m
16 1150/1910 1460/2420 2.2/1.4 232 0.29 2.6 0.4 152 205 410 600 1462 2411 1478 2420
25 727/1200 927/1538 3.6/2.3 262 0.32 2.6 0.4 142 196 400 590 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 291 0.35 2.6 0.5 133 187 390 580 679 1121 695 1131
50 387/641 494/822 6.8/4.4 321 0.39 2.6 0.5 121 179 380 570 511 834 527 844
70 268/443 343/568 9.8/6.3 371 0.45 2.6 0.6 115 173 370 550 364 583 386 597
95 193/320 248/410 13.3/8.5 417 0.50 2.6 0.6 110 168 350 540 272 427 300 446
120 153/253 196/325 17.2/11.0 459 0.55 2.6 0.7 107 165 340 520 225 345 257 367
150 124/206 159/265 21.2/13.5 494 0.59 4.3 0.7 103 161 330 510 193 287 229 313
185 99.1/164 128/211 26.6/17.0 543 0.65 4.3 0.8 100 158 320 500 165 237 206 267
240 75.4/125 98/161 34.9/22.3 583 0.70 4.3 0.9 97 155 310 490 140 191 185 226
300 60.1/100 80/130 43.8/28.0 602 0.72 4.3 1.0 95 153 300 490 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 627 0.75 5.8 1.1 92 150 290 480 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 654 0.79 5.8 1.2 90 147 290 470 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 726 0.87 5.8 1.3 87 145 280 460 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 786 0.91 5.8 1.4 85 143 270 460 92 101 147 153
* For capacitance & charging current values, multiply values shown by 1.2 for EPR insulated cables.
 Medium Voltage Cables to VDE 0276

Single Core 6/10KV (Um=12 KV)

Dimensional Data
Nom. Copper Approx. Weight
Nom. Copper Nom. Nom.
Cross- Wire
Insulation Tape Sheath Overall N2XSY/ NA2XSY/ N2XS2Y NA2XS2Y N2X (F) 2Y NA2XS (F) 2Y
Section Screen
Thickness Thickness Thickness Diameter N2XSH NA2XSH Cu Al Cu Al
Area Area* Cu Al
mm² mm mm mm mm mm kg / km kg / km kg / km kg / km kg / km kg / km
25 3.4 0.1 16 1.6 25 820 580 720 550 900 650
35 3.4 0.1 16 1.6 25 920 680 900 570 980 750
50 3.4 0.1 16 1.7 26 1100 780 950 670 1150 850
70 3.4 0.1 16 1.7 28 1300 870 1200 750 1400 950
95 3.4 0.1 16 1.8 30 1600 990 1450 860 1650 1100
120 3.4 0.1 16 1.8 32 1950 1100 1800 950 2050 1250
150 3.4 0.1 25 1.9 33 2200 1200 2050 1150 2300 1350
185 3.4 0.1 25 1.9 34 2550 1350 2400 1300 2650 1500
240 3.4 0.1 25 2.0 36 3150 1650 2950 1500 3250 1750
300 3.4 0.1 25 2.1 38 3750 1950 3550 1750 3850 2050
400 3.4 0.1 35 2.2 43 4650 2350 4500 2150 4800 2450
500 3.4 0.1 35 2.3 45 5800 2800 5700 2600 6000 2950
630 3.4 0.1 35 2.4 50 7300 3100 7010 2950 7500 3300
800 3.4 0.1 35 2.5 50 9100 3900 8900 3700 9300 4000
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short
Short Circuit Circuit Reactance Inductance Impedance
Nom. Circuit Rating Rating
DC AC
Cross- Rating of Capaci- Charging of of Flat
Resistance Resistance Trefoil
Section Conductor tance Current Copper Copper Flat Flat Spaced
CU / AL CU / AL
Area CU / AL Wire Tape Trefoil Spaced Trefoil Spaced
1 sec Screen Screen CU AL CU AL
1 sec 1 sec
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/m
25 727/1200 927/1538 3.6/2.3 208 0.42 2.6 0.5 144 210 460 660 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 229 0.46 2.6 0.6 136 200 440 640 679 1121 695 1131
50 387/641 494/822 6.8/4.4 252 0.50 2.6 0.6 131 195 420 620 511 834 527 844
70 268/443 343/568 9.8/6.3 288 0.58 2.6 0.7 122 188 390 600 364 583 386 597
95 193/320 248/410 13.3/8.5 323 0.65 2.6 0.7 122 182 390 580 272 427 300 446
120 153/253 196/325 17.2/11.0 353 0.71 2.6 0.8 116 172 370 550 225 345 257 367
150 124/206 159/265 21.2/13.5 380 0.76 4.3 0.8 110 166 350 530 193 287 229 313
185 99.1/164 128/211 26.6/17.0 416 0.83 4.3 0.9 107 166 340 530 165 237 206 267
240 75.4/125 98/161 34.9/22.3 460 0.92 4.3 0.9 104 163 330 520 140 191 185 226
300 60.1/100 80/130 43.8/28.0 506 1.01 4.3 1.0 100 157 320 500 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 561 1.12 5.8 1.1 94 154 300 490 113 141 164 184
500 36.6/60.5 51/81.0 72.3/46.2 619 1.24 5.8 1.2 91 151 290 480 105 124 158 171
630 28.3/46.9 42/64.0 91.2/58.3 698 1.37 5.8 1.3 91 148 290 470 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 780 1.39 5.8 1.4 88 144 280 470 92 101 147 153

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 Caledonian Medium Voltage Cables

Singke Core 8.7/15KV (Um=17.5KV)

Dimensional Data
Nom. Copper Approx. Weight
Nom. Copper Nom. Nom.
Cross- Wire
Insulation Tape Sheath Overall N2XSY/ NA2XSY/ N2XS2Y NA2XS2Y N2XS (F) 2Y NA2XS (F) 2Y
Section Screen
Thickness Thickness Thickness Diameter N2XSH NA2XSH Cu Al Cu Al
Area Area* Cu Al
mm² mm mm mm mm mm kg / km kg / km kg / km kg / km kg / km kg / km
25 4.5 0.1 16 1.7 26 900 600 880 500 900 700
35 4.5 0.1 16 1.7 26 1020 700 1000 600 1060 800
50 4.5 0.1 16 1.7 27 1200 880 1050 770 1250 950
70 4.5 0.1 16 1.8 29 1400 970 1300 850 1500 1050
95 4.5 0.1 16 1.8 31 1700 1090 1550 960 1750 1200
120 4.5 0.1 16 1.9 32 2050 1200 1900 1150 2100 1300
150 4.5 0.1 25 1.9 33 2300 1400 2150 1250 2400 1500
185 4.5 0.1 25 2.0 35 2650 1650 2500 1400 2750 1750
240 4.5 0.1 25 2.1 37 3250 1750 3050 1600 3350 1850
300 4.5 0.1 25 2.1 39 3850 2050 3650 1850 3950 2150
400 4.5 0.1 35 2.3 43 4850 2550 4700 2250 5000 2550
500 4.5 0.1 35 2.3 45 5900 2900 5700 2600 6100 3050
630 4.5 0.1 35 2.5 51 7500 3200 7200 3100 8000 3400
800 4.5 0.1 35 2.6 51 9300 4200 9100 4000 9500 4300
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short
Short Circuit Circuit Reactance Inductance Impedance
Nom. Circuit Rating Rating
DC AC
Cross- Rating of Capaci- Charging of of Flat
Resistance Resistance Trefoil
Section Conductor tance Current Copper Copper Flat Trefoil Spaced
CU / AL CU / AL
Area CU / AL Wire Tape Trefoil Spaced Spaced Flat
1 sec Screen Screen CU AL CU AL
1 sec 1 sec
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/m
25 727/1200 927/1538 3.6/2.3 171 0.47 2.6 0.6 150 210 480 680 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 187 0.51 2.6 0.6 141 207 460 660 679 1121 695 1131
50 387/641 494/822 6.8/4.4 204 0.57 2.6 0.7 138 195 440 640 511 834 527 844
70 268/443 343/568 9.8/6.3 232 0.63 2.6 0.7 132 188 420 600 364 583 386 597
95 193/320 248/410 13.3/8.5 258 0.71 2.6 0.8 126 182 400 580 272 427 300 446
120 153/253 196/325 17.2/11.0 281 0.74 2.6 0.8 119 179 380 570 225 345 257 367
150 124/206 159/265 21.2/13.5 301 0.79 4.3 0.9 113 176 360 560 193 287 229 313
185 99.1/164 128/211 26.6/17.0 329 0.87 4.3 0.9 110 170 350 540 165 237 206 267
240 75.4/125 98/161 34.9/22.3 363 0.96 4.3 1.0 107 166 340 530 140 191 185 226
300 60.1/100 80/130 43.8/28.0 398 1.03 4.3 1.1 104 160 330 510 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 439 1.17 5.8 1.2 97 157 310 500 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 483 1.28 5.8 1.3 94 154 300 490 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 534 1.42 5.8 1.4 91 151 290 480 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 590 1.61 5.8 1.4 91 147 290 470 92 101 147 153
 Medium Voltage Cables to VDE 0276

Single Core 12/20KV (Um=24KV)

Dimensional Data
Nom. Copper Approx. Weight
Nom. Copper Nom. Nom.
Cross- Wire
Insulation Tape Sheath Overall N2XSY/ NA2XSY/ N2XS2Y NA2XS2Y N2XS (F) 2Y NA2XS (F) 2Y
Section Screen
Thickness Thickness Thickness Diameter N2XSH NA2XSH Cu Al Cu Al
Area Area* Cu Al
mm² mm mm mm mm mm kg / km kg / km kg / km kg / km kg / km kg / km
25 5.5 0.1 16 1.8 29 1000 750 900 630 1100 850
35 5.5 0.1 16 1.8 30 1100 850 1050 730 1200 950
50 5.5 0.1 16 1.8 31 1250 970 1150 830 1350 1050
70 5.5 0.1 16 1.9 33 1500 1100 1350 920 1600 1200
95 5.5 0.1 16 1.9 34 1800 1200 1650 1050 1900 1300
120 5.5 0.1 16 2.0 35 2150 1350 1900 1150 2250 1450
150 5.5 0.1 25 2.0 37 2400 1500 2250 1350 2500 1650
185 5.5 0.1 25 2.1 38 2800 1700 2600 1550 2900 1800
240 5.5 0.1 25 2.1 42 3400 1900 3200 1750 3500 2050
300 5.5 0.1 25 2.2 43 4000 2200 3800 2000 4150 2300
400 5.5 0.1 35 2.3 44 4950 2600 4750 2400 5100 2800
500 5.5 0.1 35 2.4 46 6050 3000 5800 2800 6200 3200
630 5.5 0.1 35 2.5 50 8150 3600 8050 3400 8300 3750
800 5.5 0.1 35 2.6 53 9600 4400 9450 4200 9800 4300
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short
Short Circuit Circuit Reactance Inductance Impedance
Nom. Circuit Rating Rating
DC AC
Cross- Rating of Capaci- Charging of of Flat
Resistance Resistance Trefoil
Section Conductor tance Current Copper Copper Flat Flat Spaced
CU / AL CU / AL
Area CU / AL Wire Tape Trefoil Spaced Trefoil Spaced
1 sec Screen Screen Cu AL Cu AL
1 sec 1 sec
mm² µΩ/m µΩm kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/m
25 727/1200 927/1538 3.6/2.3 142 0.62 2.6 0.6 162 214 490 680 936 1544 952 1554
35 524/868 668/1113 5.0/3.2 162 0.65 2.6 0.7 150 207 470 660 679 1121 695 1131
50 387/641 494/822 6.8/4.4 177 0.71 2.6 0.8 141 201 450 640 511 834 527 844
70 268/443 343/568 9.8/6.3 200 0.80 2.6 0.8 135 195 430 620 364 583 386 597
95 193/320 248/410 13.3/8.5 222 0.89 2.6 0.9 129 188 410 600 272 427 300 446
120 153/253 196/325 17.2/11.0 241 0.96 2.6 0.9 122 182 390 580 225 345 257 367
150 124/206 159/265 21.2/13.5 257 1.03 4.3 1.0 116 176 370 560 193 287 229 313
185 99.1/164 128/211 26.6/17.0 280 1.12 4.3 1.0 116 173 370 550 165 237 206 267
240 75.4/125 98/161 34.9/22.3 307 1.23 4.3 1.1 110 170 350 540 140 191 185 226
300 60.1/100 80/130 43.8/28.0 336 1.34 4.3 1.2 107 166 340 530 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 370 1.48 5.8 1.3 100 160 320 510 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 406 1.62 5.8 1.4 97 154 310 490 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 449 1.80 5.8 1.5 94 151 300 480 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 490 1.85 5.8 1.6 91 151 290 480 92 101 147 153

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 Caledonian Medium Voltage Cables

Single Core 18/30KV (Um=36KV)

Dimensional Data
Nom. Copper Approx. Weight
Nom. Copper Nom. Nom.
Cross- Wire N2XSY/ NA2XSY/
Insulation Tape Sheath Overall N2XS2Y NA2XS2Y N2XS (F) 2Y NA2XS (F) 2Y
Section Screen N2XSH NA2XSH
Thickness Thickness Thickness Diameter Cu Al Cu Al
Area Area* Cu Al
mm² mm mm mm mm mm kg / km kg / km kg / km kg / km kg / km kg / km
25 8.0 0.1 16 1.9 30 1300 1050 1100 900 1400 1150
35 8.0 0.1 16 1.9 30 1400 1150 1200 1000 1500 1250
50 8.0 0.1 16 2.0 35 1550 1250 1350 1100 1650 1350
70 8.0 0.1 16 2.0 37 1750 1350 1600 1200 1900 1450
95 8.0 0.1 16 2.1 39 2050 1500 1900 1300 2150 1600
120 8.0 0.1 16 2.1 41 2350 1600 2150 1450 2450 1750
150 8.0 0.1 25 2.2 42 2700 1850 2550 1650 2750 1950
185 8.0 0.1 25 2.2 44 3100 2000 2900 1800 3150 2150
240 8.0 0.1 25 2.3 46 3700 2250 3500 2050 3800 2400
300 8.0 0.1 25 2.4 49 4350 2550 4150 2300 4400 2700
400 8.0 0.1 35 2.5 52 5350 3000 5100 2750 5450 3200
500 8.0 0.1 35 2.6 54 6450 3450 6200 3150 6550 3650
630 8.0 0.1 35 2.7 59 8300 3780 8100 3600 8600 4100
800 8.0 0.1 35 2.8 59 9900 4500 9700 4320 10300 4800
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Short
Short
Circuit Circuit Reactance Inductance Impedance
Circuit
Nom. Rating Rating
DC AC Rating
Cross- Capaci- Charging of of
Resistance Resistance of Trefoil Flat spaced
Section tance Current Copper Copper
CU / AL CU / AL Conductor
Area Wire Tape Trefoil Flat Trefoil Flat
CU / AL
Screen Screen Cu AL Cu AL
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m µΩ/ m µΩ/ m
727/1200 927/1538 3.6/2.3
25 121 0.71 2.6 0.9 159 229 530 720 686 1247 759 1146

50 387/641 494/822 6.8/4.4 138 0.83 2.6 1.0 151 214 480 680 511 834 527 844
70 268/443 343/568 9.8/6.3 154 0.92 2.6 1.0 144 201 460 640 364 583 386 597
95 193/320 248/410 13.3/8.5 169 1.01 2.6 1.1 138 195 440 620 272 427 300 446
120 153/253 196/325 17.2/11.0 183 1.10 2.6 1.1 132 188 420 600 225 345 257 367
150 124/206 159/265 21.2/13.5 194 1.16 4.3 1.2 126 182 400 580 193 287 229 313
185 99.1/164 128/211 26.6/17.0 210 1.26 4.3 1.2 122 182 390 580 165 237 206 267
240 75.4/125 98/161 34.9/22.3 229 1.37 4.3 1.3 119 176 380 560 140 191 185 226
300 60.1/100 80/130 43.8/28.0 249 1.49 4.3 1.4 113 173 360 550 126 163 174 203
400 47.0/77.8 64/102 57.3/36.6 273 1.64 5.8 1.5 107 163 340 520 113 141 164 184
500 36.6/60.5 51/81 72.3/46.2 298 1.79 5.8 1.6 104 163 330 520 105 124 158 171
630 28.3/46.9 42/64 91.2/58.3 327 1.96 5.8 1.7 99 160 320 510 97 110 151 160
800 22.1/36.7 35/55 114.4/75.0 350 1.98 5.8 1.8 98 154 310 490 92 101 147 153
 Medium Voltage Cables to VDE 0276

Current Rating for Single Core 1.8/3KV(Um=3.6KV ) to 18/30KV(Um=36KV) XLPE Insulation

Nom. Buried direct in Ground Laid in Single Way Duct Laid in Air
Cross-
Trefoil Flat spaced Trefoil Flat touching Trefoil Flat Touching Flat spaced
Section
Area CU AL CU AL CU AL CU AL CU AL CU AL CU AL
mm² A A A A A A A
10 84 59 87 62 78 55 98 56 103 75 106 77 122 88
16 109 84 113 88 103 80 104 81 125 97 128 99 150 116
25 140 108 144 112 132 102 133 103 163 127 167 130 196 153
35 166 129 172 134 157 122 159 123 198 154 203 157 238 185
50 196 152 203 157 186 144 188 146 238 184 243 189 286 222
70 239 186 246 192 227 176 229 178 296 230 303 236 356 278
95 285 221 293 229 271 210 274 213 361 280 369 287 434 338
120 323 252 332 260 308 240 311 242 417 324 426 332 500 391
150 361 281 366 288 343 267 347 271 473 368 481 376 559 440
185 406 317 410 324 387 303 391 307 543 424 550 432 637 504
240 469 367 470 373 447 351 453 356 641 502 647 511 745 593
300 526 414 524 419 504 397 510 402 735 577 739 586 846 677
400 590 470 572 466 564 451 571 457 845 673 837 676 938 769
500 650 530 672 546 604 504 661 537 935 773 938 776 1118 919
630 700 600 882 646 654 554 771 617 1045 883 1048 886 1318 1089
800 750 660 1002 756 694 594 871 717 1145 983 1148 986 1528 1279
1000 800 720 1112 856 724 644 971 807 1235 1083 1238 1086 1738 1469

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 Caledonian Medium Voltage Cables

Three Core Cables to VDE 0276

▓▓ APPLICATIONS:
The three core cables are designed for distribution
of electrical power with nominal voltage Uo/U
ranging from 3.6/6.6KV to 19/33KV and frequency
50Hz. They are suitable for installation mostly
in power supply stations, indoors and in cable
ducts, outdoors, underground and in water as well
as for installation on cable trays for industries,
switchboards and power stations.

▓▓ STANDARD: PVC/PE/LSZH Oversheath

PVC/PE/LSZH Separation Sheath(optional)
Metallic Screen
Insulation Screen
DIN VDE 0276 Part 620 -622 XLPE Insulation
HD 620 S1 Conductor
Conductor Screen
Binder
Armour(optional)

▓▓ CONSTRUCTION:

Conductor: Stranded compacted circular copper or aluminium conductors according to IEC

60228 class 2 / VDE 0276 class 2. VDE 0295 HD 383. All internal interstices of the conductor
are filled with water blocking compound to prevent ingress of water through conductor during
storage, handing, installation and operating of the cable.
Conductor Screen: The conductor screen consists of an extruded layer of non metallic,
semi-conducting compound firmly bonded to the insulation to exclude all air voids. The screen
has a minimum thickness of 0.3mm and the maximum volume resistivity of 500 Ohm-m at
90°C.
Insulation: Insulation is of extruded XLPE compound type 2XI1 according to DIN VDE 0207
part 22 and HD 620.1 with high degree of cross-linking, free from contaminants, air voids and
heat resistant by dry cured process.
The nominal insulation wall thickness is shown in table 1.
 Medium Voltage Cables to VDE 0276
Table 1. Insulation Thickness
Insulation Thickness at Nom. Voltage
Nom. Cross-Section
Area 3.6/6kV 6/10KV 8.7/15KV 12/20KV 18/30KV
(Um=7.2)kV (Um=12KV) (Um=17KV) (Um=24KV) (Um=36KV)

mm² mm mm mm mm mm
XLPE XLPE XLPE XLPE XLPE
35 2.5 3.4 4.5 5.5 -
50 2.5 3.4 4.5 5.5 8.0
70 2.5 3.4 4.5 5.5 8.0
95 2.5 3.4 4.5 5.5 8.0
120 2.5 3.4 4.5 5.5 8.0
150 2.5 3.4 4.5 5.5 8.0
185 2.5 3.4 4.5 5.5 8.0
240 2.6 3.4 4.5 5.5 8.0
300 2.8 3.4 4.5 5.5 8.0
400 3.0 3.4 4.5 5.5 8.0

Insulation Screen: The insulation screen consists of extruded non metallic, semi-conducting
compound extruded over the insulation. The extruded semi-conducting layer shall consist
of bonded or cold strippable semi-conducting compound capable of removal for jointing or
terminating. The minimum thickness is 0.3mm and the maximum volume resistivity of 500
Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can
be easily hand stripped on site.
Conducting Water Blocking Layer: The insulation screen may be covered by semi-
conductive water blocking tape which will swell up under the influence of moisture of water to
ensure longitudinal watertightness.
Metallic Screen: Copper wires are applied over the conducting water blocking layer with
a minimum diameter of 0.5mm. And over the copper wires, copper tape with minimum
thickness of 0.1mm is applied helically with overlap. Total cross section of metallic screen
layer is shown in table 2. The screen can withstand of fault current to earth of 1000 A for one
second at maximum temperature of 160°C. Minimum cross section of concentric conductor is
according to DIN VDE 0273 & 0276 as shown.

Table 2. Minimum Total Cross Section of Metallic Screen

Minimum Cross-Section
Nominal Cross-Section Area Of Cable DC Resistance of the Copper Wire Screen
of Metallic Screen
mm² mm² mm
Up to 120 16 1.06
150-300 25 0.72
400-630 35 0.51
800-1000 50 0.35

Separator / Water Blocking Layer: The metallic screen may be covered by non-conducting
water blocking tape which will swell up under the influence of moisture of water to ensure
longitudinal watertightness.
Separation Sheath (for armoured cable): The separation sheath comprises a layer of
extruded PVC, PE or LSZH, applied under the armour. Thickness of separation sheath is
shown in table 3.

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 Caledonian Medium Voltage Cables
Table 3. Separation Sheath Thickness
Cores Diameter Approx.Thickess of Inner Sheath
mm mm
> <
35 45 1.4
45 60 1.6
60 80 1.8
80 - 2.0

Armour(for armoured cable):

The armour consists of:
1) Double layers of galvanized steel tape are applied helically with proper inner overlapping
over an extruded separation sheath. Thickness of the steel tape is shown in table 4.

Tabel 4. Galvanized Steel Tape Thickness

Inner Diameter Thickness of Galvanized Steel Tape
mm mm
> <
- 30 0.2
30 70 0.5
70 - 0.8

2) Galvanized flat steel wires with thickness of 0.8 mm are applied helically over the surface
of inner sheath with minimum of 90% coverage. And galvanized Steel tape with nominal
thickness of 0.3 mm is applied helically with 50% coverage to cover the surface of the flat
wires.

Outer Sheath: Overall sheath comprises a layer of extruded PE compound DMP2 according
to HD620.1 and 2YM3 type to DIN VDE 0276 Part 3, or PVC compound DMV6 according
to HD620.1 and YM5 to DIN VDE 0276 Part 6. Normal wall thickness is 2.5mm (1/500mm
18/30sq 2.6mm), suitable for exposure to sun-light or other local atmospheric environments
and for the operating temperature of the cable.

▓▓ PHYSICAL PROPERTIES:

Operating Temperature: up to 90°C

Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds)
Bending Radius: 15 x OD (Cable without metal sheath)
30 x OD (Cable with aluminium sheath)

Table 5. Nominal /Operating /Testing Voltages

Nominal Voltage Uo/U Operating Voltage (Um) Testing Voltage
3.6/6KV 8KV 12.5KV
6/10KV 12KV 21KV
8.7/15KV 18KV 30.5KV
12/20KV 24KV 42KV
18/30KV 36KV 63KV
 Medium Voltage Cables to VDE 0276

▓▓ TYPE CODES:

Conductor
N According to VDE Standard (No abbreviation for copper conductor)
A Aluminium conductor
- Copper conductor

Insulation
2X XLPE

Screen
C Concentric conductor of copper
CE Concentric conductor of copper over each individual core
S Screen of copper wires & copper tape, helically wound
SE Screen of copper wires over each individual cores
(G) Longitudinally waterproof

Armour
F Armour of galvanized flat steel wire
G Counter Helix of galvanized steel tape
B Steel tape armouring
R Armour of galvanized round steel wire

Sheath
2Y PE
Y PVC
H LSZH
K Lead sheath
KL Aluminium sheath

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 Caledonian Medium Voltage Cables

Three Core 3.6/6KV (Um=7.2KV)

N2XSEY
NA2XSEY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Diameter Cu Al
Area Area*

mm² mm mm mm mm² mm mm mm kg / km kg / km
25 6.05 2.5 0.1 16 12.5 1.5 37 2100 1600
35 7.10 2.5 0.1 16 13.5 1.6 39 2500 1800
50 8.25 2.5 0.1 16 14.7 1.6 42 3000 2100
70 9.90 2.5 0.1 16 16.3 1.7 46 3800 2500
95 11.7 2.5 0.1 16 18.1 1.7 50 4800 3000
120 13.1 2.5 0.1 16 19.5 1.8 53 5800 3500
150 14.3 2.5 0.1 25 20.7 1.8 56 6700 3900
185 16.3 2.5 0.1 25 22.7 1.9 60 8100 4600
240 18.7 2.6 0.1 25 25.3 1.9 66 10200 5600
300 20.9 2.8 0.1 25 27.9 2.0 72 12500 6700
400 23.7 3.0 0.1 35 31.1 2.1 80 15600 8200
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Three Core 3.6/6KV (Um=7.2KV) Galvanized Steel Tape Armoured Cables

N2XSEYBY
NA2XSEYBY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*

mm² mm mm mm mm² mm mm mm mm kg / km kg / km
25 6.05 2.5 0.1 16 12.5 0.5 2.2 39 2800 2300
35 7.10 2.5 0.1 16 13.5 0.5 2.3 42 3200 2600
50 8.25 2.5 0.1 16 14.7 0.5 2.4 45 3800 2900
70 9.90 2.5 0.1 16 16.3 0.5 2.5 49 4700 3400
95 11.7 2.5 0.1 16 18.1 0.5 2.6 53 5800 4000
120 13.1 2.5 0.1 16 19.5 0.5 2.7 56 6800 4600
150 14.3 2.5 0.1 25 20.7 0.5 2.8 59 7900 5100
185 16.3 2.5 0.1 25 22.7 0.8 2.9 64 9400 5900
240 18.7 2.6 0.1 25 25.3 0.8 3.1 70 11700 7000
300 20.9 2.8 0.1 25 27.9 0.8 3.3 76 14100 8300
400 23.7 3.0 0.1 35 31.1 0.8 3.6 85 18300 10900
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.
 Medium Voltage Cables to VDE 0276

Three Core 3.6/6KV (Um=7.2KV) Galvanized Flat Steel wire+Steel Tape Armoured Cables
N2XSEYFGbY
NA2XSEYFGbY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm mm kg / km kg / km
25 6.05 2.5 0.1 16 12.5 0.8 2.2 40 2900 2400
35 7.10 2.5 0.1 16 13.7 0.8 2.3 42 3300 2700
50 8.25 2.5 0.1 16 14.7 0.8 2.4 45 3900 3000
70 9.90 2.5 0.1 16 16.3 0.8 2.5 49 4900 3600
95 11.7 2.5 0.1 16 18.1 0.8 2.6 53 6000 4200
120 13.1 2.5 0.1 16 19.5 0.8 2.7 56 7000 4700
150 14.3 2.5 0.1 25 20.7 0.8 2.8 59 8100 5200
185 16.3 2.5 0.1 25 22.7 0.8 2.9 64 9600 6100
240 18.7 2.6 0.1 25 25.3 0.8 3.1 70 11900 7200
300 20.9 2.8 0.1 25 27.9 0.8 3.3 76 14300 8600
400 23.7 3.0 0.1 35 31.1 0.8 3.6 84 17700 10300
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Charging Copper Wire Copper Tape
Resistance Resistance Conductor Capacitance Reactance Inductance
Section Current Screen Screen
CU / AL CU / AL CU / AL
Area Per Core Per Core
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m
25 727/1200 927/1538 3.6/2.3 272 0.33 2.6 0.4 116 370
35 524/868 668/1113 5.0/3.2 301 0.36 2.6 0.5 108 350
50 387/641 494/822 6.8/4.4 332 0.40 2.6 0.5 102 330
70 268/443 343/568 9.8/6.3 383 0.46 2.6 0.6 97 310
95 193/320 248/410 13.3/8.5 432 0.52 2.6 0.6 92 290
120 153/253 196/325 17.2/11.0 474 0.57 2.6 0.7 89 280
150 124/206 159/265 21.2/13.5 511 0.61 4.3 0.7 87 280
185 99.1/164 128/211 26.6/17.0 562 0.67 4.3 0.8 86 270
240 75.4/125 98/161 34.9/22.3 602 0.72 4.3 0.9 83 260
300 60.1/100 80/130 43.8/28.0 622 0.75 4.3 1.0 82 260
400 47.0/77.8 64/102 57.3/36.6 648 0.78 5.8 1.1 80 250

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 Caledonian Medium Voltage Cables

Three Core 6/10KV (Um=12KV)

N2XSEY
NA2XSEY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm kg / km kg / km
25 6.05 3.4 0.1 16 14.3 1.6 41 2400 1900
35 7.10 3.4 0.1 16 15.3 1.6 43 2800 2200
50 8.25 3.4 0.1 16 16.5 1.7 46 3400 2500
70 9.90 3.4 0.1 16 18.1 1.7 50 4200 2900
95 11.7 3.4 0.1 16 19.9 1.8 54 5300 3400
120 13.1 3.4 0.1 16 21.3 1.8 57 6200 3900
150 14.3 3.4 0.1 25 22.5 1.9 60 7200 4400
185 16.3 3.4 0.1 25 24.5 1.9 64 8600 5100
240 18.7 3.4 0.1 25 26.9 2.0 70 10700 6100
300 20.9 3.4 0.1 25 29.1 2.1 75 12900 7100
400 23.7 3.4 0.1 35 31.9 2.2 81 15900 8500
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Three Core 6/10KV (Um=12KV) Galvanized Steel Tape Armoured Cables

N2XSEYBY
NA2XSEYBY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm mm kg / km kg / km
25 6.05 3.4 0.1 16 14.3 0.5 2.3 44 3200 2700
35 7.10 3.4 0.1 16 15.3 0.5 2.4 46 3700 3000
50 8.25 3.4 0.1 16 16.5 0.5 2.5 49 4300 3400
70 9.90 3.4 0.1 16 18.1 0.5 2.6 53 5200 3900
95 11.7 3.4 0.1 16 19.9 0.5 2.8 57 6400 4600
120 13.1 3.4 0.1 16 21.3 0.5 2.9 61 7400 5200
150 14.3 3.4 0.1 25 22.5 0.5 3.0 64 8500 5700
185 16.3 3.4 0.1 25 24.5 0.5 3.1 68 10000 6500
240 18.7 3.4 0.1 25 26.9 0.5 3.3 74 12300 7600
300 20.9 3.4 0.1 25 29.1 0.5 3.4 79 14600 8800
400 23.7 3.4 0.1 35 31.9 0.8 3.7 87 18700 11300
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.
 Medium Voltage Cables to VDE 0276

Three Core 6/10KV (Um=12KV) Galvanized Flat Steel wire Armoured Cables
N2XSEYFGbY
NA2XSEYFGbY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm mm kg / km kg / km
25 6.05 3.4 0.1 16 14.3 0.8 2.3 44 3300 2800
35 7.10 3.4 0.1 16 15.3 0.8 2.4 46 3800 3100
50 8.25 3.4 0.1 16 16.5 0.8 2.5 49 4400 3500
70 9.90 3.4 0.1 16 18.1 0.8 2.6 53 5400 4100
95 11.7 3.4 0.1 16 19.9 0.8 2.8 57 6500 4700
120 13.1 3.4 0.1 16 21.3 0.8 2.9 61 7600 5300
150 14.3 3.4 0.1 25 22.5 0.8 3.0 64 8700 5900
185 16.3 3.4 0.1 25 24.5 0.8 3.1 68 10200 6800
240 18.7 3.4 0.1 25 26.9 0.8 3.3 74 12500 7900
300 20.9 3.4 0.1 25 29.1 0.8 3.4 79 14900 9100
400 23.7 3.4 0.1 35 31.9 0.8 3.7 86 18000 10600
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Charging Copper Wire Copper Wire
Resistance Resistance Conductor Capacitance Reactance Inductance
Section Current Screen Screen
CU / AL CU / AL CU / AL
Area Per Core Per Core
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m
25 727/1200 927/1538 3.6/2.3 204 0.43 2.6 0.5 129 405
35 524/868 668/1113 5.0/3.2 237 0.47 2.6 0.6 115 370
50 387/641 494/822 6.8/4.4 260 0.52 2.6 0.6 109 350
70 268/443 343/568 9.8/6.3 298 0.60 2.6 0.7 103 330
95 193/320 248/410 13.3/8.5 334 0.67 2.6 0.7 99 320
120 153/253 196/325 17.2/11.0 365 0.73 2.6 0.8 96 310
150 124/206 159/265 21.2/13.5 392 0.78 4.3 0.8 93 300
185 99.1/164 128/211 26.6/17.0 430 0.86 4.3 0.9 90 290
240 75.4/125 98/161 34.9/22.3 476 0.95 4.3 0.9 87 280
300 60.1/100 80/130 43.8/28.0 524 1.05 4.3 1.0 85 270
400 47.0/77.8 64/102 57.3/36.6 580 1.16 5.8 1.1 81 260

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 Caledonian Medium Voltage Cables

Three Core 8.7/15KV (Um=17.5KV)

N2XSEY
NA2XSEY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm kg / km kg / km
25 6.05 4.5 0.1 16 16.5 1.7 46 3500 2400
35 7.10 4.5 0.1 16 17.5 1.7 48 3800 2600
50 8.25 4.5 0.1 16 18.7 1.7 51 4400 3000
70 9.90 4.5 0.1 16 20.3 1.8 55 5300 3400
95 11.7 4.5 0.1 16 22.1 1.8 59 6400 4000
120 13.1 4.5 0.1 16 23.5 1.9 62 7400 4500
150 14.3 4.5 0.1 25 24.7 1.9 65 8500 5000
185 16.3 4.5 0.1 25 26.7 2.0 69 10000 5800
240 18.7 4.5 0.1 25 29.1 2.1 75 12200 6800
300 20.9 4.5 0.1 25 31.3 2.1 80 14400 7900
400 23.7 4.5 0.1 35 34.1 2.2 87 17500 9300
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Three Core 8.7/15KV (Um=17.5KV) Galvanized Steel Tape Armoured Cables

N2XSEYBY
NA2XSEYBY
Dimensional Data
Nom. Copper Approx. Weight
Approx Nom. Copper Approx Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm mm kg / km kg / km
25 6.05 4.5 0.1 16 16.5 0.5 2.5 49 3800 3300
35 7.10 4.5 0.1 16 17.5 0.5 2.6 51 4300 3600
50 8.25 4.5 0.1 16 18.7 0.5 2.7 54 4900 4000
70 9.90 4.5 0.1 16 20.3 0.5 2.8 58 5900 4600
95 11.7 4.5 0.1 16 22.1 0.5 2.9 62 7100 5300
120 13.1 4.5 0.1 16 23.5 0.5 3.0 66 8100 5900
150 14.3 4.5 0.1 25 24.7 0.5 3.1 69 9200 6400
185 16.3 4.5 0.1 25 26.7 0.5 3.3 74 10900 7400
240 18.7 4.5 0.1 25 29.1 0.5 3.4 79 13100 8500
300 20.9 4.5 0.1 25 31.3 0.5 3.6 86 16400 10600
400 23.7 4.5 0.1 35 34.1 0.8 3.9 93 19700 12300
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.
 Medium Voltage Cables to VDE 0276

Three Core 8.7/15KV (Um=17.5KV) Galvanized Flat Steel Wire Armoured Cables
N2XSEYFGbY
NA2XSEYFGbY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm mm kg / km kg / km
25 6.05 4.5 0.1 16 16.5 0.8 2.5 49 3400 3400
35 7.10 4.5 0.1 16 17.5 0.8 2.6 51 4400 3800
50 8.25 4.5 0.1 16 18.7 0.8 2.7 54 5100 4200
70 9.90 4.5 0.1 16 20.3 0.8 2.8 58 6000 4700
95 11.7 4.5 0.1 16 22.1 0.8 2.9 62 7300 5400
120 13.1 4.5 0.1 16 23.5 0.8 3.0 66 8300 6100
150 14.3 4.5 0.1 25 24.7 0.8 3.1 69 9400 6600
185 16.3 4.5 0.1 25 26.7 0.8 3.3 74 11100 7600
240 18.7 4.5 0.1 25 29.1 0.8 3.4 79 13400 8700
300 20.9 4.5 0.1 25 31.3 0.8 3.6 85 15800 10000
400 23.7 4.5 0.1 35 34.1 0.8 3.9 91 19000 11600
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Charging Copper Wire Copper Tape
Resistance Resistance Conductor Capacitance Reactance Inductance
Section Current Screen Screen
CU / AL CU / AL CU / AL
Area Per Core Per Core
1 sec
1 sec 1 sec
mm² µΩm µΩ/m kA pF/m mA/m kA kA µΩm nH/m
25 727/1200 927/1538 3.6/2.3 176 0.48 2.6 0.6 132 410
35 524/868 668/1113 5.0/3.2 193 0.53 2.6 0.6 123 390
50 387/641 494/822 6.8/4.4 211 0.58 2.6 0.7 116 370
70 268/443 343/568 9.8/6.3 240 0.65 2.6 0.7 110 350
95 193/320 248/410 13.3/8.5 267 0.73 2.6 0.8 105 330
120 153/253 196/325 17.2/11.0 291 0.79 2.6 0.8 102 320
150 124/206 159/265 21.2/13.5 312 0.85 4.3 0.9 98 310
185 99.1/164 128/211 26.6/17.0 340 0.93 4.3 0.9 95 300
240 75.4/125 98/161 34.9/22.3 375 1.02 4.3 1.0 91 290
300 60.1/100 80/130 43.8/28.0 411 1.12 4.3 1.1 89 280
400 47.0/77.8 64/102 57.3/36.6 454 1.24 5.8 1.2 84 270

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 Caledonian Medium Voltage Cables

Three Core 12/20KV (Um=24KV)

N2XSEY
NA2XSEY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm kg / km kg / km
35 7.10 5.5 0.1 16 19.7 1.8 53 3800 3100
50 8.25 5.5 0.1 16 20.9 1.8 56 4400 3500
70 9.90 5.5 0.1 16 22.5 1.9 60 5300 4000
95 11.7 5.5 0.1 16 24.3 1.9 64 6400 4600
120 13.1 5.5 0.1 16 25.7 2.0 67 7400 5200
150 14.3 5.5 0.1 25 26.9 2.0 70 8500 5700
185 16.3 5.5 0.1 25 28.9 2.1 75 10000 6500
240 18.7 5.5 0.1 25 31.3 2.1 80 12200 7500
300 20.9 5.5 0.1 25 33.5 2.2 85 14400 8700
400 23.7 5.5 0.1 35 36.3 2.3 91 17500 10200
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Three Core 12/20KV (Um=24KV) Galvanized Steel Tape Armoured Cables

N2XSEYBY
NA2XSEYBY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm mm kg / km kg / km
35 7.10 5.5 0.1 16 19.7 0.5 2.7 57 4900 4200
50 8.25 5.5 0.1 16 20.9 0.5 2.9 60 5600 4700
70 9.90 5.5 0.1 16 22.5 0.5 3.0 64 6600 5300
95 11.7 5.5 0.1 16 24.3 0.5 3.1 68 7800 6000
120 13.1 5.5 0.1 16 25.7 0.5 3.2 71 8900 6600
150 14.3 5.5 0.1 25 26.9 0.5 3.3 74 10100 7200
185 16.3 5.5 0.1 25 28.9 0.5 3.4 79 11700 8200
240 18.7 5.5 0.1 25 31.3 0.8 3.6 86 14900 10200
300 20.9 5.5 0.1 25 33.5 0.8 3.8 91 17400 11600
400 23.7 5.5 0.1 35 36.3 0.8 4.0 98 20800 13400
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.
 Medium Voltage Cables to VDE 0276

Three Core 12/20KV (Um=24KV) Galvanized Flat Steel Wire Armoured Cables
N2XSEYFGbY
NA2XSEYFGbY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm mm kg / km kg / km
35 7.10 5.5 0.1 16 19.7 0.8 2.7 57 5000 4400
50 8.25 5.5 0.1 16 20.9 0.8 2.9 60 5700 4800
70 9.90 5.5 0.1 16 22.5 0.8 3.0 64 6800 5400
95 11.7 5.5 0.1 16 24.3 0.8 3.1 68 8000 6200
120 13.1 5.5 0.1 16 25.7 0.8 3.2 71 9100 6800
150 14.3 5.5 0.1 25 26.9 0.8 3.3 74 10300 7500
185 16.3 5.5 0.1 25 28.9 0.8 3.4 79 11900 8400
240 18.7 5.5 0.1 25 31.3 0.8 3.6 85 14300 9600
300 20.9 5.5 0.1 25 33.5 0.8 3.8 90 16700 10900
400 23.7 5.5 0.1 35 36.3 0.8 4.0 97 20100 12700
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Capaci- Charging Copper Wire Copper Tape
Resistance Resistance Conductor Reactance Inductance
Section tance Current Screen Screen
CU / AL CU / AL CU / AL
Area Per Core Per Core
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m
35 524/868 668/1113 5.0/3.2 168 0.67 2.6 0.7 129 410
50 387/641 494/822 6.8/4.4 183 0.73 2.6 0.8 122 390
70 268/443 343/568 9.8/6.3 207 0.83 2.6 0.8 115 370
95 193/320 248/410 13.3/8.5 229 0.92 2.6 0.9 110 350
120 153/253 196/325 17.2/11.0 249 1.00 2.6 0.9 106 340
150 124/206 159/265 21.2/13.5 266 1.06 4.3 1.0 103 330
185 99.1/164 128/211 26.6/17.0 289 1.16 4.3 1.0 100 320
240 75.4/125 98/161 34.9/22.3 318 1.27 4.3 1.1 95 300
300 60.1/100 80/130 43.8/28.0 348 1.39 4.3 1.2 93 300
400 47.0/77.8 64/102 57.3/36.6 388 1.53 5.8 1.3 87 280

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 Caledonian Medium Voltage Cables

Three Core 18/30KV (Um=36KV)

N2XSEY
NA2XSEY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm kg / km kg / km
50 8.25 8.0 0.1 16 25.9 2.0 68 5800 4900
70 9.90 8.0 0.1 16 27.5 2.0 71 6800 5500
95 11.7 8.0 0.1 16 29.3 2.1 75 8000 6100
120 13.1 8.0 0.1 16 30.7 2.1 79 9000 6700
150 14.3 8.0 0.1 25 31.9 2.2 81 10100 7300
185 16.3 8.0 0.1 25 33.9 2.2 86 11800 8300
240 18.7 8.0 0.1 25 36.3 2.3 91 14000 9400
300 20.9 8.0 0.1 25 38.5 2.4 97 16500 10700
400 23.7 8.0 0.1 35 41.3 2.5 103 19700 12300
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Three Core 18/30KV (Um=36KV) Galvanized Steel Tape Armoured Cables

N2XSEYBY
NA2XSEYBY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm mm kg / km kg / km
50 8.25 8.0 0.1 16 25.9 0.5 3.2 72 7300 6400
70 9.90 8.0 0.1 16 27.5 0.5 3.3 75 8400 7100
95 11.7 8.0 0.1 16 29.3 0.5 3.5 80 9700 7900
120 13.1 8.0 0.1 16 30.7 0.8 3.6 84 11700 9400
150 14.3 8.0 0.1 25 31.9 0.8 3.7 87 12900 10100
185 16.3 8.0 0.1 25 33.9 0.8 3.9 92 14800 11300
240 18.7 8.0 0.1 25 36.3 0.8 4.0 98 17300 12600
300 20.9 8.0 0.1 25 38.5 0.8 4.2 103 20000 14100
400 23.7 8.0 0.1 35 41.3 0.8 4.4 110 23500 16000
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.
 Medium Voltage Cables to VDE 0276

Three Core 18/30KV (Um=36KV) Galvanized Flat Steel wire Armoured Cables
N2XSEYFGbY
NA2XSEYFGbY
Dimensional Data
Nom. Copper Approx. Weight
Approx. Nom. Copper Approx. Nom. Nom. Approx.
Cross- Wire
Conductor Insulation Tape Insulation Armour Sheath Overall
Section Screen
Diameter Thickness Thickness Diameter Thickness Thickness Diameter Cu Al
Area Area*
mm² mm mm mm mm² mm mm mm mm kg / km kg / km
50 8.25 8.0 0.1 16 25.9 0.8 3.2 72 7500 6600
70 9.90 8.0 0.1 16 27.5 0.8 3.3 76 8600 7300
95 11.7 8.0 0.1 16 29.3 0.8 3.5 80 10000 8100
120 13.1 8.0 0.1 16 30.7 0.8 3.6 83 11200 8900
150 14.3 8.0 0.1 25 31.9 0.8 3.7 86 12400 9500
185 16.3 8.0 0.1 25 33.9 0.8 3.9 91 14100 10600
240 18.7 8.0 0.1 25 36.3 0.8 4.0 97 16600 11900
300 20.9 8.0 0.1 25 38.5 0.8 4.2 102 19200 13400
400 23.7 8.0 0.1 35 41.3 0.8 4.4 109 22700 15300
*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as
standard.

Electrical Data
Short Circuit Short Circuit
Short Circuit
Nom. Rating of Rating of
DC AC Rating of
Cross- Charging Copper Wire Copper Tape
Resistance Resistance Conductor Capacitance Reactance Inductance
Section Current Screen Screen
CU / AL CU / AL CU / AL
Area Per Core Per Core
1 sec
1 sec 1 sec
mm² µΩ/m µΩ/m kA pF/m mA/m kA kA µΩ/m nH/m
50 387/641 494/822 6.8/4.4 142 0.85 2.6 1.0 134 430
70 268/443 343/568 9.8/6.3 159 0.95 2.6 1.0 127 400
95 193/320 248/410 13.3/8.5 175 1.05 2.6 1.1 121 390
120 153/253 196/325 17.2/11.0 189 1.13 2.6 1.1 117 370
150 124/206 159/265 21.2/13.5 201 1.21 4.3 1.2 113 360
185 99.1/164 128/211 26.6/17.0 217 1.3 4.3 1.2 109 350
240 75.4/125 98/161 34.9/22.3 237 1.42 4.3 1.3 104 330
300 60.1/100 80/130 43.8/28.0 258 1.55 4.3 1.4 101 320
400 47.0/77.8 64/102 57.3/36.6 282 1.69 5.8 1.5 96 290

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 Caledonian Medium Voltage Cables

Current Rating for Three Core 1.8/3KV(Um=7.2KV ) to 26/35KV(Um=42KV) XLPE Insulation

Unarmored Armored
Nom. Buried direct in Laid in Single Way Buried direct in Laid in Single Way
Cross- Laid in Air Laid in Air
Ground Duct Ground Duct
Section
Area CU AL CU AL CU AL CU AL CU AL CU AL
mm² A A A A A A
10 76 53 62 42 87 62 76 53 63 43 88 63
16 101 78 87 67 109 84 101 78 88 68 110 85
25 129 100 112 87 142 110 129 100 112 87 143 111
35 153 119 133 103 170 132 154 119 134 104 172 133
50 181 140 158 122 204 158 181 140 158 123 205 159
70 221 171 193 150 253 196 220 171 194 150 253 196
95 262 203 231 179 304 236 263 204 232 180 307 238
120 298 232 264 205 351 273 298 232 264 206 352 274
150 334 260 297 231 398 309 332 259 296 231 397 309
185 377 294 336 262 455 355 374 293 335 262 453 354
240 434 340 390 305 531 415 431 338 387 304 529 415
300 489 384 441 346 606 475 482 380 435 343 599 472
400 553 438 501 398 696 552 541 432 492 393 683 545
500 613 498 541 451 786 652 601 492 532 446 773 645
630 663 568 591 501 896 762 651 562 582 496 883 755
Caledonian
Medium Voltage
Cables

I
VII
Technical Information
III IV V
 Caledonian Medium Voltage Cables

Technical information

▓▓ Current Ratings

The current ratings given on the previous pages are based on the standard conditions of
installation detailed bellows:

Maximum conductor temperature: 90°C

Maximum ambient temperature: In air 30°C
In ground 20°C
Ground thermal resistivity: 1.5K•m/W
Laying depth: 0.8m
Spacing between cable laid: In flat formation 2 times of cable overall diameter
In trefoil with cable touching

Where the site conditions differ from the standard conditions mentioned, it will be necessary
to multiply the tabulated ratings by the actors given in the following tables. These factors are
for variation in ambient ground temperature, soil thermal resistivity and depth of laying. Where
more than one circuit is installed in close proximity, then will be necessary to derate further in
accordance with the group rating factors given.

▓▓ Rating Factors

Cables laid direct in ground:

Variation in ground temperatur
Ground Temperature 15 20 25 30 35 40 45
Cabe Type Rating Factor
All Cables 1.00 0.97 0.93 0.89 0.86 0.82 0.76

Rating factor for depth of laying (To center of cable or trefoil group of cables)
Depth of laying 1.9/3.3KV (1.8/3KV) to 19/33KV (18/30KV) Cables
m Up to 300 mm² Above 300 mm²
0.50 - -
0.60 - -
0.80 1.00 1.00
1.00 0.98 0.97
1.25 0.96 0.95
1.50 0.95 0.94
1.75 0.94 0.92
2.00 0.92 0.90
2.50 0.91 0.89
3.00 or more 0.90 0.88
 Technical Information
Rating factor for variation in thermal resistivity of soil depth
Nom.Cross- Soil thermal resistivity K.m/W
Section Area 0.8 0.9 1.0 1.5 2.0 2.5 3.0
Single
50 1.15 1.11 1.07 0.91 0.81 0.73 0.68
70 1.16 1.12 1.07 0.91 0.81 0.73 0.68
95 1.16 1.12 1.07 0.91 0.81 0.73 0.68
120 1.16 1.12 1.07 0.91 0.81 0.73 0.68
150 1.17 1.12 1.07 0.91 0.81 0.73 0.68
185 1.17 1.12 1.07 0.91 0.81 0.73 0.68
240 1.17 1.12 1.07 0.91 0.80 0.73 0.68
300 1.18 1.12 1.07 0.91 0.80 0.73 0.68
400 1.18 1.12 1.07 0.91 0.80 0.73 0.67
500 1.18 1.12 1.07 0.91 0.80 0.73 0.67
630 1.18 1.12 1.07 0.91 0.80 0.73 0.67
800 1.18 1.12 1.07 0.91 0.80 0.72 0.67
1000 1.18 1.12 1.07 0.91 0.80 0.72 0.67
multicore
16 1.12 1.08 1.05 0.93 0.84 0.77 0.72
25 1.13 1.09 1.05 0.93 0.83 0.77 0.71
35 1.13 1.09 1.06 0.92 0.83 0.76 0.71
50 1.13 1.09 1.06 0.92 0.83 0.76 0.71
70 1.14 1.09 1.06 0.92 0.83 0.75 0.70
95 1.14 1.09 1.06 0.92 0.83 0.75 0.70
120 1.14 1.10 1.06 0.92 0.82 0.75 0.69
150 1.14 1.10 1.06 0.92 0.82 0.75 0.69
185 1.14 1.10 1.06 0.92 0.82 0.74 0.69
240 1.15 1.10 1.07 0.92 0.82 0.74 0.69
300 1.15 1.10 1.07 0.92 0.82 0.74 0.69
400 1.15 1.10 1.07 0.92 0.82 0.74 0.69

Group rating factor for circuits of three single core cables. In trefoil and laid flat touching,
horizontal formation (average values)
Spacing of circuits
No. of
Touching
circuits
Trefoil Laid Flat 0.15m* 0.3m 0.45m 0.6m
2 0.78 0.80 0.81 0.85 0.88 0.90
3 0.66 0.68 0.71 0.76 0.80 0.83
1.9/3.3KV(1.8/3KV)
to 12.7/22KV 4 0.59 0.62 0.65 0.72 0.76 0.80
(12/20KV) Cables
5 0.55 0.58 0.61 0.68 0.73 0.77
6 0.52 0.55 0.58 0.66 0.72 0.76
2 0.79 0.81 0.81 0.85 0.88 0.90
3 0.67 0.70 0.71 0.76 0.80 0.83
19/33KV(18/30KV)
4 0.62 0.65 0.65 0.72 0.76 0.80
Cables
5 0.57 0.60 0.60 0.68 0.73 0.77
6 0.54 0.57 0.57 0.66 0.70 0.76
*This configuration, at 0.15m spacing, may not be practical for the larger size cables.

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 Caledonian Medium Voltage Cables
Group rating factor for multicore cables in horizontal formation (average values)
No. of cables Spacing
in group Touching 0.15m 0.3m 0.45m 0.6m
2 0.80 0.85 0.89 0.90 0.92
3 0.68 0.75 0.80 0.84 0.86
1.9/3.3KV(1.8/3KV)
to 12.7/22KV 4 0.62 0.70 0.77 0.80 0.84
(12/20KV) Cables
5 0.57 0.66 0.73 0.78 0.81
6 0.55 0.63 0.71 0.76 0.80
2 0.80 0.83 0.87 0.89 0.91
3 0.70 0.73 0.78 0.82 0.85
19/33KV(18/30KV)
4 0.64 0.68 0.74 0.78 0.82
Cables
5 0.59 0.63 0.70 0.75 0.79
6 0.56 0.60 0.68 0.74 0.78

Cables laid direct in single way ducts:

(The term “ducts” applies to single earthenware, fibre or plastic pipes).

Variation in ground temperature

Ground Temperature 15 20 25 30 35 40 45
Cabe Type Rating Factor
All Cables 1.00 0.97 0.93 0.89 0.86 0.82 0.76

Rating factor for depth of laying (To center of cable or trefoil group of cables)
Depth of laying 600/1000V cables 1900/3300V to 19000/33000V cables
m Single Core Multicore Single Core Multicore
0.50 1.00 1.00 - -
0.60 0.98 0.99 - -
0.80 0.95 0.97 1.00 1.00
1.00 0.93 0.96 0.98 0.99
1.25 0.90 0.95 0.95 0.97
1.50 0.89 0.94 0.93 0.96
1.75 0.88 0.94 0.92 0.95
2.00 0.87 0.93 0.90 0.95
2.50 0.86 0.92 0.89 0.93
3.00 or more 0.85 0.91 0.88 0.92
 Technical Information
Rating factor for variation in termal resistivity of soil depth
Nom.Cross- Soil thermal resistivity K.m/W
Section Area
mm² 0.8 0.9 1.0 1.5 2.0 2.5 3.0

Single Core
50 1.08 1.06 1.04 0.94 0.87 0.82 0.77
70 1.09 1.06 1.04 0.94 0.87 0.81 0.76
95 1.09 1.06 1.04 0.94 0.87 0.81 0.76
120 1.10 1.07 1.04 0.94 0.86 0.80 0.75
150 1.10 1.07 1.04 0.94 0.86 0.80 0.75
185 1.10 1.07 1.04 0.93 0.86 0.79 0.75
240 1.11 1.07 1.05 0.93 0.86 0.79 0.74
300 1.11 1.08 1.05 0.93 0.85 0.79 0.74
400 1.11 1.08 1.05 0.93 0.85 0.78 0.73
500 1.11 1.08 1.05 0.93 0.85 0.78 0.73
630 1.12 1.08 1.05 0.93 0.84 0.78 0.72
800 1.12 1.09 1.05 0.93 0.84 0.77 0.72
1000 1.13 1.09 1.05 0.93 0.84 0.77 0.71
multicore
16 1.04 1.03 1.02 0.97 0.92 0.88 0.85
25 1.05 1.03 1.02 0.96 0.92 0.88 0.84
35 1.05 1.03 1.02 0.96 0.92 0.87 0.83
50 1.05 1.03 1.02 0.96 0.91 0.87 0.83
70 1.05 1.04 1.02 0.96 0.91 0.86 0.82
95 1.06 1.04 1.02 0.96 0.91 0.86 0.82
120 1.06 1.04 1.03 0.95 0.90 0.85 0.81
150 1.06 1.04 1.03 0.95 0.90 0.85 0.80
185 1.07 1.05 1.03 0.95 0.89 0.84 0.80
240 1.07 1.05 1.03 0.95 0.89 0.84 0.79
300 1.07 1.05 1.03 0.95 0.88 0.83 0.78
400 1.07 1.05 1.03 0.95 0.88 0.83 0.78

Group rating factor for circuits of three single core cables

In trefoil single way ducts, horizontal formation (average values)
Spacing
No. of circuits
Touching 0.45m 0.60m
2 0.85 0.88 0.90
3 0.75 0.80 0.83
1.9/3.3KV(1.8/3KV) to
4 0.70 0.76 0.80
12.7/22KV(12/20KV) Cables
5 0.67 0.73 0.77
6 0.64 0.71 0.76
2 0.85 0.88 0.90
3 0.76 0.80 0.83
19/33KV(18/30KV) Cables 4 0.71 0.76 0.80
5 0.67 0.73 0.77
6 0.65 0.71 0.76

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 Caledonian Medium Voltage Cables
Group rating factor for multicore cables in single way ducts, horizontal formation (average
values)
Spacing
No. of ducts in group
Touching 0.30m 0.45m 0.60m
2 0.88 0.91 0.93 0.94
3 0.80 0.84 0.87 0.89
1.9/3.3KV(1.8/3KV) to
4 0.75 0.81 0.84 0.87
12.7/22KV(12/20KV) Cables
5 0.71 0.77 0.82 0.85
6 0.69 0.75 0.80 0.84
2 0.87 0.89 0.92 0.93
3 0.78 0.82 0.85 0.87
19/33KV(18/30KV) Cables 4 0.73 0.78 0.82 0.85
5 0.69 0.75 0.79 0.83
6 0.67 0.73 0.78 0.82

Cables laid direct in free airs:

Variation in air temperature
Ground Temperature 25 30 35 40 45 50 55
Cabe Type Rating Factor
Cables type up to 3.3KV 1.02 1.00 0.96 0.91 0.87 0.82 0.76
6.6Kv or above 1.00 0.95 0.91 0.86 0.80 0.75 0.69

Effect of grouping cables

No reduction in rating is necessary where there is free circulation of air around the circuits
providing that:

111 The horizontal clearance between circuits is not less than twice the overall diameter of an
individual cable.
222 The vertical clearance between circuits is not less than four times the diameter of an
individual cable.
333 If the number of circuits exceeds three, they are installed in a horizontal plane.
 Technical Information

▓▓ Short Circuit Ratings

Short circuit rating –Copper conductor current in kiloamps

100
90
80 1000 sq mm
70
800 sq mm
60
630 sq mm
50

40 500 sq mm
400 sq mm
30
300 sq mm
Currrnt In KiloAMPS

20 240 sq mm

185 sq mm
150 sq mm

10 120 sq mm
9
8
95 sq mm
7
6
70 sq mm
5

4 50 sq mm

3
35 sq mm
25 sq mm
2

16 sq mm
1
0.1 0.2 0.3 0.4 0.5 0.6 0.8 1.0 2.0 3.0

Duration Of Short Circuit In Seconds

Basis:
1. Cable fully located at start of short circuit. (Conductor temperature: 90°C)
2. Conductor temperature at end of short circuit: 250°C

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 Caledonian Medium Voltage Cables

Short circuit rating –Aluminium conductor current in kiloamps

100
90
80
70
60
1000 sq mm
50
800 sq mm
40
630 sq mm
30
500 sq mm
400 sq mm
Currrnt In KiloAMPS

20
300 sq mm

240 sq mm

10 185 sq mm
9
8 150 sq mm
7
120 sq mm
6
5 95 sq mm

4
70 sq mm
3
50 sq mm

2
35 sq mm
25 sq mm
1 16 sq mm
0.1 0.2 0.3 0.4 0.5 0.6 0.8 1.0 2.0 3.0

Duration Of Short Circuit In Seconds

Basis:
1. Cable fully located at start of short circuit. (Conductor temperature: 90°C)
2. Conductor temperature at end of short circuit: 250°C
 Technical Information

Armour fault current

Nom. Aluminium Wire Armoured Cables Steel Wire Armoured Cables
Cross-
Section 3.8/6.6 6.35/11 3.8/6.6 6.35/11 12.7/22 18/30
8.7/15 12.7/22 18/30
Area (3.6/6) (6/12) (3.6/6) (6/12) 8.7/15KV (12/20) (19/33)
KV (12/20) KV (19/33) KV
mm² KV KV KV KV KV KV
25 7370 10160 11510
35 7800 10830 11960 13090
50 6150 6660 7340 7860 12010 10380 11290 12640 13770 21500
70 6660 7170 7860 10680 12810 11290 12190 13540 14670 22580
95 7170 7690 10410 11210 13350 12190 13320 14450 19710 24010
120 7520 8030 10940 11750 13880 13090 14220 15350 20790 25090
150 8030 10680 11480 12280 18350 13770 14900 16030 21860 25810
185 10680 11480 12280 12810 19190 14900 15800 21860 23300 27240
240 11750 12280 13060 13880 20020 16480 21860 23660 25090 29030
300 12550 13080 13880 18770 21690 22580 23660 25090 26520 30830
400 13880 14150 19190 20020 22940 25090 25810 27240 28670
500 19190 19610 20440 21690 24610
630 21270 21270 22530 23360 26280
800 23360 23360 24610 25450 28790
1000 25450 25450 26700 27530 30870

Wire screen
Nom.Cross-Section Area Maximum dc resistance at 20°C Short Circuit Rating
mm² Ohm/km A
16 1.19 2040
25 0.759 3200
35 0.542 4480
Copper wire applied helically or tape screen applied individually to each screened core, or collectively over laid
up provide an earth fault current path.

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Table Of Contents

I II III IV V

Cable Properties & Construction 03

Cable Machinery & Equipments 05

I
Product Testing 06

Cable Options & Ordering Information 09

Medium Voltage Cables to BS 6622 12

II Single Core Cables To BS 6622 ~
Three Core Cables To BS 6622 30

Medium Voltage Cables to IEC 60502 31

III Single Core Cables To IEC 60502 ~
Three Core Cables To IEC 60502 59

Medium Voltage Cables to VDE 0276 60

IV Single Core Cables To VDE 0276 ~
Three Core Cables To VDE 0276 86

V Technical Information 87
Medium Voltage
Cables