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INDEX Page No.

Forward Introduction 3

Product Range Product Range 7

Section - 1 PVC Insulated Power Cables & Wires 9

Section - 2 Conductor for Overhead Lines 73

Section - 3 Control Cables 77

Section - 4 Flexible Wires and Cables 83

Section - 5 Automobile Wires and Cables 93

Section - 6 Telephone and communication Cable 97

Section - 7 Special Cable 105

Section - 8 Technical Information 109

Section - 9 Glossary of Electrical Terms 121

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(TECHNICAL COLLABORATION )

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INTRODUCTION

The foundation of Allied Group was laid by Mr. Aftab Ahsan in the year 1981, keeping in view the
growing demand of quality product of Manufacturing Copper Rod, Enameled Copper Wire and
Copper Strip. The Group Imported latest Furnace and plant for manufacturing Copper Rod. These
products initially were manufactured under the technical Collaboration of Hitachi Japan.

With the passage of time the Company groomed by providing quality product and making its own
position as market leader. The Company flourished Vertically & horizontally and by Grace of God
today we are the largest Manufacturer of Copper Rod with installed capacity of producing 80,000
Metric Tons per Annum. High Quality (Grade-A) LME Registered Copper Cathode is Continuously
Casted and hot rolled (Micro Processor Controlled) to produce Copper Rod of having purity of
99.99% which is basic raw material for all Wire & Cables Industries which includes House Wiring
Distribution & Power Cables, Enameled Copper Wires & Copper Strip Paper Coated & Bare and
Telephone Cables.

The Copper Rod Produce by us conform to all International Quality Standards.

As stated above we are in the market for over 25 years producing Copper Rod & Copper
Enameled Wire, Our products are widely used in the entire country in almost all Electrical
equipments. It is being tried & considered as most satisfactory product by our valued clients, In
this connection we reproduce on next pages three of the country's largest producers of best
quality equipments in Pakistan namely Siemens Pakistan Engineering Co. Ltd, Phillips Electrical
Indu st ries of (Paki st an) Lt d. and Pak Elekt ron Lt d. pop ul ar ly know n as PEL.

The Company Goal is to accelerate further to use its best quality raw material in Pakistan resulting
in the reduction of cost with quality assurance by providing 99.99% pure quality Copper products
to produce Wire & Cables with the aim to reduce consumption of electricity by providing easy flow
of current with minimum resistance to reduce electricity Bill and optimum performance.

3
S I EM EN S

October 31, 2005

TO WHOM IT MAY CONCERN

This is to certify that we purchased 'MOON STAR' Brand

Copper Enameled Wire from M/S. ALLIED INDUSTRIES HUB
(PVT) LTD., Karachi since 1995.

Our entire requirement for manufacturing of transformer

and motors have been fulfilled by them and we are fully
satisfy for the material supplied by them as per our
specifications.

Further certified that we have not received any complaint

In quality during these years.

S I EM EN S PAKISTAN ENGINEERING CO. LTD

(M.Sohail) (Irfan Umar)

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 PHILIPS
PHILIPS

Philips Electrical Industries of Pakistan Limited

F-54, S.I.T.E., P.O. Box No. 7101, Karachi-75730. Tel: 021-2560071-82 Fax: 021-2563826 / 2562386

Jan 02 , 2003

TO WHOM IT MAY CONCERN

It is certified that we are procuring Enameled Copper Wire under the brand name 'Moon
Star' which is produced and supplied by M/s Allied Industries Hub (Pvt.) Limited,
Karachi.

We have been doing business with M/s Allied Industries since 1996 and maintain that our
entire requirements for Copper Wire have been fulfilled by them over these years with
the material being as per our specifications.

FAISAL RAZI AZEEM

Logistics Officer
Philips Lighting Pakistan

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PAK ELEKTRON LIMITED Works : 14-Km, Ferozepur Road, Lahore-54760, Pakistan.
G. O. O. Box : 1614, Lahore - 54000
Phones: 5811952 - 57 (6 Lines) Telex : 44249 PEL PK.
Grams : PELEKTRON Lahore Fax : 5810156- 5822682
E-mail : c f m @ p e l . i c c i . l h r . e r u m . c o m . p k

No. P&P/- Date 0 8 - 11 - 9 8

To WHOM IT MAY CONCERN

Certified that we have been getting Enamelled

Copper Wire "Moon Star Brand" produced & supplied by
M/s.Allied Industries Hub (Pvt) Limited, Karachi since
1985. We have also been using their Allied Copper Rod for
manufacturing of Copper Strip.

Our entire requirement for manufacturing of

transformers for WAPDA & KESC have been full filled by them
& we found the material to our entire satisfaction,

for PAK ELECTRON LIMITED

(S.M. USMANI)
GENERAL MANAGER PROD. (T&M)

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PRODUCT RANGE
CABLE TYPE Related Standard

1. PVC insulated non-sheathed wires and cables for domestic applications BS 6004
2. PVC insulated and PVC sheathed multicore and flat twin cables and cords BS 6004
3. PVC insulated and PVC sheathed flexible cords BS 6500
4. PVC insulated and PVC sheathed armoured and Unarmoured low voltage BS 6346
cables
5. PVC insulated and PVC sheathed armoured and Unarmoured auxiliary BS 6346
cables (Control cables) Standarded
6. PE insulated and PVC sheathed single or multicore low voltage power BS 5467
cables & IEC 502
7. Control cables (Auxiliary cables) upto 61 cores in solid conductors, BS 6346
armoured or Unarmoured
8. All bare conductors with Aluminum for overhead transmission lines BS 215
(AAC & ACSR)
9. All bare conductors with Copper for overhead transmission BS 125
lines (HDBC)
10. Airfield Lighting Cable.
11. Flat PVC Cables 300/500 volts & 600/1000 Volts

In addition to above standard products we manufacture various types of special cables to meet
customer’s specific requirements.

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D. STANDARD COEFFICIENT OF CONVERSION
ITEMS DESCRIPTIONS
1. LENGTH 1 mil = 0.0254 mm = 0.001 in.
1 mm = 39.37 mils = 0.3937 in.
1 cm = 0.3937 in. = 0.0328 ft.
1 inch = 25.4 mm = 0.083 ft. = 0.0278 yd. = 2.54 cm.
1 feet = 0.305 m = 0.333 yd.
1 yard = 0.914 m = 91.44 cm.
1 meter = 39.37 = = 1.094 yd.
PVC INSULATED POWER CABLES & WIRES
in. 3.28 ft.
10-71
1 kilometer = 2,281 ft. = 1.094 yd. = 0.6213 mile
1 mile = 5,280 ft. = 1.760 yd. = 1.609 = 1.609 km.
2. AREA Page No. 1 MCM = 1000 CM (Circulator Mil) = 0.5067 mm 2 = 1/1000 in 2
SECTION - 1
1 CM = 0.0005067 mm 2 = 0.0000007854 in2 =0.7854 sq. mil
1 mm 2 = 1973 CM = 0.00155 in2 = 1,550 sq. Mil.2
1 in 2 = 1273240 CM = 645.1 mm2 = 0.0069 ft.2
1 yd 2 = 1,296 in 2 = 0.83613 m2
2
1 m2 = 1,550 in 2 = 10.7 ft.2 = 1.195 yd.
1 km 2 = 0.001562 mile 2
1 mile 2 = 27, 880.000 ft 2 = 3,098,000 yd.2 = 2,590,000 m2 =2.59 km2
3. VOLUME 1 cm3 = 0.061 In 3
1 in3 = 16.39 cm 3 = 0.0036 gal = 0.0005787 ft.3
1 I. = 1,000 cm 3 = 61.023 in 3 = 0.2642 gal. = 0.03531 ft.3
1 gal. = 3,785 cm 3 = 231 in 3 = 0.1337 ft.3 = 0.004951 yd3
1 ft.3 = 28,317 cm 3 = 1,728 in 3 = 28.32 i. = 7.48 ga.
1 yd.3 = 46,656 in 3 = 0.7646 m3
1 m3 = 61,023 in 3 = 35.31 ft. 3 = 1.308 yd.3
4. WEIGHT 1 g. = 15.43 gr. = 0.03527 0z. = 0.002205 lb.
1 oz. = 437.5 gr. = 28.35 g. = 0.0625 lb.
1 lb. = 7,000 gr. = 453.6 g. = 16 oz. = 0.4536 kg.
1 kg. = 15,432 gr. = 35.27 oz. = 2.205 ob.
Ton (short) = 2,000 lb = 907.2 kg. = 0.8928 ton (long)
Ton (long) = 2,240 lb. = 1.12 ton (Short) = 1.016 tor (metric)
Ton (metric) = 2,204.62 lb.
Allied Cables
ALLIED CABLES Allied Cables C
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CONTENTS
PVC Insulated Power Cable & Wires Page Nos.

- Description 13
- Cable - Construction 13
- Conductors 13
- Insulation 13
- Core Identification 14
- Fillers / Binder Tape 14
- Bidding 14
- Armour 14
- Finish and Final Protecting Covering 14
- Electrical Testing 14
- Packing 14
- Installation 15
- Cable Support Spacing 15
- Current Rating 15
- Excess Current Protection 15
- Voltage Drop 16
- Conductor Data (Table A-C) 17-18
- Recommendations for the Selection and operation 19
of armoured and un-armoured PVC insulated cables 19
- Motor Circuits 19
- Typical Example of Power Cable Design & Construction 20
- Table for Dimensions and Weights of Power Cable (Tables 1-15) 21-29
- Tables for Current Ratings (Table 16-30) 31-49
- Rating Factors (Table 31-40) 50-59
- Short Circuit Ratings 61-63
- Flat PVC Cable 300/500V and 600/1000V (Table 15) 65-71

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PVC Insulated Power Cable & Wires:-

Description
INTRODUCTION:
Polyvinyl chloride compound (PVC) with its inherit characterstic of toughness and flexibility over a
wide temperature range is used in the manufacture of cables. PVC cables are largely used for indus-
trial type application. They are simple to terminate & joint, handle and have significant record of
trouble-free service.
All the cables design described comply to BS 6346: “PVC insulated cable for electricity Supply” which
specifies requirement for cable for operation at voltages upto and including 3300 volts. It includes
armoured as well as unarmoured cables.

CABLE CONSTRUCTION:
Cables are manufactured to British Standard Specification (BSS) 6346: However cables can be
manufactured to all other international standards and to any special specification and customer
requirements.

CONDUCTORS:
STRANDED COPPER:
These are high conductivity conductors which meet the requirements of BS 6360: “Copper
Conductors in insulated cables and cords (metric units) “ . Where possible conductors are shaped-
compacted to reduce overall cable dimensions and give a smooth profile, While compacting number
and size of wire are changed, therefore conductor sizes should be designated by nominal cross
sectional area rather than by stranding configuration.

STRANDED ALUMINIUM:
These are high purity aluminum and except for single core and the smallest size the conductors are
shaped to produce the most compact design. The material properties and resistance are given in BS
6791: Aluminium Conductors in insulated cables (metric unit)”.

INSULATION:
This consists of extruded, PVC conforming to BS 6746: “PVC Insulation and sheath of Electric
Cables”.

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CORE IDENTIFICATION:
Core identification is by colour as follows:
NUMBER OF CORE: CORE COLOURS:
Single Red or Black
Two Red, Black
Three Red, Yellow, Blue
Four Red, Yellow, Blue, Black
Black denotes the neutral and colours are phase conductors.

Fillers/binder tape:
Polyproplyne fillers are included between laid up cores to give smooth profile and polyproplane
tape as a binder is used over laid up cores.

BEDDING:
The bedding consists of an extruded layer of PVC compound complying with BS 6746:

ARMOUR:
With all armoured cables the direction of lay of the armour is left hand and the size of the armour is
as specified. For multi core cables the armour is a single layer of galvanised steel wires. Single core
cables for use on a.c. Circuits are armoured with non magnetic material eg, aluminium.

FINISH AND FINAL PROTECTIVE COVERING

The final protective covering for all cables consists of an extruded, black (unless specified) PVC
oversheath which conforms to BS 6346: for thickness and to BS 6746: for properties.
The external surface is embossed with the voltage designation.

ELECTRICAL TESTING:
At the insulation stage all cores are spark tested according to conductor size & cable voltage.
Finished cables have to pass a.c. Voltage withstand test.
PACKING
Cables are packed on wooden drums of suitable size to meet minimum bending radius criteria.
Drums are duly lagged to protect cable being damaged during transportation. For convenience at
the installation sites drums are marked with the “Direction of Rotation” instruction. To prevent
ingress of moisture both ends of cable are capped and the ends are marked red and green. At red
mark the sequence of cores is clock wise i.e. Red, Yellow, Blue & Black. At green mark the sequence
of cores is counter clock wise i.e. Black, Yellow, Red.

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INSTALLATION:
MINIMUM INSTALLATION RADIUS:
During installation care must be taken and cable should not be sent to a radius smaller than eight
times the overall diameter.
MINIMUM INSTALLATION TEMPERATURE:
To avoid risk of damage during installation, the cable should be installed only when both the cable and ambient
temperatures are above 0 C and have been so far for the previous 24 hours, or where precautious have been
taken to maintain the cable above this, temperature.

CABLE SUPPORT SPACING:

The following tables give the recommended spacing of supports for cables covered by this publication they are,
where possible, in line with the metric edition of the 14th issue of the IEE wiring regulations for the Electrical
Equipment of Buildings and the dimensional range has been extended so as to include a greater number of
cable size.
STRANDED COPPER CONDUCTOR CABLES
SUPPORT SPACING
OVERALL CABLE DIAMETER HORIZONTAL*MM VERTICAL MM
MM
Utp 15 350 450
15 to 20 400 550
20 to 40 450 600
40 to 60 700 900
Above 60 1100 1300
STRANDED ALUMINIUM CONDUCTOR CABLES
OVERALL CABLE DIAMETER HORIZONTAL **MM VERTICAL MM
MM
15 to 20 1200 550
20 to 40 2000 600
40 to 60 3000 900
Above 60 4000 1300

* The spacings in the table are in accordance with the related IEE Wiring Regulations. If compliance with
these regulations is not required, the spacings may be increased for cables above 15mm diameter by 50%
** These spacings (allowing for a 20% sag in each span) can be adopted withour risk of damage to the cable.
Where regulations or other circumstances dictate, shorter spacings can be used.
CURRENT RATINGS:
Electrical Research Association (ERA) has calculated sustained current ratings for PVC insulated
cables manufactured to BS 6346: and has published its findings in ERA Report 69-30 Part III
Sustained Current Ratings for PVC insulated cables to BS 6349: . The current ratings given on
the following pages (for ac circuits at 50 Hz) have been extracted from this ERA report and are
chosen, to provide data on three common methods of cable installation namely laid direct in the
ground, laid under ground ducts and installed in air. DC current rating are also given in the ERA
report.
For single core cables ratings of various dispositions have been given. Regulation of the
IEE prohibits the use of single core cables armoured with steel wire on ac systems.
When single core cable is armoured the non-magnetic armour will be solidly bonded at both ends of,
the cable run. However for short distances it may be single point bonding in which case standing voltages
will occur along the armoured and consideration should be given to the values that will be attained both
under normal and fault conditions.
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EXCESS CURRENT PROTECTION:

PVC Insulated cables may be severely damaged if subjected to temperatures higher than those permissible for continuous
operation. Therefore current rating of PVC insulated cable is determined not only by the maximum conductor temperature
admissible for continuous running, but also by the temperature likely to be attained under conditions of excess current.

The ratings given in the catalogue are for cables having “Close excess current” protection as defined below. Where “Coarse
excess current” protection is employed, the factors given must be applied to the tabulated ratings to determine the maximum
continous ratings of the cables.

1. CLOSE EXCESS CURRENT PROTECTION*

The excess-current protection device which is employed shall operate within 4 hours if a current 30% in excess of the
maximum continous rated value is sustained for cables laid direct in the ground, or if a current 50% in excess of the
maximum continous rated value is sustained for cables laid in ducts or installed in air. Devices for close excess-current
protection include:
(a) BS 88 fuses fitted with fuse links marked to indicate a class P or class Q1 fusing factor.
(b) Fuses fitted with fuse links copying with BS 1361.
(c) Moulded case and miniature circuit beakers complying with BS 3871.
(D) circuit breakers set to operate at an overload not exceeding 1.3 times the designated load
current of the circuit when laid direct or 1.5 times the designated load current of the circuit
when laid in ducts or installed in air.

2. COARSE EXCESS-CURRENT PROTECTION*:

The excess-current protection device which is used will not operate within 4 hours as detailed in (1)
Devices for coarse-excess current protection include:

(a) BS 88 fuses fitted with fuse-links marked to indicate a class Q2 or Class R fusing factor.
(B) Semi-enclosed (rewirable) fuses copying with BS 3036.

NOTE:
Where coarse excess-current protection is employed the tabulated current ratings must be
multiplied by the following factors. Cable in air or ducts................................................0.75.
Cables laid direct in the ground......................................................................................0.65.

VOLTAGE DROP:
It is only of importance where cables of voltage rating of upto 600/1000 V are incorporated the voltage drop for any
particular cable run must be such that the total voltage drop in the circuit does not exceed 2.5% of the nominal voltage.

Values of voltage drop are tabulated for a current of one appeare for a one ampere run i.e. For a distance of one metre
along the route taken by the cables, and represent the result of the voltage drops in all the circuit conductors. For balanced
three phase a.c. Circuits the values relate to the line voltage. For any given run the values need to be multiplied by the length
of the run in metres and by the current in ampere. If Vd is the voltage drop in volts:
Then VD= mVxlxL or mV = Vdx1000
1000 IXL

Where I = Current in Amperes.

L = Route length in metres.
mV = Approximate volt drop/ampere/metre.
When actual current varies, voltage drop values thus calculated are approximate only. For a more accurate assesment
change in conductor resistance with operating temperature is to be taken into account. Ideally the volt drop values should
be for worst condition in which case the phase angle of the load is equal to that of the cable. However in many cases phase
angle of the load is not readily available. For cables upto cross section area of 120mm2 the tabulated voltage drop values
apply with sufficient accuracy where the power factor of the load lies between 0.6 to 1 lagging, and for larger cables where
the power factor of the load does not exceed 0.8 lagging. In cases outside this range the tabulated voltage values may be
unduly conservative and more exact calculations are necessary.

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Conductor data
Standard Equivalent areas Equivalent American sizes Maximum de resistance Standard
metric size and former metric size and equivalent areas of single core cable metric size
imperial sizes at 20 C
Aluminium Plain copper
2 2 2
mm inch 2 mm MCM B&S& ohm/km ohm/km mm
AWG
__ 0.002 _ _ 23.0 14.0 _
1.3
1.5 0.0023 _ 3.0 _ 19.7 13.3 1.5
__ 0.003 _ _ 14.9 9.11 _
1.94
__ _ 14 _
2.1 4.1 14.1 8.60
2.5 _ 4.9 _ 2.5
0.0038 11.8 7.27
_ 0.0045 2.9 _ _ 9.83 6.00 _
_ _ 3.3 6.5 12 8.90 5.42 _
4 0.0061 _ 7.7 _ 7.39 4.52 4
_ 0.007 4.5 _ _ 6.38 3.89 _
_ _ 5.3 10.4 10 5.59 3.41 _
0.0092 _ 11.5 _ 4.91 3.02 6
6 _ _
_ 8.4 16.5 8 3.51 2.15
_ 0.0145 9.5 _ _ 3.06 _
1.86
0.016 _ 19.4 _ 2.94 10
10 _ 1.79 _
_ 13 26.2 6 2.21 1.35
_ 0.0225 _ _ 2.02 1.23 _
15
16 0.025 _ 30.8 _ 1.85 1.13 16
_ _ 41.7 4 1.39 8.847 _
21
25 0.038 _ 48.9 _ 1.18 0.712 25
_ _ _ _
0.04 25 1.13 0.688
_ _ _
34 66.4 2 0.873 0.532
35 0.053 _ 67.7 _ 0.851 0.514 35
_ _ _ _
_ 0.06 40 0.745 0.454
_ 42 83.7 _
1 0.693 0.422
50 0.072 _ _ 50
91.6 0.628 0.379
_ _ _
53 106 1/0 0.549 0.335
_ 0.1 _ _ _
65 0.443 0.270
70 0.104 _ 132 _ 0.435 0.262 70
_ _ _
67 133 2/0 0.435 0.266
_ _ _
85 168 3/0 0.345 0.211
95 0.144 _ 184 _ 0.313 0.189 95
_ 0.15 95 _ _ 0.302 0.184 _
_ _ 107 212 4/0 0.274 0.167 _
120 0.182 _ 232 _ 0.248 0.150
_ 0.2 125 _ _ 0.228 0.139 _
150 0.224 _ 285 _ 0.202 0.122 150
_ 0.25 160 _ _ 0.181 0.111 _
185 0.281 _ 357 _ 0.161 0.0972 185
_ _ _ _
0.3 195 0.148 0.0902
240 0.369 _ 469 _ 0.122 0.0740 240
_ _ _ _
0.4 260 _ 0.110 0.0671
300 0.463 _ 589 0.0976 0.0590 300
_ _ _ _
0.5 320 _ 0.0896 0.0547
400 0.592 _ 753 0.0763 0.0461 400
_ _ _ _
0.6 390 0.0737 0.0450
_ _
500 0.746 950 _ 0.0605 0.0366 500
480 _
_ 0.75 _ _ 0.0601 0.0367 _
630 0.963 1226 _ 0.0469 0.0283 630
670 _
_ 1.0 _ _ 0.0431 0.0263 _
800 1.23 _ 1568 _ 0.0367 0.0221 800
1000 1.55 1977 0.0291 0.0176 1000
For multicore cables__multiply resistance given by 1.02
Circular mils X 1000
1.5 and 2.5 mm2 copper conductors are solid circular
Resistance values given are for solid aluminum and stranded copper conductors, and are based on:
Standard metric sizes__BS 6360 : and 6791 :
Standard imperial sizes __BS 3360 : and BS 2791 :
Standard MCM sizes___IEC Publication No. 228
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CONDUCTOR RESISTANCE
TABLE B

MAXIMUM D.C. RESISTANCE OF ALLIED CONDCUCTOR AT 20 C

Standard Plain Copper Aluminium
Metric Size
mm2 Ohm/Km Ohm/Km

12.10 _
1.5 _
2.5 7.41 _
4 4.61
6 3.08 4.99
10 1.83 2.96
16 1.15 1.87
25 0.727 1.18
35 0.524 0.850
50 0.387 0.628
70 0.268 0.435
95 0.193 0.313
120 0.153 0.248
150 0.124 0.202
185 0.0991 0.161
240 0.0754 0.122
300 0.0601 0.0976
400 0.0470 0.0763
500 0.0366 0.0605
630 0.0283 0.0469
800 0.0221 0.0367
1000 0.0176 0.0291

For copper, the table is based on BS 6360 for Aluminium, the table is based on BS 6791.
To obtain the maximum resistance of hard drawn conductors divide resistance given by 0.97.
Correction Factor for Correcting the Conductor Resistance
to a Temperature of 20 C
TABLE C
Temperature Correction Temperature Correction
at time of factor at time of factor
Measurement K Measurement K

0 1.085 21 0.996
1 1.080 22 0.992
2 1.076 23 0.988
3 1.071 24 0.985
4 1.067 25 0.981
5 1.062 26 0.977
6 1.058 27 0.973
7 1.053 28 0.970
8 1.049 29 0.966
9 1.045 30 0.962
10 1.041 31 0.959
11 1.036 32 0.955
12 1.032 33 0.952
13 1.028 34 0.948
14 1.024 35 0.945
15 1.020 36 0.941
16 1.016 37 0.938
17 1.012 38 0.934
18 1.008 39 0.931
19 1.004 40 0.928
20 1.000

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Recommendations for the selection and operation

of armoured and un-armoured PVC insulated cables:

Bright wire-armoured cables: Bright wire armour (3) (Applies to ac systems only.) The natural
without further covering should only be used for point is earthed through an ore suppression
cables to be installed in air in non-corrosive coil, with arrangements for isolation within an
atmospheres. hour of the occurrence of a fault.
For systems in this category, the rated voltage
Voltage readings: The selection of standard cables of Eo is the voltage to netural of the cable should
appropriate voltage designation for particular not be less than the system voltage to natural
systems depends on the type of system and on or mid-point, and the rated voltage E of the
the system earthing arrangements. For this pur- cable should be not less that the
pose, systems have been divided into two cate system voltage between lines.
gories, as follows:

(1) The netural point or mid-point connection

is earthed in such a manner that, even under fault
conditions, the maximum voltage that can occur
between any conductor and earth does not ex-
ceed 0.8E. For systems in this category, both the rated
voltages E and Eo of the cable should be not less
(2) A devices is installed for automatically and than the system voltage between lines.
instantly cutting our any part of the system that

MOTOR CIRCUITS :
IEE Wiring Regulation 522-8 requires that they be
When selecting a conductor size for use in a motor provided with control apparatus which includes a
circuit it should be chosen so that the voltage at the excess current in the motor, or in the cable be-
terminals of the motor, when running under full tween the device and the motor.
load, is not less than 97.5 per cent of the voltage at
the consumer’s supply terminals (i.e. 2.5 per cent
volt drop in compliance with IEE Wiring Due to these protection requirements it may be
Regulations, thought that the cable in sub-circuit feeding the
motor needs to be appreciably larger than that re-
A note to this regulation also points out that in quired for the normal full load motor circuits. In
certain cases it may be necessary to restrict the practice, however, it is often possible to avoid this
voltage drop to a smaller value to ensure a adequate need by the correct selection of circuit breaker or
starting and accelerating torque. Care must be taken by a fuse having a suitable time-delay characteris-
to ensure that the fuse protecting the final sub-circuit tic. In this respect it is advisable to obtain guidance
which supplies the motor can cope with the starting from the manufacturer of the protection equipment
currents. In all cases where motors have a rating
exceeding ½ hp,

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Typical example of cable design and construction

Three core cable, single wire armoured and PVC oversheathed

1 Shaped stranded copper conductor

2 PVC insulation
3 Extruded bedding
4 Galvanized Steel sire armour
5 PVC oversheath

1 2 3 4 5

Four core cable, single wire, armoured and PVC oversheathed

1 Shaped stranded copper conductor

2 PVC insulation
3 Extruded bedding
4 Galvanized Steel wire armour
5 PVC oversheath

1 2 3 4 5
HOW TO ORDER
Data to be given in specifications for ordering cable:-
1. Length of cable required and individual drum length, if necessary.
2. Conductor size where applicable, size of reduced neutral conductor.
3. Conductor material (i.e Aluminium or Copper).
4. Number of cores
5. Type of Bedding
7. Type of Sheath. 8) Type of Finish. 9) Type of Armour.
10. Relvealnt British Standard or any other International Standard.
11. Voltage designation.
12. Any other special requirement.

EXAMPLE:-
1500 meters (3 x 500 m) 120 mm2 Stranded Aluminum three core, Shaped conductors, PVC
Insulated extruded, PVC bedded (Single Wire armoured) extruded PVC Sheathed overall, BS
6346: 600 / 1000 volts

20
 C Allied Cables ALLIED CABLES
Allied Cables

TABLES FOR DIMENSIONS AND WEIGHTS OF POWER CABLES Page No.

Table 1 600/1000 V Single Core CU/PVC/PVC 22

Table 2 600/1000 V Single Core CU/PVC/AWA/PVC 22

Table 3 600/1000 V Single Core CU/PVC/PVC 23

Table 4 600/1000 V Single Core CU/PVC/AWA/PVC 23

Table 5 600/1000 V Two Core CU/PVC/SWA/PVC 24

Table 6 600/1000 V Two Core CU/PVC/SWA/PVC 24

Table 7 600/1000 V Two Core CU/PVC/PVC 25

CU/PVC/SWA/PVC

Table 8 600/1000 V Three Core AL/PVC/PVC 25

AL/PVC/SWA/PVC

Table 9 600/1000 V Four Core CU/PVC/PVC 26

CU/PVC/SWA/PVC

Table 10 600/1000 V Four Core AL/PVC/PVC 26

AL/PVC/SWA/PVC

Table 11 600/1000 V Four Core with reduced Neutral Conductor (3 1/2 Core)

CU/PVC/PVC 27

Table 12 600/1000 V Single Core CU/PVC/PVC 27

CU/PVC/AWA/PVC

Table 13 600/1000 V Single Core AL/PVC/PVC 28

AL/PVC/AWA/PVC

Table 14 600/1000 V Three Core CU/PVC/SWA/PVC 28

Table 15 600/1000 V Three Core AL/PVC.SWA/PVC 29

21
 C Allied Cables ALLIED CABLES
Allied Cables

600/1000V - SINGLE CORE

STRANDED COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES.
(Cu/PVC/PVC)
TABLE 1
NOMINAL AREA THICKNESS OF THICKNESS OF APPROXIMATE APPROXIMATE
OF CONDUCTOR INSULATION OUTER SHEATH OVERALL CABLE WEIGHT
DIAMETER
5q mm mm mm mm Kg/10.0mm
1.0* 0.6 0.8 4.0 5.5
1.5* 0.6 0.8 4.5 6.2
1.5 0.6 0.8 4.5 6.4
2.5* 0.7 0.8 5.0 7.5
2.5 0.7 0.8 5.0 7.7
4 0.8 0.8 6.3 10.5
6 0.8 0.9 6.8 13.0
10 1.0 1.4 8.1 17.5
16 1.0 1.4 11.1 24.0
25 1.2 1.4 12.9 34.5
35 1.2 1.4 14.0 45.0
50 1.4 1.4 15.1 60.0
70 1.4 1.4 16.9 81.0
95 1.6 1.5 19.4 110.0
120 1.6 1.5 21.0 135.0
150 1.8 1.6 23.2 165.0
185 2.0 1.7 25.8 206.0
240 2.2 1.8 29.0 267.0
300 2.4 1.9 32.1 332.0
400 2.6 2.0 35.8 419.0
500 2.8 2.1 39.6 523.0
630 2.8 2.2 43.8 663.0
800 2.8 2.3 48.3 833.0
1000 3.0 2.5 53.7 1044.0

* SOLID CONDUCTORS
CABLE CONFORMS TO BS 6346: & IEC 502-

600/1000V_SINGLE CORE
STRANDED COPPER CONDUCTOR PVC INSULATED
ALUMINUM WIRE ARMOURED
PVC SHEATHED CABLES
(Cu/PVC/AWA/PVC) TABLE 2
NOMINAL THICKNESS THICKNESS THICKNESS
AREA OF OF ARMOUR APPROXIMATE APPROXIMATE
CONDUC- OF EXTRUDED WIRE OF OVERALL CABLE WEIGHT
TOR INSULATION BEDDING DIAMETER OVERSHEATH DIAMETER

Sq mm mm mm mm mm mm Kg/100m
50 1.4 0.8 1.25 1.5 19.1 78
70 1.4 0.8 1.25 1.6 21.1 103
95 1.6 0.8 1.25 1.6 23.4 133
120 1.6 1.0 1.6 1.7 26.3 168
150 1.8 1.0 1.6 1.7 28.3 200
185 2.0 1.0 1.6 1.8 30.8 243
240 2.2 1.0 1.6 1.9 34.1 309
300 2.4 1.0 1.6 1.9 37.0 377
400 2.6 1.2 2.0 2.1 42.0 483
500 2.8 1.2 2.0 2.1 45.6 592
630 2.8 1.2 2.0 2.2 49.7 742
800 2.8 1.4 2.5 2.4 55.8 950
1000 3.0 1.4 2.5 2.5 61.0 1176
CABLE CONFORMS TO BS 6346
22
 C Allied Cables ALLIED CABLES
Allied Cables

600/1000V - SINGLE CORE

STRANDED ALUMINIUM CONDUCTOR
PVC INSULATED PVC SHEATHED CABLES
(AL/PVC/PVC) TABLE-3

NOMINAL AREA THICKNESS OF THICKNESS OF APPROXIMATE APPROXIMATE

OF CONDUCTOR INSULATION OVERSHEATH OVERALL CABLE
DIAMETER WEIGHT
Sq mm mm mm mm Kg/100m
50 1.4 1.4 15.1 28
70 1.4 1.4 16.9 36
95 1.6 1.5 19.4 48
120 1.8 1.5 21.0 57
150 2.0 1.6 23.2 69
185 2.2 1.7 25.8 86
240 2.4 1.8 29.0 109
300 2.6 1.9 32.1 134
400 2.8 2.0 35.8 167
500 2.8 2.1 39.6 206
630 2.8 2.2 43.8 244
800 2.8 2.3 48.3 294
1000 3.0 2.5 53.7 375

600/1000V - SINGLE CORE

STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
ALUMINIUM WIRE ARMOURED
PVC SHEATHED CABLES
(AL/PVC/AWA/PVC) TABLE-4

NOMINAL THICKNESS THICKNESS ARMOUR THICKNESS APPROXIMATE APPROXIMATE

AREA OF OF OF WIRE OF OVERALL CABLE
CONDUC ANSULATION EXTRUDED DIAMETER OVERSHEATH DIAMETER WEIGHT
TOR BEDDING
Sq mm mm mm mm mm mm Kg/100m
50 1.4 0.8 1.25 1.5 19.1 66
70 1.4 0.8 1.25 1.6 21.1 79
95 1.6 0.8 1.25 1.6 23.4 95
120 1.6 1.0 1.6 1.7 26.3 125
150 1.8 1.0 1.6 1.7 28.3 143
185 2.0 1.0 1.6 1.8 30.8 166
240 2.2 1.0 1.6 1.9 34.1 198
300 2.4 1.0 1.6 1.9 37.0 230
400 2.6 1.2 2.0 2.1 42.0 303
500 2.8 1.2 2.0 2.1 45.6 355
630 2.8 1.2 2.0 2.2 49.7 404
800 2.8 1.4 2.5 2.4 55.8 515
1000 3.0 1.4 2.5 2.5 61.0 624

23
 C Allied Cables ALLIED CABLES
Allied Cables

600/1000V - TWO CORE

STRANDED COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (Cu/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWA/PVC) TABLE 5
UN ARMOURED ARMOURED
NOMINAL
AREA OF THICKNESS
OF APPROXIMATE APPROXIMATE ARMOUR APPROXIMATE APPROXIMATE
CONDUC- OVERALL CABLE WIRE OVERALL CABLE
TOR INSULATION
DIAMETER WEIGHT DIAMETER DIAMETER WEIGHT

Sq mm mm mm Kg/100m mm mm Kg/100m
1.5* 0.6 - - 0.9 11.7 28
2.5* 0.7 - - 0.9 13.1 35
4** 0.8 - - 0.9 15.1 46
6** 0.8 - - 0.9 16.5 55
10** 1.0 - - 1.25 20.1 88
16 1.0 15.6 47 1.25 18.9 84
25 1.2 18.4 69 1.6 23.0 128
35 1.2 20.1 95 1.6 24.9 161
50 1.4 22.8 126 1.6 27.8 201
70 1.4 25.5 170 1.6 30.4 252
95 1.6 29.3 231 2.0 35.5 352
120 1.6 31.8 288 2.0 38.0 420
150 1.8 35.1 352 2.0 41.3 496
185 2.0 39.1 439 2.5 46.4 639
240 2.2 43.9 576 2.5 51.2 802
300 2.4 48.7 716 2.5 56.4 971
400 2.6 54.2 904 2.5 61.9 1185
*CIRCULAR SOLID CONDUCTOR
**CIRCULAR STRANDED CONDUCTORS. CONDUCTORS OF 16 Sq mm AND ABOVE ARE
SHAPED STRANDED.
600/1000V - TWO CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (AL/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (AL/PVC/SWA/PVC) TABLE 6
UNARMOURED ARMOURED
NOMINAL
AREA OF THICKNESS
OF APPROXIMATE APPROXIMATE ARMOUR APPROXIMATE APPROXIMATE
CONDUC- INSULATION OVERALL CABLE WIRE OVERALL CABLE
TOR DIAMETER WEIGHT DIAMETER DIAMETER WEIGHT

Sq mm mm mm Kg/100m mm mm Kg/100m
16 1.0 15.6 23 1.25 18.9 65
25 1.2 18.4 38 1.6 23 98
35 1.2 20.1 53 1.6 24.9 119
50 1.4 22.8 69 1.6 27.8 144
70 1.4 25.5 87 1.6 30.4 170
95 1.6 29.3 116 2.0 35.5 238
120 1.6 31.8 137 2.0 38.0 271
150 1.8 35.1 165 2.0 41.3 311
185 2.0 39.1 206 2.5 46.4 406
240 2.2 43.9 270 2.5 51.2 496
300 2.4 48.7 332 2.5 56.4 587
400 2.6 54.2 413 2.5 61.9 694

CONDUCTORS ARE SHAPED STRANDED

24
 C Allied Cables ALLIED CABLES
Allied Cables

600/1000V - THREE CORE

STRANDED COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (Cu/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWA/PVC) TABLE 7
UN ARMOURED ARMOURED
NOMINAL
AREA OF THICKNESS
CONDUC- OF APPROXIMATE APPROXIMATE ARMOUR APPROXIMATE APPROXIMATE
TOR INSULATION OVERALL CABLE WIRE OVERALL CABLE
DIAMETER WEIGHT DIAMETER DIAMETER WEIGHT

Sq mm mm mm Kg/100m mm mm Kg/100m
1.5* 0.6 - - 0.9 12.3 31
2.5* 0.7 - - 0.9 13.6 39
4** 0.8 - - 0.9 15.8 52
6** 0.8 - - 1.25 18.0 73
10** 1.0 - - 1.25 21.2 101
16 1.0 17.2 67 1.25 20.6 108
25 1.2 20.4 100 1.6 25.0 167
35 1.2 22.4 130 1.6 27.3 205
50 1.4 25.5 172 1.6 30.5 258
70 1.4 28.7 236 2.0 35.0 359
95 1.6 33.3 333 2.0 39.3 471
120 1.6 36.3 410 2.0 42.2 559
150 1.8 40.0 502 2.5 47.5 711
185 2.0 44.6 626 2.5 51.9 854
240 2.2 50.1 815 2.5 57.8 1079
300 2.4 55.6 1014 2.5 63.2 1304
400 2.6 62.0 1286 2.5 69.6 1602

*CIRCULAR SOLID CONDUCTOR

**CIRCULAR STRANDED CONDUCTORS. CONDUCTORS OF 16 Sq mm AND ABOVE ARE
SHAPED STRANDED.
600/1000V - TWO CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (AL/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (AL/PVC/SWA/PVC)
TABLE 8
UN ARMOURED ARMOURED
NOMINAL
AREA OF THICKNESS APPROXIMATE APPROXIMATE ARMOUR APPROXIMATE APPROXIMATE
CONDUC- OF OVERALL CABLE WIRE OVERALL CABLE
TOR INSULATION DIAMETER WEIGHT DIAMETER DIAMETER WEIGHT

Sq mm mm mm Kg/100m mm mm Kg/100m

16 1.0 17.2 38 1.25 20.6 79

25 1.2 20.4 54 1.6 25.0 121
35 1.2 22.4 66 1.6 27.3 142
50 1.4 25.5 90 1.6 30.5 176
70 1.4 28.7 112 2.0 35.0 236
95 1.6 33.3 160 2.0 39.3 299
120 1.6 36.3 182 2.0 42.2 342
150 1.8 40.0 235 2.5 47.5 446
185 2.0 44.6 290 2.5 51.9 520
240 2.2 50.1 344 2.5 57.8 640
300 2.4 55.6 460 2.5 63.2 752

CONDUCTORS ARE SHAPED STRANDED

25
 C Allied Cables ALLIED CABLES
Allied Cables

600/1000V - FOUR CORE

STRANDED COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (Cu/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWA/PVC) TABLE 9
UN ARMOURED ARMOURED
NOMINAL THICKNESS
AREA OF
CONDUC- OF APPROXIMATE APPROXIMATE ARMOUR APPROXIMATE APPROXIMATE
TOR INSULATION OVERALL CABLE WIRE OVERALL CABLE
DIAMETER WEIGHT DIAMETER DIAMETER WEIGHT

Sq mm mm mm Kg/100m mm mm Kg/100m
1.5* 0.6 - - 0.9 13.3 35
2.5* 0.7 - - 0.9 14.5 44
4** 0.8 - - 1.25 17.8 71
6** 0.8 - - 1.25 19.2 85
10** 1.0 - - 1.25 22.8 120
16 1.0 19.3 86 1.6 23.9 149
25 1.2 22.9 129 1.6 27.8 205
35 1.2 25.4 169 1.6 30.5 253
50 1.4 29.2 225 2.0 35.4 348
70 1.4 33.0 310 2.0 39.2 447
95 1.6 38.3 436 2.0 44.3 590
120 1.6 41.8 538 2.5 49.3 754
150 1.8 46.3 663 2.5 53.6 987
185 2.0 51.3 825 2.5 59.0 1089
240 2.2 58.0 1073 2.5 65.7 1369
300 2.4 64.6 1338 2.5 72.0 1661
400 2.6 72.0 1693 3.15 81.3 2148

*CIRCULAR SOLID CONDUCTOR

**CIRCULAR STRANDED CONDUCTORS. CONDUCTORS OF 16 Sq mm AND ABOVE ARE
SHAPED STRANDED.
600/1000V - FOUR CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (AL/PVC/PVC)
AND SINGLE (STEEL) WIRE ARMOURED
PVC SHEATHED CABLES (AL/PVC/SWA/PVC) TABLE 10
UN ARMOURED ARMOURED
NOMINAL THICKNESS
AREA OF APPROXIMATE APPROXIMATE ARMOUR APPROXIMATE APPROXIMATE
CONDUC- OF
INSULATION OVERALL CABLE WIRE OVERALL CABLE
TOR DIAMETER WEIGHT DIAMETER DIAMETER WEIGHT

Sq mm mm mm Kg/100m mm mm Kg/100m
16 1.0 19.3 48 1.6 23.9 111
25 1.2 22.9 64 1.6 27.8 144
35 1.2 25.4 84 1.6 30.5 169
50 1.4 29.2 113 2.0 35.4 240
70 1.4 33.0 145 2.0 39.2 283
95 1.6 38.3 206 2.0 44.3 361
120 1.6 41.8 248 2.5 49.3 465
150 1.8 46.3 306 2.5 53.6 542
185 2.0 51.3 378 2.5 59.0 644
240 2.2 58.0 485 2.5 65.7 783
300 2.4 64.6 599 2.5 72.0 924

CONDUCTORS ARE SHAPED STRANDED

26
 C Allied Cables ALLIED CABLES
Allied Cables

600/1000V - ( 3 ½ CORE)
STRANDED COPPER CONDUCTOR PVC INSULATED CONDUCTOR ( 3 ½ CORE)
PVC SHEATHED CABLES (Cu/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWA/PVC) TABLE 11
UN ARMOURED ARMOURED
NOMINAL NOMINAL THICKNESS APPROXI- APPROXI- ARMOUR APPROXI- APPROXI-
AREA OF AREA OF OF MATE MATE WIRE MATE MATE
CONDUC- NEUTRAL INSULATION OVERALL CABLE DIAMETER OVER ALL CABLE
TOR CONDUC- DIAMETER WEIGHT DIAMETER WEIGHT
TOR
Sq mm Sq mm mm mm Kg/100m mm mm Kg/100m

25 16 1.2 22.9 126 1.6 27.8 202

35 16 1.2 24.7 159 1.6 29.5 243
50 25 1.4 28.3 212 1.6 33.1 305
70 35 1.4 32.0 289 2.0 38.0 422
95 50 1.6 37.5 392 2.0 43.7 456
120 70 1.6 41.4 489 2.5 49.0 699
150 70 1.8 44.7 590 2.5 52.0 818
185 95 2.0 49.9 740 2.5 57.2 991
240 120 2.2 56.0 959 2.5 63.7 1247
300 150 2.4 62.2 1191 2.5 69.8 1508
300 185 2.4 64.2 1219 2.5 71.8 1536
400 185 2.6 69.6 1507 3.15 78.6 1947

ALL PHASE CONDUCTORS ARE SHAPED STRANDED

ALL NETURAL CONDUCTORS ARE CIRCULAR STRANDED
1900/3300V- SINGLE CORE
STRANDED COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLE (Cu/PVC/PVC)
AND SINGLE ALUMINIUM WIRE ARMOURED
PVC SHEATHED CABLE (Cu/PVC/AWA/PVC)
TABLE 12
UN ARMOURED ARMOURED
NOMINAL THICKNESS
AREA OF
CONDUC- OF APPROXIMATE APPROXIMATE ARMOUR APPROXIMATE APPROXIMATE
TOR INSULATION OVERALL CABLE WIRE OVERALL CABLE
DIAMETER WEIGHT DIAMETER DIAMETER WEIGHT

Sq mm mm mm Kg/100m mm mm Kg/100m
50 2.2 16.8 66 1.25 21.0 87
70 2.2 18.8 89 1.25 22.8 111
95 2.2 20.7 116 1.6 26.0 149
120 2.2 22.6 143 1.6 27.6 177
150 2.2 24.1 171 1.6 29.4 207
185 2.2 26.2 209 1.6 31.3 247
240 2.2 29.0 267 1.6 34.1 309
300 2.4 32.1 332 1.6 37.0 377
400 2.6 35.8 419 2.0 42.0 483
500 2.8 39.6 523 2.0 45.6 592
630 2.8 43.8 663 2.0 49.7 742
800 2.8 48.3 833 2.5 55.8 850
1000 3.0 53.7 1044 2.5 61.0 1176

CONDUCTORS ARE SHAPED STRANDED

27
 C Allied Cables ALLIED CABLES
Allied Cables

1900/3300V - SINGLE CORE

STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (AL/PVC/PVC)
AND SINGLE ALUMINIUM WIRE ARMOURED
PVC SHEATHED CABLES (AL/PVC/AWA/PVC)
TABLE 13
UN ARMOURED ARMOURED
NOMINAL THICKNESS
AREA OF APPROXIMATE APPROXIMATE ARMOUR APPROXIMATE APPROXIMATE
CONDUC- OF
TOR INSULATION OVERALL CABLE WIRE OVER ALL CABLE
DIAMETER WEIGHT DIAMETER DIAMETER WEIGHT

Sq mm mm mm Kg/100m mm mm Kg/100m
50 2.2 16.8 34 1.25 21.0 77
70 2.2 18.8 44 1.25 22.8 90
95 2.2 20.7 54 1.6 26.0 122
120 2.2 22.6 63 1.6 27.6 136
150 2.2 24.1 74 1.6 29.4 151
185 2.2 26.2 88 1.6 31.3 170
240 2.2 29.0 109 1.6 34.1 198
300 2.4 32.1 134 1.6 37.0 230

CONDUCTORS ARE CIRCULAR STRANDED

1900/3300V - THREE CORE

STRANDED COPPER CONDUCTOR PVC INSULATED
SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWA/PVC)
TABLE 14
NOMINALAREA THICKNESS OF
ARMOUR APPROXIMATE APPROXIMATE
OF CONUCTOR INSULATION WIRE OVERALL CABLE WEIGHT
DIAMETER DIAMETER

Sq mm mm mm mm Kg/100 m
16 2.2 1.6 27.6 175
25 2.2 1.6 29.9 215
35 2.2 1.6 32.1 257
50 2.2 2.0 35.6 333
70 2.2 2.0 38.9 414
95 2.2 2.0 42.3 511
120 2.2 2.5 46.6 645
150 2.2 2.5 49.4 743
185 2.2 2.5 52.8 873
240 2.2 2.5 57.8 1083
300 2.4 2.5 63.2 1309
400 2.6 2.5 69.6 1609

CONDUCTORS ARE CIRCULAR STRANDED

28
 C Allied Cables ALLIED CABLES
Allied Cables

1900/3300V - THREE CORE

ALUMINIUM STRANDED CONDUCTOR PVC INSULATED
SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (AL/PVC/SWA/PVC)
TABLE 15

THICKNESS OF
ARMOUR APPROXIMATE APPROXIMATE
NOMINAL AREA
OF CONUCTOR INSULATION WIRE OVERALL CABLE WEIGHT
DIAMETER DIAMETER

Sq mm mm mm mm Kg/100 m
16 2.2 1.6 27.6 134
25 2.2 1.6 29.9 154
35 2.2 1.6 32.1 177
50 2.2 2.0 35.6 228
70 2.2 2.0 38.9 265
95 2.2 2.0 42.3 309
120 2.2 2.5 46.6 390
150 2.2 2.5 49.4 434
185 2.2 2.5 52.8 490
240 2.2 2.5 57.8 586
300 2.4 2.5 63.2 688

CONDUCTORS ARE SHAPED STRANDED

29
 C Allied Cables ALLIED CABLES
Allied Cables

30
 C Allied Cables ALLIED CABLES
Allied Cables

TABLES FOR CURRENT RATINGS:

Page Nos.
A) CABLES INSTALLED IN AIR
- 600/1000 V Single, Twin, Three and Four Core Table 16 33
(CU/PVC/SWA/PVC)
- 600/1000 V Single, Twin, Three and Four Core Table 17 34
(AL/PVC/SWA/PVC)
- 600/1000 V Single, Twin, Three and Four Core Table 18 35
(CU/PVC/PVC)
- 600/1000 V Single, Twin, Three and Four Core Table 19 36
(AL/PVC/PVC)

B) CABLES LAID DIRECT IN GROUND

- 600/1000 V Single, Twin, Three and Four Core Table 20 37

(CU/PVC/SWA/PVC)
- 600/1000 V Single, Twin, Three and Four Core Table 21 38
(AL/PVC/SWA/PVC)
- 600/1000 V Single, Twin, Three and Four Core Table 22 39
(CU/PVC/PVC)
- 600/1000 V Single, Twin, Three and Four Core Table 23 40
(AL/PVC/PVC)

C) CABLES RUN IN SINGLE WAY DUCTS

- 600/1000 V Single, Twin, Three and Four Core Table 24 41

(CU/PVC/SWA/PVC)
- 600/1000 V Single, Twin, Three and Four Core Table 25 42
(AL/PVC/SWA/PVC)
- 600/1000 V Single, Twin, Three and Four Core Table 26 43
(CU/PVC/PVC)

- 600/1000 V Single, Twin, Three and Four Core Table 27 44

(AL/PVC/PVC)

31
 C Allied Cables ALLIED CABLES
Allied Cables

D) CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND/

IN SINGLE WAY DUCT/IN AIR
Page Nos.

- 1900/3300 V Single & Three Core Table 28 45

(CU/PVC/SWA/PVC)

- 1900/3300 V Single & Three Core Table 29 46

(AL/PVC/SWA/PVC)

- 1900/3300 V Single Core Table 30 47

(CU/PVC/PVC)

32
 C Allied Cables ALLIED CABLES
Allied Cables

CURRENT RATINGS FOR CABLES INSTALLED IN AIR

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (Cu/PVC/SWA/PVC)
TABLE 16
TWO CORE THREE AND FOUR CORE
SINGLE CORE*
TWO CABLES SPACED+ THREE CABLES
TREFOIL TOUCHING
NOMINAL
AREA OF CURRENT APPROXI- CURRENT APPROXI- CURRENT APPROXI- CURRENT APPROXI-
CONUCTOR RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT
DROP-PER DROP PER- DROP PER- DROP PER-
AMPERE AMPERRE AMPERRE AMPERRE
PER METRE PER METER PER METER PER METER

mm2 AMPERE mV AMPERE mV AMPERE mV AMPERE mV

1.5** - - - - 21 28 19 25
2.5** - - - - 30 17 25 15
4 - - - - 39 11 33 19.6
6 - - - - 50 7.4 43 6.4
10 - - - - 69 4.4 59 3.8
16 - - - - 90 2.8 77 2.4
25 - - - - 120 1.7 100 1.5
35 - - - - 150 1.3 125 1.1
50 205 0.96 180 0.81 175 0.94 155 0.82
70 255 0.69 230 0.57 220 0.66 190 0.57
95 310 0.54 280 0.43 270 0.49 235 0.42
120 360 0.46 325 0.36 310 0.40 270 0.35
150 405 0.41 370 0.31 355 0.34 310 0.29
185 460 0.36 425 0.26 410 0.29 355 0.25
240 530 0.36 500 0.23 485 0.24 420 0.21
300 600 0.33 570 0.20 550 0.21 475 0.18
400 660 0.30 640 0.19 620 0.19 550 0.17
500 730 0.28 720 0.18 - - - -
630 820 0.26 810 0.16 - - - -
800 880 0.24 870 0.16 - - - -
1000 960 0.22 940 0.15 - - -

* ALUMINIUM ARMOURED
** CIRCULAR SOLID CONDUCTOR
DISTANCE BETWEEN CABLE CENTRES: UPTO & INCLUDING 185 Sq mm SHALL BE TWICE THE
CABLE DIAMETER and 240 Sq mm AND ABOVE - 90 mm

33
 C Allied Cables ALLIED CABLES
Allied Cables

CURRENT RATINGS FOR CABLES INSULATED IN AIR

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (AL/PVC/SWA/PVC)
TABLE 17
NOMINAL SINGLE CORE* TWO CORE THREE AND FOUR CORE
AREA OF
CONUCTOR TWO CABLES SPACED+ THREE CABLES
TREFOIL TOUCHING
CURRENT APPROXI- CURRENT APPROXI- CURRENT APPROXI- CURRENT APPROXI-
RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT
DROP-PER DROP PER- DROP PER- DROP PER-
AMPERE AMPERRE AMPERRE AMPERRE
PER METRE PER METER PER METER PER METER

mm2 AMPERE mV AMPERE mV AMPERE mV AMPERE mV

16 - - - - 68 4.5 58 3.9
25 - - - - 90 2.9 78 2.5
35 - - - - 110 2.1 93 1.8
50 155 1.5 135 1.3 130 1.5 110 1.3
70 190 1.1 170 0.92 165 1.1 145 0.93
95 235 0.81 210 0.68 195 0.79 175 0.68
120 270 0.67 245 0.55 - - 205 0.54
150 305 0.57 280 0.46 - - 235 0.45
185 350 0.49 320 0.38 - - 270 0.37
240 420 0.44 375 0.31 - - 320 0.29
300 475 0.39 430 0.26 - - 370 0.25
380 520 0.35 495 0.24 - - - -
480 590 0.32 560 0.21 - - - -
600 650 0.30 630 0.19 - - - -
740 710 0.28 710 0.18 - - - -
960 800 0.25 790 0.17 - - - -
1200 880 0.23 870 0.16 - - - -

* ALUMINIUM WIRE ARMOURED

* DISTANCE BETWEEN CABLE CENTRES: UPTO & INCLUDING 185 mm2 - SHALL BE TWICE THE CABLE DIAMETER
240 mm2 & ABOVE - 90 MM.
BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:
AMBIENT AIR TEMPERATURE.......................................30 C
MAXIMUM CONDUCTOR OPERATING
TEMPERATURE AT RATED CURRENT............................70 C
METHOD OF INSTALLATION:
Cables shall only be continuously operated at their full rating if the minimum current at which circuit
protection is designed to operate does not exceed 1.5 times the values tabulated.
EFFECT OF GROUPING OF CABLES:
Single core cables installed in the manner indicated in the tabes. Twin and multicore installed in
“defined conditions” in accordance with the IEE Wiring Regulations.
No reduction in rating is necessary providing that:
1. The horizontal clearance between circuit is
(A) Not less than six times the overall diameter of an individual cable
(b) Not less than the overall width of an individual circuit, except that the horizontal
clearance need not in any case exceed 150 mm.

34
 C Allied Cables ALLIED CABLES
Allied Cables

2. The vertical clearance between circuits is not less than 150 mm.
3. If the number of circuits exceeds 4, they are installed in a horizontal plane.

RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES

AMBIENT AIR TEMPERATURE C 25 35 40 45 50
RATING FACTOR 1.08 0.94 0.86 0.77 0.70

For the other conditions of installation, reference should be made to ERA

CURRENT RATINGS FOR CABLES INSTALLED IN AIR

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
PVC SHEATHED CABLES (CU/PVC/PVC)
TABLE 18
NOMINAL SINGLE CORE TWO CORE THREE & FOUR CORE
AREA OF
CONUCTOR TWO CABLES THREE CABLES LAID*
SPACED* TREFOIL TOUCHING FLAT SPACED
CUR- APPRO- CUR- APPRO- CUR- APPRO- CUR- APPRO- CUR- APPRO-
RENT XIMATE RENT XIMATE RENT XIMATE RENT XIMATE RENT XIMATE
RATING VOLT RATING VOLT RATING VOLT RATING VOLT RATING VOLT
DROP DROP DROP DROP DROP
PER PER PER PER PER
AMPERE AMPERE AMPERE AMPERE AMPERE
PER PER PER PER PER
METRE METRE METRE METRE METRE
Sq mm AMPERE mV AMPERE mV AMPERE mV AMPERE mV AMPERE mV

16* - - - - - - 86 2.8 73 2.4

25 - - - - - - 115 1.7 98 1.5
35 - - - - - - 145 1.3 120 1.1
50 190 0.95 170 0.80 185 0.83 170 0.94 150 0.82
70 245 0.68 220 0.57 235 0.60 220 0.66 185 0.57
95 300 0.52 270 0.42 300 0.47 265 0.49 230 0.42
120 355 0.44 310 0.35 345 0.40 305 0.40 265 0.35
150 410 0.39 360 0.29 395 0.35 350 0.34 300 0.29
185 475 0.35 420 0.25 460 0.33 400 0.29 350 0.25
240 590 0.36 495 0.21 590 0.32 475 0.24 415 0.21
300 680 0.33 580 0.19 580 0.31 550 0.21 475 0.18
400 790 0.30 660 0.17 780 0.28 630 0.19 550 0.17
500 900 0.28 760 0.16 890 0.27 - - - -
630 1050 0.26 870 0.15 1030 0.25 - - - -
800 1200 0.24 990 0.15 1170 0.23 - - - -
1000 1330 0.22 1100 0.14 1290 0.22 - - -

* DISTANCE BETWEEN CABLE CENTRES: UPTO AND INCLUDING 185 Sq mm SHALL BE TWICE THE
CABLE DIAMETER 240 Sq mm AND ABOVE - 90 mm.

35
 C Allied Cables ALLIED CABLES
Allied Cables

CURRENT RATINGS FOR CABLES INSTALLED IN AIR

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
PVC SHEATHED CABLES (AL/PVC/PVC) TABLE 19
SINGLE CORE TWO CORE THREE & FOUR CORE
TWO CABLES THREE CABLES LAID*
SPACED* TREFOIL TOUCHING FLAT SPACED
NOMINAL CUR- APPRO- CUR- APPRO- CUR- APPRO- CUR- APPRO- CUR- APPRO-
AREA OF RENT XIMATE RENT XIMATE RENT XIMATE RENT XIMATE RENT XIMATE
CONDUCTOR VOLT VOLT VOLT VOLT VOLT
RATING RATING RATING RATING RATING
DROP DROP DROP DROP DROP
PER PER PER PER PER
AMPERE AMPERE AMPERE AMPERE AMPERE
PER PER PER PER PER
METRE METRE METRE METRE METRE
Sq mm AMPERE mV AMPERE mV AMPERE mV AMPERE mV AMPERE mV
16 - - - - - - 65 4.5 56 3.9
25 - - - - - - 86 2.9 74 2.5
35 - - - - - - 105 2.1 91 1.8
50 145 1.5 125 1.3 140 1.3 125 1.5 110 1.3
70 180 1.1 165 0.9 175 0.95 160 1.1 140 0.93
95 225 0.8 200 0.67 220 0.72 195 0.79 170 0.68
120 260 0.65 235 0.54 255 0.60 - - 200 0.54
150 300 0.55 265 0.45 295 0.51 - - 230 0.45
185 350 0.46 310 0.37 340 0.45 - - 260 0.37
240 440 0.43 370 0.30 440 0.43 - - 310 0.29
300 500 0.38 430 0.25 500 0.39 - - 360 0.25
380 580 0.35 495 0.23 580 0.37 - - - -
480 670 0.32 580 0.20 660 0.30 - - - -
600 760 0.29 650 0.18 750 0.28 - - - -
740 870 0.27 750 0.17 860 0.26 - - - -
960 1020 0.25 880 0.16 1000 0.24 - - - -
1200 1150 0.17 1000 0.15 1130 0.23 - - - -

* DISTANCE BETWEEN CABLE CENTRES: UPTO AND INCLUDING 185 Sq mm SHALL BE TWICE THE
CABLE DIAMETER 240 Sq mm AND ABOVE - 90 mm.
BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:
Ambient air temperature......................................................................30 C
Maximum conductor operating temperature at rated current..............70 C

Cables shall only be continuously operated at their full rating if the minimum current at which circuit
protection is designed to operate does not exceed 1.5 times the values tabulated.
METHOD OF INSTALLATION:
Single core cables installed in the manner indicated in the tables. Twin and multicore cables installed
in “defined conditions” in accordance with the IEE Wiring Regulations.
EFFECT OF GROUPING OF CABLES:
No reduction in rating is necessary provided that:
(1) The horizontal clearance between circuit is

(a) Not less than six times the overall diameter of an individual cable
(b) not less than the overall width of an individual circuit, except that the horizontal
clearance need not in any case exceed 150mm.

36
 C Allied Cables ALLIED CABLES
Allied Cables

(2) The vertical clearance between circuits is not less than 150mm.
(3) If the number of circuits exceeds 4, they are installed in a horizontal plane
RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES:

AMBIENT AIR TEMPERATURE C 25 35 40 45 50

RATING FACTORS 1.08 0.94 0.86 0.77 0.70
For other conditions of installation, reference should be made to ERA report
CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND
600/1000V - SINGLE, TWIN, THREE AND FOUR CORES
STRANDED COPPER CONDUCTOR PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (Cu/PVC/SWA/PVC)
TABLE 20
NOMINAL SINGLE CORE** TWO CORE THREE & FOUR CORE
AREA OF
CONUCTOR TWO CABLES TOUCHING THREE CABLES
TREFOIL TOUCHING

CURRENT APPROXI CURRENT APPROXI CURRENT APPROXI CURRENT APPROXI

RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT
DROP PER DROP PER DROP PER DROP PER
AMPERE AMPERE AMPERE AMPERE
PER METRE PER METRE PER METRE PER METRE
Sq mm2 AMPERE mV AMPERE mV AMPERE mV AMPERE mV

1.5* - - - - 30 28 26 25
2.5* - - - - 40 17 34 15
4 - - - - 53 11 45 9.6
6 - - - - 66 7.4 57 6.4
10 - - - - 88 4.4 75 3.8
16 - - - - 115 2.8 98 2.4
25 - - - - 150 1.7 130 1.5
35 - - - - 185 1.3 155 1.1
50 235 0.93 200 0.81 215 0.94 185 0.82
70 290 0.66 245 0.57 270 0.66 225 0.57
95 345 0.50 295 0.43 320 0.49 270 0.42
120 390 0.41 335 0.36 365 0.40 310 0.35
150 440 0.36 370 0.31 410 0.34 345 0.29
185 490 0.30 415 0.26 465 0.29 390 0.25
240 570 0.26 480 0.23 540 0.24 455 0.21
300 630 0.23 530 0.20 600 0.21 510 0.18
400 700 0.22 590 0.19 670 0.19 570 0.17
500 770 0.20 640 0.18 - - - -
630 850 0.19 710 0.16 - - - -
800 890 0.18 740 0.16 - - - -
1000 940 0.18 780 0.15 - - - -
* CIRCULAR SOLID CONDUCTORS
** ALUMINIUM WIRE ARMOURED

37
 C Allied Cables ALLIED CABLES
Allied Cables

CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (AL/PVC/SWA/PVC) TABLE 21
NOMINAL SINGLE CORE** TWO CORE THREE & FOUR CORE
AREA OF
CONUCTOR TWO CABLES TOUCHING THREE CABLES
TREFOIL TOUCHING

CURRENT APPROXI- CURRENT APPROXI- CURRENT APPROXI- CURRENT APPROXI-

RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT
DROP PER DROP PER DROP PER DROP PER
AMPERE AMPERE AMPERE AMPERE
PER METRE PER METRE PER METRE PER METRE
Sq mm AMPERE mV AMPERE mV AMPERE mV AMPERE mV

16 - - - - 88 4.5 75 3.9
25 - - - - 115 2.9 97 2.5
35 - - - - 140 2.1 115 1.8
50 180 1.5 155 1.3 165 1.5 140 1.3
70 220 1.1 190 0.92 200 1.1 170 0.93
95 265 0.79 225 0.68 235 0.79 205 0.68
120 300 0.64 255 0.55 - - 235 0.54
150 335 0.53 285 0.46 - - 265 0.45
185 380 0.44 325 0.38 - - 300 0.37
240 440 0.36 375 0.31 - - 350 0.29
300 495 0.31 420 0.27 - - 395 0.25
380 550 0.28 465 0.24 - - - -
480 610 0.25 520 0.21 - - - -
600 680 0.23 570 0.20 - - - -
740 730 0.21 620 0.18 - - - -
960 810 0.20 680 0.17 - - - -
1200 880 0.19 730 0.16 - - - -

* ALUMINIUM WIRE ARMOURED

BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:
Ground thernal resistivity.................................1.2 C m/W
Ground Temperature..........................................15 C m/W
Depth of laying....................................................0.5 meter (to the centre of cable or trefoil group of cables)
Maximum operating
conductor temperature
at rated current........................................................70 C
Cables shall only be continuously operated at their full rating if the minimum current at which cir-
cuit protection is designed to operate does not exceed 1.3 times the values tabulated.

METHOD OF INSTALLATION:
Cables installed in the manner indicated in the tables.

EFFECT OF GROUPING OF CABLES:

The current ratings given apply to one, twin or multi core cable, or a single set of single core cables
forming a circuit. When two or more circuits are laid in closed proximity the ratings of the cables
must be reduced by the group rating factors in ERA report.
RATING FACTORS FOR OTHER GROUND TEMPERATURES:
GROUND TEMPERATURE C 20 25 30 35
RATING FACTOR 0.95 0.95 0.85 0.79
For other conditions of installation, reference should be made to ERA report.

38
 C
Allied Cables

CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (CU/PVC/PVC) TABLE 22

NOMINAL SINGLE CORE TWO CORE THREE AND FOUR

AREA OF CORE
CONUCTOR THREE CABLES LAND FLAT
TWO CABLES SPACED*
TOUCHING TREFOIL OR LAID SPACED*
FLAT TOUCHING
CURRENT APPRO CURRENT APPRO CURRENT APPROXI CURRENT APPRO CURRENT APPRO CURRENT APPRO
RATING XIMATE RATING XIMATE RATING MATE VOLT RATING XIMATE RATING XIMATE RATING XIMATE
VOLT VOLT DROP PER VOLT VOLT VOLT
DROP DROP AMPERE DROP DROP DROP
PER PER PER METRE PER PER PER
AMPERE AMPERE AMPERE AMPERE AMPERE
PER PER PER PER PER
METRE METRE METRE METRE METRE

39
TREFOIL FLAT
Sq mm AMPERE mV AMPERE mV AMPERE AMPERE mV AMPERE mV AMPERE MV
mV mV
Allied Cables

16 - - - - - - - - - 115 2.8 98 2.4

25 - - - - - - - - - 150 1.7 130 1.5
35 - - - - - - - - - 185 1.3 155 1.1
50 235 0.93 240 0.95 200 0.80 0.81 210 0.83 215 0.94 185 0.82
70 290 0.65 300 0.68 245 0.57 0.57 260 0.60 270 0.66 225 0.57
95 345 0.49 355 0.52 295 0.42 0.43 310 0.47 320 0.49 270 0.42
120 395 0.40 410 0.44 335 0.35 0.36 355 0.40 365 0.40 310 0.35
150 445 0.34 455 0.39 375 0.29 0.31 395 0.35 410 0.34 345 0.29
185 500 0.29 520 0.35 425 0.25 0.27 450 0.32 465 0.29 390 0.25
240 580 0.24 600 0.31 490 0.21 0.23 520 0.29 540 0.24 455 0.21
300 660 0.22 680 0.29 550 0.19 0.21 590 0.27 610 0.21 510 0.18
400 750 0.20 780 0.27 630 0.17 0.20 680 0.26 690 0.19 580 0.17
500 840 0.19 880 0.26 700 0.16 0.18 760 0.25 - - - -
630 950 0.17 1010 0.25 780 0.15 0.18 870 0.24 - - - -
800 1050 0.17 1140 0.25 860 0.15 0.17 980 0.24 - - - -
1000 1150 0.16 1270 0.24 940 0.14 0.17 1090 0.24 - - -

* ADJACENT CABLE SURFACES SEPARATED BY ONE CABLE DIAMETER.

ALLIED CABLES
 C
Allied Cables

CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (AL/PVC/PVC) TABLE 23
NOMINAL SINGLE CORE TWO CORE THREE AND FOUR
AREA OF CORE
CONUC THREE CABLES LAID FLAT
TOR TWO CABLES SPACED* TREFOIL OR LAID
TOUCHING SPACED*
FLAT TOUCHING

CURRENT APPRO- CURRENT APPRO- CURRENT CURRENT APPRO- CURRENT APPRO- CURRENT APPRO-
XIMATE XIMATE APPROXI XIMATE XIMATE XIMATE
RATING RATING RATING MATE VOLT RATING RATING RATING
VOLT VOLT VOLT VOLT VOLT
DROP DROP DROP PER DROP DROP DROP
PER PER AMPERE PER PER PER
AMPERE AMPERE PER METRE AMPERE AMPERE AMPERE
PER PER PER PER PER
METRE METRE METRE METRE METRE

Sq mm TREFOIL FLAT

40
AMPERE mV AMPERE mV AMPERE AMPERE mV AMPERE mV AMPERE mV
mV mV
Allied Cables

- - - - - - 88 4.5 75 3.9
16 - - - -
- - - - - 115 2.9 97 2.5
25 - - - -
- - - - - 140 2.1 115 1.8
35 - - - 1.3
1.5 150 1.3 1.3 160 165 1.5 140 1.3
50 180 1.5 185 0.93
1.1 185 0.9 0.93 195 200 1.1 170 0.93
70 220 1.1 225 0.70
0.8 225 0.67 0.69 235 245 0.79 205 0.68
95 265 0.77 270 0.57
0.66 255 0.54 0.56 270 - - 235 0.54
120 300 0.62 310 0.49
0.56 285 0.45 0.48 300 - - 265 0.45
150 335 0.51 345 0.41
0.47 325 0.37 0.40 340 - - 300 0.37
185 380 0.42 395 0.34
0.40 375 0.3 0.34 400 - - 350 0.29
240 445 0.34 460 0.31
0.35 425 0.25 0.30 450 - - 395 0.25
300 500 0.29 520 0.28
0.33 480 0.23 0.24 510 - - - -
380 570 0.26 590 0.26
0.30 540 0.2 0.22 580 - - - -
480 640 0.23 670 0.25
0.29 610 0.18 0.20 650 - - - -
600 720 0.21 750 0.24
0.27 680 0.17 0.19 740 - - - -
740 820 0.20 850 0.23
0.26 780 0.16 0.18 850 - - - -
960 940 0.18 980 0.22
0.26 860 0.15 0.17 950 - - - -
1200 1040 0.17 1100

* ADJACENT CABLE SURFACES SEPARATED BY ONE CABLE DIAMETER.

ALLIED CABLES
 C Allied Cables ALLIED CABLES
Allied Cables

CURRENT RATINGS FOR CABLES RUN IN SINGLE WAY DUCTS

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
PVC WIRE ARMOURED PVC SHEATHED CABLES (Cu/PVC/SWA/PVC) TABLE 24

NOMINAL SINGLE CORE TWO CORE THREE AND FOUR CORE

AREA OF
CONDUCTOR TWO CABLES THREE CABLES APPROXI CURRENT APPROXI
CURRENT
RATING MATE VOLT RATING MATE VOLT
DUCTS TOUCHING DUCTS TREFOIL
TOUCING DROP PER DROP PER
AMPERE AMPERE
CURRENT APPROXI CURRENT APPROXI PER PER
RATING MATE VOLT RATING MATE VOLT METRE METRE
DROP PER DROP PER
AMPERE AMPERE
PER PER
METRE METRE
Sq mm AMPERE mV AMPERE mV AMPERE mV AMPERE mV
1.5** - - - - 26 28 22 25
2.5** - - - - 34 17 29 15
4 - - - - 44 11 37 9.6
6 - - - - 55 7.4 47 6.4
10 - - - - 73 4.4 62 3.8
16 - - - - 96 2.8 80 2.4
25 - - - - 125 1.7 105 1.5
35 - - - - 150 1.3 125 1.1
50 215 1.0 200 0.88 180 0.94 150 0.82
70 260 0.76 240 0.66 220 0.66 185 0.57
95 305 0.61 280 0.53 265 0.49 225 0.42
120 340 0.54 310 0.47 300 0.40 255 0.35
150 370 0.48 340 0.42 340 0.34 285 0.29
185 410 0.44 375 0.38 385 0.29 325 0.25
240 460 0.40 415 0.34 445 0.24 375 0.21
300 500 0.37 455 0.32 495 0.21 425 0.18
400 540 0.34 485 0.30 560 0.19 480 0.17
500 580 0.32 520 0.28 - - - -
630 630 0.30 560 0.26 - - - -
800 660 0.28 580 0.25 - - - -
1000 700 0.27 620 0.23 - - - -

* ALUMINIUM WIRE ARMOURED

** CIRCULAR SOLID CONDUCTORS

41
 C Allied Cables ALLIED CABLES
Allied Cables

CURRENT RATINGS FOR CABLES RUN IN SINGLE WAY DUCTS

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (AL/PVC/SWA/PVC)
TABLE 25
NOMINAL SINGLE CORE TWO CORES THREE AND FOUR CORES
AREA OF
CONDUCTOR TWO CABLES THREE CABLES

DUCTS TOUCHING DUCTS TREFOIL

TOUCHING

CURRENT APPROXI CURRENT APPROXI CURRENT APPROXI CURRENT APPROXI

RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT RATING MATE VOLT
DROP PER DROP PER DROP PER DROP PER
AMPERE AMPERE AMPERE AMPERE
PER PER PER PER
METRE METRE METRE METRE
Sq mm AMPERE mV AMPERE mV AMPERE mV AMPERE mV
16 - - - - 73 4.5 61 3.9
25 - - - - 94 2.9 80 2.5
35 - - - - 115 2.1 96 1.8
50 165 1.6 155 1.4 135 1.5 115 1.3
70 200 1.1 185 0.99 165 1.1 140 0.93
95 240 0.87 220 0.75 195 0.79 170 0.68
120 270 0.73 245 0.63 - - 195 0.54
150 295 0.64 270 0.55 - - 220 0.45
185 330 0.56 305 0.48 - - 250 0.37
240 375 0.48 345 0.41 - - 290 0.29
300 415 0.43 375 0.37 - - 330 0.25
380 445 0.39 405 0.34 - - - -
480 490 0.36 440 0.31 - - - -
600 530 0.34 475 0.29 - - - -
740 560 0.32 500 0.28 - - - -
960 610 0.30 550 0.26 - - - -
1200 660 0.28 580 0.24 - - - -

* ALUMINIUM WIRE ARMOURED

BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:
Ground thermal resistivity..................................................1.2 C m/W
Ground temperature...........................................................1.5 C
Depth of laying....................................................................0.5 metre (to the centre of duct or trefoil
group of ducts)
Maximum operating
conductor temperature
at rated current....................................................................70 C
Cables shall only be continuously operated at their full rating if the minimum current at which cir-
cuit protection is designed to operate does not exceed 1.5 times the values tabulated.
METHOD OF INSTALLATION:

The term “duct” applies to a single earthenware, fibre or ferrous pipe except that in the case of
single core cables for use in ac systems, ferrous ducts should not be employed. Ratings are given for
ducts containing one cable each. Cables installed in the manner indicated in the tables.

42
 C Allied Cables ALLIED CABLES
Allied Cables

EFFECT OF GROUPING OF CABLES:

The current ratings given apply to one multicore cable, or a single set of single core cables forming a
circuit, when two or more circuits are laid in close proximity, the ratings of the cables must be reduced
by the group rating factors given in ERA Report
RATING FACTORS FOR OTHER GROUND TEMPERATURES:
GROUND TEMPERATURE C 20 25 30 35
0.95 0.90 0.85 0.79
For other conditions of installation, reference should be made to ERA report

CURRENT RATINGS FOR CABLES RUN IN SINGLE WAY DUCTS

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
PVC SHEATHED CABLES (Cu/PVC/PVC)
TABLE 26
NOMINAL SINGLE CORE TWO CORE THREE AND FOUR CORE
AREA
OF TWO CABLES THREE CABLES
CONDUC-
TOR TREFOIL OR FLAT DUCTS
DUCTS TOUCHING TOUCHING
CURRENT APPROXI CURRENT APPROXIMATE VOLT CURRENT APPROXI CURRENT APPROXI
RATING MATE VOLT RATING DROP PER AMPERE RATING MATE VOLT RATING MATE VOLT
DROP PER PER METRE DROP PER DROP PER
AMPERE AMPERE AMPERE
PER PER PER
METRE METRE METRE

TREFOIL FLAT

Sq mm AMPERE mV AMPERE mV mV AMPERE mV AMPERE mV

16 - - - - - 96 2.8 80 2.4
25 - - - - - 125 1.7 105 1.5
35 - - - - - 150 1.3 125 1.1
50 220 1.0 205 0.88 0.89 180 0.94 150 0.82
70 270 0.76 250 0.66 0.68 220 0.66 185 0.57
95 325 0.61 300 0.53 0.55 265 0.49 225 0.42
120 370 0.54 340 0.47 0.48 300 0.40 255 0.35
150 415 0.48 380 0.42 0.44 340 0.34 285 0.29
185 470 0.44 430 0.38 0.40 385 0.29 325 0.25
240 550 0.40 500 0.34 0.37 445 0.24 375 0.21
300 620 0.37 560 0.32 0.34 510 0.21 425 0.18
400 710 0.34 640 0.30 0.32 580 0.19 485 0.17
500 800 0.32 720 0.28 0.30 - - - -
630 920 0.30 820 0.26 0.29 - - - -
800 1030 0.28 920 0.25 0.27 - - - -
1000 1140 0.27 1010 0.23 0.26 - - - -

43
 C Allied Cables ALLIED CABLES
Allied Cables

CURRENT RATINGS FOR CABLES RUN IN SINGLE WAY DUCTS

600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
PVC SHEATHED CABLES (AL/PVC/PVC) TABLE 27
NOMINAL SINGLE CORE TWO CORE THREE & FOUR CORE
AREA
OF TWO CABLES THREE CABLES
CONDUC- DUCTS TREFOIL
TOR DUCTS TOUCHING CURRENT APPROXI CURRENT APPROXI
TOUCHING RATING MATE RATING MATE
APPROXI VOLT VOLT
CURRENT CURRENT TREFOIL OR FLAT
MATE DROP DROP
RATING RATING APPROXIMATE VOLT
VOLT PER PER
DROP DROP PER AMPERE AMPERE AMPERE
PER PER METRE PER PER
AMPERE METRE METRE
PER
METRE TREFOIL FLAT

Sq mm AMPERE mV AMPERE mV mV AMPERE mV AMPERE mV

16 - - - - - 73 4.5 61 3.9
25 - - - - - 94 2.9 80 2.5
35 - - - - - 115 2.1 96 1.8
50 165 1.6 155 1.4 1.4 135 1.5 115 1.3
70 205 1.1 190 0.99 0.99 165 1.1 140 0.93
95 245 0.87 225 0.75 0.77 200 0.79 170 0.68
120 280 0.73 260 0.63 0.65 - - 195 0.54
150 315 0.64 290 0.55 0.57 - - 220 0.45
185 355 0.56 325 0.48 0.50 - - 250 0.37
240 415 0.48 380 0.41 0.43 - - 290 0.29
300 470 0.43 430 0.37 0.39 - - 330 0.25
380 530 0.39 480 0.34 0.36 - - - -
480 600 0.36 550 0.31 0.34 - - - -
600 680 0.34 610 0.29 0.32 - - - -
740 770 0.32 690 0.28 0.30 - - - -
960 880 0.30 790 0.26 0.28 - - - -
1200 990 0.28 880 0.24 0.27 - - - -

BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:

Ground thermal resistivity..................................................1.2 C m/W
Ground temperature...........................................................1.5 C
Depth of laying....................................................................0.5 metre (to the centre of duct or trefoil
group of ducts)
Maximum operating
conductor temperature
at rated current....................................................................70 C

Cables shall only be continuously operated at their full rating if the minimum current at which circuit
protection is designed to operate does not exceed 1.5 times the values tabulated.
METHOD OF INSTALLATION:
The term “duct” applies to a single earthenware, fibre or ferrous pipe Ratings are given for
ducts containing one cable each. Expect that in the case of single core cables for use in ac systems,
ferrous ducts should not be employed. Cables installed in the manner indicated in the tables.

EFFECT OF GROUPING OF CABLES:

The current ratings given apply to one, twin or multicore cable, or a single set of single core cables
forming a circuit. When two or more circuits are laid in close proximity, the ratings of the cables
must be reduced by the group rating factors given in ERA report

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RATING FACTORS FOR OTHER GROUND TEMPERATURES:

Ground temperature C 20 25 30 35
Rating factor 0.95 0.90 0.85 0.79
The other conditions of installation reference should be made to ERA Report

CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND/IN SINGLE WAY/DUCTS/IN

AIR
1900/3300 - SINGLE & THREE CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES
TABLE 28
NOMINAL DIRECT IN GROUND IN SINGLE WAY DUCTS IN AIR
AREA THREE
OF SINGLE CORE* THREE SINGLE CORE* THREE SINGLE CORE*
CORE CORE CORE
CONDUCTOR
THREE THREE THREE
CABLES CABLES CABLES
TREFOIL DUCTS TREFOIL
TOUCHING TOUCHING TOUCHING
INTREFOIL
Sq mm AMPERE AMPERE AMPERE AMPERE AMPERE AMPERE

16 - 94 - 80 - 79
25 - 120 - 105 - 100
35 - 145 - 125 - 125
50 190 175 190 145 180 155
70 235 215 225 180 230 190
95 280 260 265 220 285 235
120 315 295 295 250 325 275
150 350 330 320 280 370 310
185 395 375 355 315 425 355
240 455 430 395 365 500 420
300 510 480 430 405 570 475
400 560 540 455 465 640 550
500 610 - 490 - 720 -
630 660 - 530 - 810 -
800 690 - 550 - 870 -
1000 730 - 580 - 940 -

* ALUMINIUM WIRE ARMOURED.

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CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND/IN SINGLE WAY/DUCTS/IN

AIR
1900/3300V - *SINGLE & THREE CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (AL/PVC/Armoured/PVC)
TABLE 29
NOMINAL DIRECT IN GROUND IN SINGLE WAY DUCTS IN AIR
AREA
OF SINGLE CORE* SINGLE CORE* SINGLE CORE*
CONDUCTOR
THREE THREE THREE THREE THREE THREE
CABLES CORE CABLES CORE CABLES CORE
TREFOIL TREFOIL TREFOIL
TOUCHING TOUCHING TOUCHING
IN TREFOIL IN TREFOIL
Sq mm AMPERE AMPERE AMPERE AMPERE AMPERE AMPERE
16 - 72 - 61 - 60
25 - 93 - 78 - 78
35 - 110 - 94 - 93
50 145 135 145 110 140 115
70 180 165 175 140 170 145
95 215 195 210 165 215 175
120 245 225 235 190 245 205
150 270 255 255 215 280 235
185 305 290 290 245 320 270
240 355 335 325 285 375 320
300 400 380 360 320 430 365
380 440 - 385 - 495 -
480 490 - 420 - 560 -
600 540 - 450 - 630 -
740 580 - 470 - 710 -
960 640 - 510 - 790 -
1200 690 - 550 - 870 -
* ALUMINIUM WIRE ARMOURED
BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:
Ambient air temperature.............................................30 C
Ground Thermal resistivity..........................................1.2 C m/W
Ground temperature....................................................15 C
Depth of laying.............................................................0.8 metre ( to the centre of cable or duct, or trefoil
group of cables or ducts)
Maximum operating
conductor temperature
at rated current...................................................70 C

Cables shall only be continuously operated at their full rating if the minimum current at which circuit
protection is designed to operate does not exceed 1.5 times the values tabulated.
METHOD OF INSTALLATION:
The Term “duct” applies to a single earthenware, fibre or ferrous pipe. Ratings are given for ducts
containing one cale each, except that in the case of single core cables for use in ac systems, ferrous
ducts should not be employed. Cables installed in the manner indicated in the tables.
EFFECT OF GROUPING OF CABLES:
The current ratings given apply to one, twin or multicore cable, or a single set of single core cables
forming a circuit. When two or more circuits are laid in close proximity, the ratings of the cables
must be reduced by the group rating factors given in ERA report

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(A) The horizontal balance between circuits is

(I) Not less than 6 times the overall diameter of an individual cable.
(ii) Not that than the overall width of an individual circuit, except that the horizontal clearance
need not in any case exceed 150mm.
(B) The vertical clearance between circuits is not less than 150mm.
(C) if the number of circuits exceeds 4, they are installed in a horizontal plane.
Cables laid direct: The ratings of the cables should be reduced by the group rating factors given in
ERA Report
Cable in ducts: The ratings of the cables should be reduced by the group rating factors given in
ERA Report

RATING FACTORS FOR OTHER AMBIENT TEMPERATURES:

Ambient air temperature C 25 35 40 45 50
Rating factor 1.08 0.94 0.86 0.77 0.70
RATING FACTORS FOR OTHER GROUND TEMPERATURES:

Ground temperature C 20 25 30 35
Rating factor 0.95 0.90 0.85 0.79

For other conditions of installation, reference should be made to ERA Report

CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND/IN SINGLE WAY DUCTS/IN
AIR
1900/3300v - SINGLE CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
PVC SHEATHED CABLES (Cu/PVC/PVC)
TABLE 30
NOMINAL DIRECT IN GROUND IN SINGLE WAY
AREA IN AIR
DUCTS
OF
CONDUCTOR THREE SINGLE CORE CABLES THREE SINGLE THREE SINGLE CORE CABLES
CORE CABLES

TREFOIL OR LAID FLAT TREFOIL OR TREFOIL LAID FLAT

LAID FLAT SPACED* LAID FLAT TOUCHING SPACED*
TOUCHING DUCTS
TOUCHING
Sq mm AMPERE AMPERE AMPERE AMPERE AMPERE
50 190 200 190 170 190
70 235 245 235 220 235
95 280 295 285 270 300
120 320 335 320 315 350
150 355 375 360 365 395
185 405 425 410 420 460
240 465 495 475 495 590
300 520 560 530 580 680
400 590 640 610 660 780
500 660 720 680 760 890
630 740 820 780 870 1030
800 810 920 870 990 1170
1000 880 1020 950 1100 1290

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BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:

AMBIENT AIR TEMPERATURE...........................................30 C
GROUND THERMAL RESISTIVITY.....................................1.2 C m/W
GROUND TEMPERATURE..................................................15 C
DEPTH OF LAYING..............................................................0.8 metre ( to the centre of cable or duct, or trefoil
group of cables or ducts)

MAXIMUM OPERATING
CONDUCTOR TEMPERATURE
AT RATED CURRENT................................................................70 C
Cables shall only be operated at their full rating if the minimum current at which circuit protection
is designed to operate does not exceed 1.5 times (in the case of cables in air or in ducts) or 1.3 times
(in the case of cables laid direct in the ground) the values tabulated.
METHOD OF INSTALLATION:
Cable installed in the manner indicated in the tables when groups of circuits are installed in close
proximity. Consideration should be given to the following.
Cable in air: No reduction in rating is necessary providing that
(A) The horizontal balance between circuits is
(I) Not less than 6 times the overall diameter of an individual cable.
(ii) Not lees than the overall width of an individual circuit, except that the horizontal clearance
need not in any case exceed 150mm.
(B) The vertical clearance between circuits is not less than 150mm.
(C) if the number of circuits exceeds 4, they are installed in a horizontal plane.

Cables laid direct: The ratings of the cables should be reduced by the group rating factors given in
ERA Report.
Cable in ducts: The ratings of the cables should be reduced by the group rating factors given in
ERA Report.
RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES:
Ambient air temperature C 25 35 40 45 50
Rating factors 1.08 0.94 0.86 0.77 0.70
RATING FACTORS FOR OTHER GROUND TEMPERATURES:
Ground temperatures C 20 25 30 35
Rating factors 0.95 0.90 0.85 0.79
For other conditions of installation, reference should be made to ERA Report.

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RATING FACTORS FOR CABLES INSTALLED IN AIR

Mostly “in air” installations are in buildings, hence the ratings correspond to ambient air temperature
of 30 C Conversion to any other ambient temperature is achieved by the use of taking factors
given with the current rating tables.
Ratings for cables run in free air are on basis that they are shielded from the direct rays of the sun
without restriction of ventilation.
DEFINED CONDITIONS OF INSTALLATION:
Defined conditions of installation are given below. These are extracted from
IEE Regulations for the Electrical Equipment of Buildings.
(a) Single Core Cable:
(1) Two or three single core cable are installed one above the other, fixed to the vertical sur-
face of a wall or open cable trench as follows, the distance between the wall and the sur-
face of the cable being at least 20mm in each instance. Cables in which the conductor
cross sectional area does not exceed 185 mm2 are installed at a distance between centre
of twice the overall diameter of the cable.
Cables in which the conductor cross-selectional area exceeds 185 mm2 are installed at a
distance between centres of 90 mm. The ratings for two cables may be applied with safety in
instances where such cables are installed in horizontal formation on brackets fixed to a
wall, either spaced as indicated above, or touching through out.
(2) Three single core cables are installed in trefoil formation, fixed to the vertical surface of a
wall or open cable trench, the cables touching through out and the distance between the
wall and the surface of the nearest cable being atleast 20mm, or, alternatively, three single
core cables are installed in trefoil formation and laid on a non-metallic floor the cables
touching each other and the floor throughout. The cables are assumed to be remote from
iron, steel or ferro-concrete, other than the cable supports.
(b) Multicore Cables:
Cables of all types other than single core cables are installed singly, fixed to the vertical surface
of a wall or open cable trench, the distance between the surface of the cable and the wall being
at least 20mm in every instance.
The ratings given in Tables 16, 17, 18, 19, 28, 29, 30 & 31 for multicore cables are for cables
installed under defined conditions.
If it is necessary for cables to be installed at distances less than those described above, then the
values tabulated under the heading “Clipped direct to a surface” in the IEE Wiring Regulations
should be employed.
RATING FACTORS FOR CABLES LAID DIRECT IN GROUND:
Ratings for cables installed direct in the ground are based on values of soil temperature and soii
thermal resistivity, which are generally representative of conditions in Pakistan. Rating factors to
take account of variation in ground temperature are given with the current rating tables. Where
conditions of operation can be fairly accurately estimated, and knowledge of soil along the route is
available, it is possible to determine the ratings more precisely by the use of the soil thermal resistivity
factors, group factors, and factors for the depths of laying given in Table 31, 32, 33 and 34,
These factors are tabulated in more detail in ERA Report

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TABLES FOR CABLE LAID DIRECT IN GROUND

Page No.

Rating factor for variation in Thermal Resistivity of Soil. Table 31 55

Rating factor for depth of laying of centre of cable or trefoil

groups of cables. Table 32 55

Group rating of three single core cables. Table 33 56

Group rating of multicore cables. Table 34 56

Average value of rating factors for variation in thermal resistivity. Table 35 57

Rating factors for Depth of laying of centre of Duct or Trefoil

groups of ducts. Table 36 57

Group rating for single core cables in trefoil single way ducts. Table 37 57

Group rating factors for multicore cables in single way ducts. Table 38 58

Resistance of conductor and armoured single core cables

with Aluminium wire armoured. Table 39 58

Multicore cables with steel wire armoured. 59

Table 40

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RATING FACTOR FOR VARIATION IN THERMAL

RESISTIVITY OF SOIL (AVERAGE VALUES)
TABEL 31
CABLE SIZE SOIL THERMAL RESISTIVITY IN C m/W
Sq mm 0.8 0.9 1.0 1.5 2.0 2.5
SINGLE CORE CABLE UPTO 150 1.16 1.12 1.07 0.91 0.81 0.73
FROM 185 TO 300 1.17 1.12 1.07 0.91 0.80 0.73
FROM 380 TO 1200 1.17 1.12 1.07 0.91 0.80 0.72
MULTICORE CABLES UPTO 16 1.10 1.07 1.05 0.93 0.85 0.79
FROM 25 TO 150 1.14 1.09 1.06 0.92 0.83 0.76
FROM 185 TO 400 1.15 1.10 1.07 0.92 0.81 0.74

Types of load are classified under three headings in ERA Report

TYPE A Cables carrying a constant load throughout the year.
TYPE B Cables carrying varying loads, maximum in summer.
TYPE C Cables carrying varying loads, maximum in winter.
With the type of load on the cable, it is possible to determine the soil thermal resistivity along the
cable route in accordance with recommendations in ERA Report.

RATING FACTORS FOR DEPTH OF LAYING (TO CENTRE OF CABLE OR TREFOIL GROUP
OF CABLES

TABLE 32
DEPTH OF 600/1000V CABLES
LAYING 1900/3300V CABLES

UPTO 70 Sq mm TO ABOVE UPTO ABOVE

METRES 50 Sq mm 300 Sq mm 300 Sq mm 300 Sq mm 300 Sq mm
0.50 1.00 1.00 1.00 - -
0.60 0.99 0.98 0.97 - -
0.80 0.97 0.96 0.94 1.0 1.00
1.00 0.95 0.93 0.92 0.98 0.97
1.25 0.94 0.92 0.89 0.96 0.95
1.50 0.93 0.90 0.87 0.95 0.93
1.75 0.92 0.89 0.86 0.94 0.91
2.00 0.91 0.88 0.85 0.92 0.89
2.50 0.90 0.87 0.84 0.91 0.88
3.00 0.89 0.85 0.82 0.90 0.86

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GROUP RATING FACTORS FOR CIRCUIT OF THREE SINGLE CORE CABLES,

IN TREFOIL OR LAID IN FLAT TOUCHING, HORIZONTAL FORMATION TABLE 33

NUMBER SPACING OF CIRCUITS - METRE

OF
CIRCUITS TOUCHING 0.15 0.30 0.45 0.60
TREFOIL LAID FLAT
600/100V 2 0.78 0.81 0.83 0.88 0.91 0.93
3 0.66 0.70 0.73 0.79 0.84 0.87
4 0.61 0.64 0.68 0.73 0.81 0.85
5 0.56 0.60 0.64 0.73 0.79 0.85
6 0.53 0.57 0.61 0.71 0.78 0.82
1900/3300V 2 0.78 0.80 0.82 0.86 0.89 0.91
3 0.66 0.68 0.71 0.77 0.80 0.83
4 0.59 0.62 0.65 0.72 0.77 0.80
5 0.55 0.58 0.61 0.68 0.74 0.78
6 0.52 0.55 0.58 0.66 0.72 0.76
* This configuration, at 0.15 metre spacing, may not be practical for larger diameter cables.

GROUP RATING FACTORS FOR MULTICORE CABLES IN HORIZONTAL FORMATION

TABLE 34

SPACING - METRE SPACING

NUMBER OF SPACING IN METRES

CABLES IN
GROUP TOUCHING 0.15 0.30 0.45 0.60
600/1000V 2 0.81 0.87 0.91 0.93 0.95
3 0.70 0.78 0.84 0.88 0.90
4 0.63 0.74 0.81 0.86 0.89
5 0.59 0.70 0.78 0.84 0.87
6 0.55 0.68 0.77 0.83 0.87
1900/3300V 2 0.80 0.85 0.89 0.91 0.93
3 0.68 0.76 0.81 0.84 0.87
4 0.62 0.71 0.77 0.81 0.84
5 0.57 0.66 0.73 0.78 0.82
6 0.54 0.64 0.71 0.77 0.81
The term ducts applies to single way earthenware, fibre or ferrous pipes. Recommended inside and
outside diameter of duct is 100mm and 130mm respectively for cables having overall diameter of
upto 65mm. Similarly for cables having overall diameter above 65mm and upto 90mm the inside
and outside duct diameter is 125mm and 160mm respectively.
Ratings for cables installed in single way ducts, underground, are based on values of soil temperature
and soil thermal resistivity which are generally representative of conditions in Pakistan. Rating
factors to take account of variation in ground temperature are given with the current rating tables
where conditions of operation can be fairly accurately estimated, and knowledge of the soil along
the route is available. it is possible to determine the ratings more precisely by the use of the soil
thermal resistivity factors, grouping factors and factors for the depth of laying given in tables 36 to
39. These factors are tabulated in more detail in ERA Report

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AVERAGE VALUES OF RATING FACTORS FOR VARIATION IN THERMAL RESISTIVITY

OF SOIL
TABLE 35
CABLE SIZE SOIL THERMAL RESISTIVITY IN C m/W
Sq mm 0.8 0.9 1.0 1.5 2.0 2.5

SINGLE CORE CABLES UPTO 150 1.09 1.06 1.04 0.94 0.87 0.81
FROM 185 TO 300 1.11 1.07 1.04 0.94 0.86 0.79
FROM 500 TO 1200 1.12 1.08 1.05 0.93 0.84 0.78
MULTICORE CABLES UPTO 16 1.04 1.03 1.02 0.97 0.93 0.90
FROM 85 TO 150 1.05 1.04 1.02 0.96 0.91 0.86
FROM 185 TO 400 1.07 1.05 1.03 0.95 0.89 0.83

Types of load are classified under three headings in ERA report

TYPE A Cables carrying a constant load throughout the year...
TYPE B Cables carrying varying load, maximum in summer.
TYPE C Cable carrying varying load, maximum in winter.
With the type of load on the cable, it is possible to determine the soil thermal resistivity along the
cable route in accordance with recommendations in ERA Report
RATING FACTORS FOR DEPTH OF LAYING TO THE CENTRE OF DUCT OR TREFOIL
GROUP OF DUCTS
TABLE 36
DEPTH OF LAYING 600/1000V CABLES 1900/3300V CABLES
METRE SINGLE CORE MULTI CORE SINGLE CORE MULTI CORE
0.50 1.00 1.00 - -
0.60 0.98 0.99 - -
0.80 0.95 0.98 1.00 1.00
1.00 0.93 0.96 0.98 0.99
1.25 0.91 0.95 0.95 0.97
1.50 0.89 0.94 0.94 0.96
1.75 0.88 0.94 0.92 0.96
2.0 0.87 0.93 0.91 0.95
2.5 0.86 0.92 0.89 0.94
3.0 0.85 0.91 0.88 0.93
OR MORE

GROUP RATING FACTORS FOR SINGLE CORE CABLES IN TREFOIL SINGLE WAY DUCTS,
HORIZONTAL FORMATION
TABLE 37

SPACING - METRE

NUMBER SPACING IN METRES

OF
CIRCUITS TOUCHING 0.45 0.60

600/1000V 2 0.87 0.91 0.93

3 0.78 0.84 0.87
4 0.74 0.81 0.85
5 0.70 0.79 0.83
6 0.69 0.78 0.82
1900/3300V 2 0.85 0.88 0.90
3 0.75 0.80 0.83
4 0.70 0.77 0.80
5 0.67 0.74 0.78
6 0.64 0.72 0.76

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GROUP RATING FACTORS FOR SINGLE CORE CABLES IN TREFOIL SINGLE WAY DUCTS,
HORIZONTAL FORMATION
TABLE 38

SPACING
SPACING - METRE

NUMBER OF SPACING IN METRES

DUCTS IN
GROUP TOUCHING 0.30 0.45 0.60
600/1000V 2 0.90 0.93 0.95 0.96
3 0.83 0.88 0.91 0.93
4 0.79 0.85 0.89 0.92
5 0.75 0.83 0.88 0.91
6 0.73 0.82 0.87 0.90
1900/3300V 2 0.88 0.91 0.93 0.94
3 0.80 0.85 0.88 0.90
4 0.76 0.81 0.85 0.88
5 0.72 0.78 0.83 0.86
6 0.69 0.76 0.81 0.85

RESISTANCE OF CONDUCTOR AND ARMOUR

SINGLE CORE CABLES WITH ALUMINIUM WIRE ARMOUR
TABLE 39
NOMINAL MAXIMUM RESISTANCE PER 1000 METRES OF CABLES AT 20 C (OHM)
ARE
OF ALUMINIUM COPPER ALUMINIUM WIRE ARMOUR
CONDUCTORS CONDUCTOR CONDUCTOR CABLES WITH CABLES WITH
STRANDED STRANDED
ALUMINIUM COPPER
CONDUCTORS CONDUCTORS
Sq mm 600/1000V 1900/3300V 600/1000V 1900/3300V

50 0.628 0.379 0.91 0.80 0.82 0.74

70 0.435 0.262 0.80 0.72 0.74 0.66
95 0.313 0.189 0.72 0.49 0.64 0.45
120 0.248 0.150 0.49 0.47 0.45 0.41
150 0.202 0.122 0.45 0.43 0.41 0.39
185 0.161 0.097 0.41 0.41 0.37 0.37
240 0.122 0.074 0.37 0.37 0.33 0.33
300 0.098 0.059 0.35 0.35 0.31 0.31
400 0.076 0.046 - - 0.23 0.23
500 0.061 0.037 - - 0.19 0.19
630 0.47 0.028 - - 0.17 0.17
800 0.037 0.022 - - 0.13 0.13
1000 0.029 0.018 - - 0.11 0.11

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MULTICORE CABLES WITH STEEL WIRE ARMOUR
TABLE 40
NOMINAL MAXIMUM RESISTANCE PER 1000 METRES OF CABLE AT 20 C (OHM)
AREA
OF COPPER ALUMI- STEEL WIRE ARMOURED
CONDUC- CONDUC- MINIUM
TOR TOR CONDUC- CABLES WITH STRANDED CABLES WITH STRANDED COPPER CONDUCTORS
TOR ALUMINIUM CONDUCTORS
TWO THREE CORE FOUR TWO THREE CORE FOUR FOUR
CORE CORE CORE CORE CORE WITH
RE-
DUCED
NEU-
TRAL
Sq mm 600/ 600/ 1900/ 600/ 600/ 600/ 1900/ 600/ 600/1000v
1000v 1000v 3300v 1000v 1000v 1000v 3300v 1000v
1.5* 12.1 - - - - - 10.7 10.2 - 9.5 -
2.5* 7.41 - - - - - 9.1 8.8 - 7.9 -
4 4.61 - - - - - 7.5 7.0 - 4.6 -

6 3.08 - - - - - 6.8 4.6 - 4.1 -

59
10 1.83 - - - - - 3.9 3.7 - 3.4 -
16 1.15 1.89 4.6 3.9 2.2 2.7 4.5 3.8 2.1 2.6 -
Allied Cables

1.9
25 0.727 1.20 3.0 2.5 2.0 2.3 2.6 2.4 1.8 2.1 2.1
35 0.524 0.868 2.7 2.3 1.9 2.0 2.4 2.1 1.3 1.9 1.9
50 0.387 0.641 2.6 2.0 1.4 1.4 2.1 1.9 1.3 1.3

70 0.268 0.443 2.1 1.5 1.3 1.3 1.9 1.3 1.2 1.2 1.2
95 0.193 0.320 1.5 1.3 1.2 1.1 1.3 1.2 1.1 0.98 1.0
120 0.153 0.253 - 1.2 0.89 0.78 1.2 1.1 0.76 0.71 0.72

150 0.124 0.206 - 0.82 0.78 0.71 1.1 0.74 0.71 0.65 0.66
185 0.991 0.164 - 0.74 0.72 0.64 0.78 0.68 0.66 0.59 0.60
240 0.075 0.125 - 0.65 0.65 0.57 0.69 0.60 0.60 0.52 0.54

300 0.060 0.100 - 0.59 0.59 0.52 0.63 0.54 0.54 0.47 0.48
(150 Sq
mm)

300 0.060 0.100 - - - - - - - - 0.47

(185 Sq
mm)

400 0.047 - - - - 0.56 0.49 0.49 0.34 0.35

* SOILD CIRCULAR CONDUCTORS

ALLIED CABLES
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SHORT CIRCUIT RATINGS

- Stranded Copper Conductor 62

- Stranded Aluminium Conductor 63

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SHORT CIRCUIT RATINGS-STRANDED ALUMINIUM CONDUCTORS :

100
90
80
70
60

50

40
1000 mm2
30
800 mm2

630 mm2
20
CURRENT IN KILO-AMPERES

500 mm2

400 mm2
300 mm2
10
240 mm2
9
8
185 mm2
7
6
150 mm2
5
120 mm2

4
95 mm2

3
70 mm2

2
50 mm2

35 mm2

16 mm2 25 mm2
1
0.1 0.2 0.3 0.4 0.6 0.8 1.0 2.0 3.0
0.5 0.7 0.9

DURATION OF SHORT CIRCUIT IN SECONDS

BASIS: Cable fully loaded at start of short circuit. Conductor temperature at end of short circuit: 130 C

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SHORT CIRCUIT RATINGS-STRANDED COPPER CONDUCTOR

100
90
80
70
60
1000 mm2
50
800 mm2
40

630 mm2
30
500 mm2

400 mm2
20
CURRENT IN KILO-AMPERES

300 mm2
240 mm2

185 mm2
10
9 150 mm2
8
7 120 mm2

6
95 mm2
5
70 mm2
4

3
50 mm2

35 mm2
2

25 mm2

1 10 mm2 16 mm2
0.1 0.2 0.3 0.4 0.6 0.8 1.0 2.0 3.0
0.5 0.7 0.9

DURATION OF SHORT CIRCUIT IN SECONDS

BASIS: Cable fully loaded at start of short circuit. Conductor temperature at end of short circuit: 130 C

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FLAT CABLE

PVC FLAT CABLE 300/500 V AND 600/1000 V

DIMENSIONS AND WEIGHTS

Page Nos.

Table 1 300/500 or 450/750 V Single Core

(CU/PVC or CU/PVC/PVC) 68

Table 2 600/1000 V Two Core Flat

(CU/PVC/PVC) 69

Table 3 600/1000 V Three Core Flat

(CU/PVC/PVC) 70

Table 4 300/500 V Twin Flat Cables

(CU/PVC/PVC) 71
With CPC

Table 5 300/500 V Twin Flat Cable

(CU/PVC/PVC) 71
Without CPC

CPC means Circuit Protective Conductor

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C
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300/500 or 450/750 V - SINGLE CORE

COPPER CONDUCTOR PVC INSULATED
UNSHEATHED OR PVC SHEATHED CABLES
(Cu/PVC or Cu/PVC/PVC) B.S. 6004
TABLE 1
Nominal Maximum Thickness Cu/PVC Cu/PVC/PVC
Area of Conductor of
Conductor Resistance Insulation Approx. Approx. Thickness Approx. Approx.
at 20 C Overall Cable of Sheath Overall Cable
Diameter Weight Diameter Weight
Sqmm Ohm/Km mm mm Kg/Km mm mm Kg/Km
1.0* 18.1 0.6 2.8 14 0.8 4.5 28
1.5* 12.1 0.7 3.3 20 0.8 4.9 35
1.5 12.1 0.7 3.5 22 0.8 5.2 38
2.5* 7.41 0.8 3.9 28 0.8 5.8 50
2.5 7.41 0.8 4.2 32 0.8 6.0 53
4 4.61 0.8 4.8 45 0.9 6.8 72
6 3.08 0..8 5.4 70 0.9 7.4 95
10 1.83 1.0 6.8 105 0.9 8.8 150
16 1.15 1.0 8.0 175 1.0 10.5 215
25 0.727 1.2 9.8 275 1.1 12.5 330
35 0.524 1.2 11.0 370 1.1 13.5 430
50 0.387 1.4 13.0 490 - - -
70 0.268 1.4 15.0 690 - - -
95 0.193 1.6 17.0 960 - - -
120 0.153 1.6 19.0 1170 - - -
150 0.124 1.8 21.0 1460 - - -
185 0.0991 2.0 23.5 1850 - - -
240 0.0754 2.2 26.5 2400 - - -
300 0.0601 2.4 29.5 3000 - - -
400 0.0470 2.6 33.5 3910 - - -
500 0.0366 2.8 37.0 4920 - - -
630 0.0283 2.8 41.0 6100 - - -

* Solid wire

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1 600/1000V PVC Insulated Flat Cable (Two core)

2 Construction

Copper Conductor
PVC Insulation
PVC Sheath

3 Core identification (red and black)

TABLE 2

Conductor Nominal Nominal Overall Weight Max Test Min

thickness thickness dimension conductor voltage insulation
Nominal Construction of of resistance for 5 min resistance
cross-sectional insulation sheath (at 20 C) (at 20 C)
area (approx.) (approx.)
mm2 No./mm mm mm mm x mm Kg/Km /km kV M /km
1.0 1/1.13 0.6 0.9 4.4 x 6.9 51 17.7 1.5 12
1.5 1/1.38 0.6 0.9 4.6 x 7.2 63 11.9 1.5 11
2.5 1/1.78 0.7 1.0 5.4 x 8.7 95 7.14 1.5 9
4. 7/0.85 0.8 1.0 6.4 x 10.6 145 4.52 1.5 8
6. 7/1.04 0.8 1.1 7.1 x 11.9 200 3.02 1.5 7

10 7/1.35 1.0 1.2 8.7 x 14.8 315 1.79 3 7

16 7/1.70 1.0 1.3 9.9 x 17.1 455 1.13 3 6

B.S. 6004

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1 600/1000V PVC Insulated Flat Cable (Three core)

2 Construction

Copper Conductor
PVC Insulation
PVC Sheath

3 Core identification (red yellow and blue)

TABLE 3

Conductor Nominal Nominal Overall Weight Max Test Min

thickness thickness dimension conductor voltage insulation
Nominal Construction of of resistance for 5 min resistance
cross-sectional insulation sheath (at 20 C) (at 20 C)
area (approx.) (approx.)
No./mm mm mm mm x mm Kg/Km /km kV
1.0 1/1.13 0.6 0.9 4.3 x 9.1 73 17.7 1.5 12
1.5 1/1.38 0.6 0.9 4.5 x 9.8 91 11.9 1.5 11
2.5 1/1.78 0.7 1.0 5.4 x 11.9 140 7.14 1.5 9
4. 7/0.85 0.8 1.1 6.5 x 15.0 220 4.52 1.5 8
6. 7/1.04 0.8 1.1 7.1 x 16.7 230 3.02 1.5 7
10 7/1.35 1.0 1.2 8.7 x 21.0 470 1.79 3 7
16 7/1.70 1.0 1.3 9.9 x 24.3 675 1.13 3 6

On order, we also manufacture, the flat sizes in flexible conductors.

B.S. 6004
B.S. 6500

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300/500 V. TWIN FLAT CABLES

COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES WITH
CIRCUIT PROTECTIVE CONDUCTOR
(Cu/PVC/PVC)

WITH CIRCUIT PROTECTIVE CONDUCTOR (PREVIOUSLY ECC) TABLE 4

Nominal Area of Max Resistance at 20 C Thickness Thickness
of Dimension
Conductor Circuit Conductor Circuit Thickness outer of
Protective Protective of sheath cable
Conductor Conductor Insulation (Max.)
Sqmm Ohm/Km mm mm mm

1.0* 1.0 18.1 18.1 0.6 0.9 4.7 x 8.6

1.5* 1.0 12.1 18.1 0.7 0.9 5.4 x 9.6
1.5 1.0 12.1 18.1 0.7 0.9 5.5 x 10.0

2.5* 1.5 7.41 18.1 0.8 1.0 6.2 x 11.5

2.5 1.5 7.41 18.1 0.8 1.0 6.3 x 12.1

4.0 1.5 4.61 12.1 0.8 1.0 7.2 x 13.0

6.0 2.5 3.08 7.41 0.8 1.1 8.0 x 15.0

WITHOUT CIRCUIT PROTECTIVE CONDUCTOR TABLE 5

Nominal Area Max. Conductor Thickness Thickness Overall
of Resistance at of of Dimension
Conductor 20 C Insulation Outer Sheath of Cable (Max)
Sqmm Ohm/Km mm mm mm

1.0* 18.1 0.6 0.9 4.7 x 7.4

1.5* 12.1 0.7 0.9 5.4 x 8.4
1.5 12.1 0.7 0.9 5.5 x 8.8

2.5* 7.41 0.8 1.0 6.2 x 9.8

2.5 7.41 0.8 1.0 6.3 x 10.5

4.0 4.61 0.8 1.0 7.2 x 11.5

6.0 3.08 0.8 1.1 8.0 x 13.0

B.S. 6004

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SECTION-2 Page No.

CONDUCTOR FOR OVERHEAD LINES 75-76

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CONDUCTORS FOR OVERHEAD LINES

HARD DRAWN COPPER CONDUCTOR
(HDBC)

Nominal Number of Nominal Dia. Approx. Max. Conductor Standard Maximum Breaking
Area Wires in Of Wires Conductor Resistance Weight Weight Load
Conductor in Conductor Diameter at 20 C Min.
Sqmm No mm mm Ohm/Km Kg/Km Kg/Km N
10 7 1.35 4.05 1.823 89.78 91.88 4129
14 7 1.60 4.80 1.298 126.10 128.90 5744
16 3 2.65 5.69 1.104 148.30 152.00 6590
25 7 2.14 6.42 0.7255 225.70 230.70 10170
32 3 3.75 8.05 0.5514 296.90 304.30 12710
35 7 2.50 7.50 0.5319 308.00 314.90 14097
50 7 3.00 9.00 0.3694 443.50 453.40 19497
70 7 3.55 10.65 0.2637 621.00 634.70 26880
100 7 4.30 12.90 0.1804 911.20 934.30 37640
125 19 2.90 14.50 0.1463 1130.00 1158.00 48340
150 19 3.10 16.00 0.1201 1376.00 1410.00 58690
185 18 3.55 17.75 0.09759 1693.00 1735.00 71380

Conductor conforms to BS 125

ALL ALUMINIUM CONDUCTORS (AAC)

Stranding Dia of Calculated D. C.

CODE Nominal area of Ultimate Weight
Size and wire complete complete strength Resistance
WORD diameter conductor at 20
conductor

Sqmm No./mm mm Sq mm Kg. ohms/km kg/km

Gnat 25 7/2.21 6.63 26.85 469 1.0661 73.4

Ant 50 7/3.10 9.30 52.83 847 0.5419 144.4

Wasp 100 7/4.39 13.17 105.95 1633 0.2702 290.1

Arbutus 400 37/3.72 26.06 402.15 6304 0.0717 1108.7

Hawthorn 500 61/3.55 31.95 603.78 8966 0.0479 1668.1

Conductor conforms to BS 215 (Part 1) - 1970.

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STEEL CORED ALUMINIUM CONDUCTORS (ACSR)

Diameter Area of Rated
Cores D. C.
Allumi- area com- Ulti- Resis-
Code nium Steel Com- lete mate
plete Steel of tance Weight
Word conduc- Core alumi- conduc stren at 20 C
tor con- Core tor gth
ductor nium
No / mm No / mm mm mm mm2 mm2 Kg ohm/km Kg/km

Gopher 6/2.36 1/2.36 7.08 2.36 26.25 30.62 980 1.093 106
Rabbit 6/3.35 1/3.35 10.05 3.35 52.88 61.69 1875 0.543 214
Dog 6/4.72 7/1.57 14.15 4.71 104.98 118.53 3225 0.273 394
Lynx 30/2.79 7/2.79 19.53 8.37 183.14 226.20 8192 0.158 842
cuckoo 24/4.62 7/3.08 27.72 9.24 402.33 454.48 12385 0.072 1519
Drake 26/4.44 7/3.45 28.11 10.35 402.50 467.94 14140 0.07171 1622
Rail 45/3.70 7/2.47 29.61 7.41 483.84 517.38 11874 0.060 1599
Cardinal 54/3.38 7/3.38 30.42 10.14 484.5 547.3 15262 0.060 1832

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SECTION-3 Page No.

CONTROL CABLES 79-82

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600/1000 V CONTROL CABLES

COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES
(Cu/PVC/PVC)

No. CONDUCTOR Thickness Thickness Approx. Approx.

Number Nominal And Nominal Max. Overall Cable
of Cors Area Diameter Resistance of of Diameter Weight
of Wire at 20 C Insulation Outer Sheath
No. Sqmm mm Ohm/Km mm mm mm Kg/Km
5 1.5 1/1.38 12.1 0.6 1.8 11.6 200
7 1.5 1/1.38 12.1 0.6 1.8 12.4 245
10 1.5 1/1.38 12.1 0.6 1.8 15.3 335
12 1.5 1/1.38 12.1 0.6 1.8 15.8 380
19 1.5 1/1.38 12.1 0.6 1.8 18.2 530
27 1.5 1/1.38 12.1 0.6 1.8 21.3 730
37 1.5 1/1.38 12.1 0.6 1.8 23.7 950
48 1.5 1/1.38 12.1 0.6 1.8 27.0 1200
52 1.5 1/1.38 12.1 0.6 1.9 27.8 1295
61 1.5 1/1.38 12.1 0.6 1.9 29.6 1490
5 2.5 1/1.78 7.41 0.7 1.8 13.1 265
7 2.5 1/1.78 7.41 0.7 1.8 14.2 340
10 2.5 1/1.78 7.41 0.7 1.8 17.5 470
12 2.5 1/1.78 7.41 0.7 1.8 18.1 540
19 2.5 1/1.78 7.41 0.7 1.8 21.0 770
27 2.5 1/1.78 7.41 0.7 1.8 25.0 1050
37 2.5 1/1.78 7.41 0.7 1.8 28.0 1385
48 2.5 1/1.78 7.41 0.7 1.9 32.0 1700
52 2.5 1/1.78 7.41 0.7 2.0 33.0 1915
61 2.5 1/1.78 7.41 0.7 2.0 35.0 2200

Core identification upto 5 Cores by colours viz.

Red, Yellow, Blue, Black, Green, and above by number
Cable construction is on the basis of BS 6346 /IEC 502 -
.
* on order stranded Control Cables Can also be made.

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600/1000 V CONTROL CABLES

COPPER CONDUCTOR PVC INSULATED
STEEL WIRE ARMOURED
PVC SHEATHED CABLES TO BSS 6346
(Cu/PVC/SWA/PVC)

Number CONDUCTOR Thickness Thickness Dia of Thickness Approx. Approx.

of of of Extruded Armour of Overall Cable
Cores Nominal No. And Max. Insulation Bedding Wire Outer Diameter Weight
Area Nominal Resistance Sheath
Diameter at 20 C
of Wire

No. Sqmm mm Ohm/Km mm mm mm mm mm Kg/Km

5 1.5 1/1.38 12.1 0.6 0.8 1.25 1.4
7 1.5 1/1.38 12.1 14.5 500
12.1 0.6 0.8 1.25 1.4 16.2 550
10 1.5 1/1.38 0.6 0.8 1.25 1.5 18.1 730
12 1.5 1/1.38 12.1 0.6 0.8 1.25 1.5
19 1.5 1/1.38 12.1 18.6 800
27 12.1 0.6 0.8 1.25 1.6 21.1 1050
1.5 1/1.38 0.6 1.0 1.6 1.7 25.4 1500
37 1.5 1/1.38 12.1
48 12.1 0.6 1.0 1.6 1.8 27.8 1800
1.5 1/1.38 0.6 1.0 1.6 1.8
52 1.5 1/1.38 12.1 30.8 2200
61 1.5 12.1 0.6 1.0 1.6 2.0 32.0 2300
1/1.38 0.6 1.2 2.0 2.1 35.0 2900
5 2.5 7.41
7 1/1.78 0.7 0.8 1.25 1.4 16.1 600
10 2.5 1/1.78 7.41 0.7 0.8 1.25 1.5
2.5 1/1.78 7.41 17.3 700
0.7 0.8 1.25 1.6 20.9 950
12 2.5 1/1.78 7.41 0.7 0.8 1.25 1.6
19 2.5 1/1.78 7.41 21.4 1010
27 2.5 7.41 0.7 1.0 1.6 1.7 25.4 1550
1/1.78 0.7 1.0 1.6 1.8 29.3 2000
37 2.5 1/1.78 7.41 0.7 1.0 1.6 1.8
48 2.5 1/1.78 7.41 32.4 2500
2.5 7.41 0.7 1.2 2.0 2.0 37.5 3350
52 1/1.78 0.7 1.2 2.0 2.1
61 2.5 1/1.78 7.41 38.5 3550
0.7 1.2 2.0 2.2 41.0 3950

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2 7
2
1 1 9 3
7 3 6 8
5 2 6 2
1 5 1 8 1 4
6 4 2
5 3
4 3 4 5 4 3 7 5
6

5 CORES 6 CORES 7 CORES 8 CORES 9 CORES

8 8
6 7 8 7 9 19 9
6 7 6 9 6 1 18 7 10
6 8 5 10
1 8 1 2 5 6 2
1 5 2
7 4 10 16 17 1 11
5 3 2 4 3 4 11 3 4

80
2 9 3
12 14 11 15 16 5 12
4 10 11 10
Allied Cables

3 13 12 14 13 12
15 13
14

10 CORES 12 CORES 14 CORES 16 CORES 19 CORES

10 27
20 8 9 11 26 13 15 16
24 12 17
19 11 25 14 30
9 21 23 3 12 4 5
7 2 13 29 14 18
18 8 12 10 4 24 11 15 6
6 10 22 1 5
2 20 3 1 14 28 13 1 2 7 19
17 1 7 1 13 9 5 23 10 3 2 16
5 21 6
3 11 2 15 27 12 4 3 8 20
19 6 4 8 6 22 9 17
16 4 5 20 16 8 7 9
12 14 7 26 11 10 21
18 21 18
19 17 22
15 14 13 15 18 20 19 25
24 23
17 16

20 CORES 21 CORES 24 CORES 27 CORES 30 CORES

ALLIED CABLES
 C Allied Cables ALLIED CABLES
Allied Cables

Control Cables in Flexible Sizes

Nominal Number Mean Mean Maximum Minimum Cable

Number cross and value of value of Approx. conductor insulation weight
of sectional diameter insulation sheath Overall resistance resistance (approx.)
core area of wire thickness thickness diameter at 20 C at 60 C
(mm2) (No/mm) (mm) (mm) (mm) ( Km) (M -Km) (Kg/Km)
0.5 16/0.20 0.6 1.2 9.5 39.0 0.026 95
0.75 24/0.20 0.6 1.2 10.0 26.4 0.023 120
5 1 32/0.20 0.6 1.2 10.0 19.5 0.021 130
1.5 30/0.25 0.6 1.2 11.0 13.3 0.018 170
2.5 50/0.25 0.7 1.4 13.5 7.98 0.016 260
4 56/0.30 0.8 1.4 15.5 4.95 0.015 360
0.5 16/0.20 0.6 1.2 10.0 39.0 0.026 110
0.75 24/0.20 0.6 1.2 10.5 26.4 0.023 130
6 1 32/0.20 0.6 1.2 11.0 19.5 0.021 150
1.5 30/0.25 0.6 1.2 12.0 13.3 0.018 190
2.5 50/0.25 0.7 1.4 14.5 7.98 0.016 300
4 56/0.30 0.8 1.4 17.0 4.95 0.015 430
0.5 16/0.20 0.6 1.2 10.0 39.0 0.026 120
0.75 24/0.20 0.6 1.2 10.5 26.4 0.023 140
7 1 32/0.20 0.6 1.2 11.0 19.5 0.021 170
1.5 30/0.25 0.6 1.2 12.0 13.3 0.018 210
2.5 50/0.25 0.7 1.4 14.5 7.98 0.016 330
4 56/0.30 0.8 1.4 17.0 4.95 0.015 470
0.5 16/0.20 0.6 1.2 10.5 39.0 0.026 130
0.75 24/0.20 0.6 1.2 11.5 26.4 0.023 160
8 1 32/0.20 0.6 1.2 12.0 19.5 0.021 190
1.5 30/0.25 0.6 1.2 13.5 13.3 0.018 260
2.5 50/0.25 0.7 1.4 16.0 7.98 0.016 370
4 56/0.30 0.8 1.4 18.5 4.95 0.015 540
0.5 16/0.20 0.6 1.2 11.5 39.0 0.026 150
0.75 24/0.20 0.6 1.2 12.0 26.4 0.023 180
9 1 32/0.20 0.6 1.2 13.0 19.5 0.021 220
1.5 30/0.25 0.6 1.4 14.5 13.3 0.018 290
2.5 50/0.25 0.7 1.4 17.0 7.98 0.016 420
4 56/0.30 0.8 1.4 19.5 4.95 0.015 610
0.5 16/0.20 0.6 1.2 12.0 39.0 0.026 170
0.75 24/0.20 0.6 1.2 13.5 26.4 0.023 210
10 1 32/0.20 0.6 1.2 14.0 19.5 0.021 250
1.5 30/0.25 0.6 1.4 15.5 13.3 0.018 310
2.5 50/0.25 0.7 1.4 18.0 7.98 0.016 470
4 56/0.30 0.8 1.4 21.0 4.95 0.015 680
0.5 16/0.20 0.6 1.2 12.5 39.0 0.026 180
0.75 24/0.20 0.6 1.2 14.0 26.4 0.023 240
12 1 32/0.20 0.6 1.4 14.5 19.5 0.021 280
1.5 30/0.25 0.6 1.4 16.0 13.3 0.018 360
2.5 50/0.25 0.7 1.4 19.0 7.98 0.016 540
4 56/0.30 0.8 1.4 22.0 4.95 0.015 790
0.5 16/0.20 0.6 1.4 13.5 39.0 0.026 210
0.75 24/0.20 0.6 1.4 14.5 26.4 0.023 260
14 1 32/0.20 0.6 1.4 15.0 19.5 0.021 300
1.5 30/0.25 0.6 1.4 17.0 13.3 0.018 400
2.5 50/0.25 0.7 1.4 20.0 7.98 0.016 590
4 56/0.30 0.8 1.4 23.0 4.95 0.015 860

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Control Cables Flexible

Nominal Number Mean Mean Approx. Maximum Minimum Cable

Number cross and value of value of Overall coductor insulation weight
of sectional diameter insulation sheath diameter resistance resistance (approx.)
core area of wire thickness thickness at 20 C at 60 C
(mm)
(mm2) (No/mm) (mm) (mm) ( /Km) (M - Km) (Kg/Km)
0.5 16/0.20 0.6 1.4 15.0 39.0 0.026 260
0.75 24/0.20 0.6 1.4 16.0 26.4 0.023 320
19 1 32/0.20 0.6 1.4 17.0 19.5 0.021 380
1.5 30/0.25 0.6 1.4 18.5 13.3 0.018 500
2.5 50/0.25 0.7 1.4 22.0 7.98 0.016 760
4 56/0.30 0.8 1.8 27.0 4.95 0.015 1,160

0.5 16/0.20 0.6 1.4 15.5 39.0 0.026 280

0.75 24/0.20 0.6 1.4 16.5 26.4 0.023 340
1 32/0.20 0.6 1.4 17.0 19.5 0.021 410
20 1.5 30/0.25 0.6 1.4 19.0 13.3 0.018 530
2.5 50/0.25 0.7 1.4 22.5 7.98 0.016 800
4 56/0.30 0.8 1.8 27.0 4.95 0.015 1,240
0.5 16/0.20 0.6 1.4 15.5 39.0 0.026 290
0.75 24/0.20 0.6 1.4 17.0 26.4 0.023 360
1 32/0.20 0.6 1.4 17.5 19.5 0.021 420
21 1.5 30/0.25 0.6 1.4 19.5 13.3 0.018 550
2.5 50/0.25 0.7 1.4 23.0 7.98 0.016 840
4 56/0.30 0.8 1.8 28.0 4.95 0.015 1,290

0.5 16/0.20 0.6 1.4 17.0 39.0 0.026 330

0.75 24/0.20 0.6 1.4 18.5 26.4 0.023 410
1 32/0.20 0.6 1.4 19.5 19.5 0.021 480
24 1.5 30/0.25 0.6 1.4 21.0 13.3 0.018 630
2.5 50/0.25 0.7 1.8 26.0 7.98 0.016 1,010
4 56/0.30 0.8 1.8 31.0 4.95 0.015 1,470
0.5 16/0.20 0.6 1.4 17.5 39.0 0.026 360
0.75 24/0.20 0.6 1.4 19.0 26.4 0.023 440
1 32/0.20 0.6 1.4 20.0 19.5 0.021 520
27 1.5 30/0.25 0.6 1.4 22.0 13.3 0.018 690
2.5 50/0.25 0.7 1.8 27.0 7.98 0.016 1,100
4 56/0.30 0.8 1.8 32.0 4.95 0.015 1,610
0.5 16/0.20 0.6 1.4 18.5 39.0 0.026 390
0.75 24/0.20 0.6 1.4 19.5 26.4 0.023 480
1 32/0.20 0.6 1.4 20.0 19.5 0.021 570
30 1.5 30/0.25 0.6 1.4 23.0 13.3 0.018 750
2.5 50/0.25 0.7 1.8 28.0 7.98 0.016 1,200
4 56/0.30 0.8 1.8 33.0 4.95 0.015 1,770

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SECTION-3 Page No.

FLEXIBLE WIRES AND CABLE 85-91

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FLEXIBLE WIRES AND CABLES

FLEXIBLE CONDUCTORS:
SOFT ANNEALED COPPER

SHEATH: PVC

750V 60 C PVC INSULATED AND SHEATHED FLEXIBLE CABLE.

NUMBER OF CORE :
CONDUCTOR Up to 4 cores.
:
Flexible annealed copper wires.
Sizes 0.5 mm 2 up to 95 mm 2 for single core.
0.5 mm 2 up to 35 mm 2 for multi core.
INSULATION PVC.
Colour : Single core - Black.
2 core - Light grey, Black.
3 core - Light grey, Black, Red.
4 core - Light grey, Black, Red, Blue.
SHEATH : PVC.
Colour : Black
CLASSIFICATION : Maximum conductor temperature 60 C.
: Circuit voltage not exceeding 750 volts.
CIRCUIT G VOLTAGE

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600/1000 Volts
Flexible anealed Copper wires
0.5 mm 2 up to 95 mm 2 for Single core
0.5 mm 2 up to 35 mm 2 for Multi Core.
Circuit Voltage not exceeding 750 Volts

Nominal Number Mean Mean Minimum Maximum

cross and value of value of Maximum insulation continuous Cable
Number sectional diameter insulation sheath overall resistance current weight
of area of wire thickness thickness diameter at 60 C rating (approx.)
core in free air
(mm2) (No/mm) (mm) (mm) (mm) (M - Km) (Kg/Km)
(Ampere)
0.5 16/0.20 0.8 1.0 5.2 0.032 9 29
0.75 24/0.20 0.8 1.0 5.4 0.028 11 33
1 32/0.20 0.8 1.2 5.9 0.025 13 41
1.5 30/0.25 0.8 1.2 6.2 0.022 16 48
2.5 50/0.25 0.8 1.2 6.7 0.018 22 60
4 56/0.30 0.9 1.4 7.8 0.017 30 90
6 84/0.30 0.9 1.4 8.4 0.014 39 110
1 10 80/0.40 1.1 1.8 10.6 0.013 57 210
16 126/0.40 1.1 1.8 11.6 0.011 75 270
25 196/0.40 1.3 2.2 14.2 0.011 99 410
35 270/0.40 1.3 2.2 15.6 0.009 120 540
50 396/0.40 1.5 2.6 18.3 0.009 150 750
70 360/0.50 1.5 2.6 20.2 0.008 190 980
95 475/0.50 1.7 3.0 23.0 0.008 210 1,300
0.5 16/0.20 0.8 1.2 8.2 0.032 8 80
0.75 24/0.20 0.8 1.2 8.6 0.028 10 90
1 32/0.20 0.8 1.2 9.0 0.025 12 95
1.5 30/0.25 0.8 1.4 9.9 0.022 15 120
2.5 50/0.25 0.8 1.4 10.8 0.018 21 160
2 4 56/0.30 0.9 1.6 12.7 0.017 28 230
6 84/0.30 0.9 1.6 14.2 0.014 36 290
10 85/0.40 1.1 1.8 17.3 0.013 52 510
16 126/0.40 1.1 2.0 20.3 0.011 69 710
25 196/0.40 1.3 2.4 24.2 0.011 90 1.030
35 276/0.40 1.3 2.6 27.0 0.009 110 1.380
0.5 16/0.20 0.8 1.2 8.6 0.032 7 90
0.75 24/0.20 0.8 1.2 9.0 0.028 9 100
1 32/0.20 0.8 1.4 9.8 0.025 10 120
1.5 30/0.25 0.8 1.4 10.4 0.022 13 140
2.5 50/0.25 0.8 1.4 11.4 0.018 18 190
3 4 56/0.30 0.9 1.6 13.6 0.017 24 280
6 84/0.30 0.9 1.8 15.3 0.014 31 370
10 80/0.40 1.1 2.2 18.7 0.013 45 650
16 126/0.40 1.1 2.4 22.0 0.011 60 900
25 196/0.40 1.3 2.6 26.0 0.011 78 1,320
35 276/0.40 1.3 2.8 29.0 0.009 96 1,770
0.5 16/0.20 0.8 1.4 9.6 0.032 6 110
0.75 24/0.20 0.8 1.4 10.2 0.028 8 130
1 32/0.20 0.8 1.6 11.0 0.025 9 150
1.5 30/0.25 0.8 1.6 11.6 0.022 12 180
2.5 50/0.25 0.8 1.6 12.8 0.018 16 240
4 4 56/0.30 0.9 1.8 15.2 0.017 22 350
6 84/0.30 0.9 2.0 17.0 0.014 29 480
10 80/0.40 1.1 2.2 20.8 0.013 41 820
16 126/0.40 1.1 2.6 24.3 0.011 54 1.50
25 196/0.40 1.3 2.8 28.8 0.011 71 1.680
35 276/0.40 1.3 3.1 32.3 0.009 88 2.290
BS 6004
BS 6500

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FLEXIBLE WIRES AND CABLES

FLEXIBLE CONDUCTOR
SOFT ANNEALED INSULATION: PVC SHEATH: PVC

: 250V 60 C PVC INSULATED AND SHEATHED FLAT TYPE, FLEXIBLE CONDUCTOR.

NUMBER OF CORES : 2 cores.
CONDUCTOR : Flexible annealed copper wires, size 0.5 mm2 up to 35 mm2
INSULATION : PVC.
Colour : Light grey, Black.
SHEATH : PVC.
Colour : Black or white.
CLASSIFICATION : Maximum conductor temperature 60 C.
Circuit voltage not exceeding 250 volts.

Mean Mean Average overall Minimum Maximum Cable

Number Nominal Number insulation continuous weight
of cross and value of value of diameter
insulation sheath resistance current (approx.)
core sectional diameter at 60 C rating in
area of wire thickness thickness (mm)
free air
(mm2 ) (No/mm) (mm) (mm) Lower limit Upper limit (M -Km) (Ampere) (Kg/Km)

28/0.15 0.6 0.9 3.8 x 5.8 4.6 x 6.6 0.026 6 38

0.5 6 38
0.5 16/0.20 0.6 0.9 3.8 x 5.8 4.6 x 6.6 0.026
32/0.20 0.6 0.9 4.7 x 6.5 4.9 x 7.2 0.021 9 55
1 12 75
1.5 30/0.25 0.6 1.2 5.0 x 7.6 5.7 x 8.3 0.018
50/0.25 0.7 1.2 5.6 x 8.8 6.3 x 9.5 0.016 17 110
2.5 22 150
2 4 56/0.30 0.8 1.2 6.2 x 10.1 7.0 x 10.9 0.015
84/0.30 0.8 1.2 7.1 x 11.8 7.9 x 12.6 0.013 29 200
6 41 330
10 80/0.40 0.9 1.2 8.2 x 14.1 9.3 x 15.1 0.011
126/0.40 1.0 1.2 9.5 x 16.6 10.5 x 17.6 0.010 55 460
16 73 700
25 196/0.40 1.2 1.4 11.6 x 20.4 12.9 x 21.7 0.009
276/0.40 1.2 1.4 12.8 x 22.9 14.1 x 24.2 0.008 91 940
35

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FLEXIBLE WIRES AND CABLES

INSULATION : PVC

FLEXIBLE CONDUCTORS:
SOFT ANNEALED COPPER

: 250V 60 C PVC INSULATED FLAT TYPE, FLEXIBLE CONDUCTOR.

NUMBER OF CORE :2
CONDUCTOR : Flexible annealed copper wires, size 0.5 mm2 up to 2.5 mm2
INSULATION PVC
Colour : Any colour with one different colour tracer on lateral
CLASSIFICATION side of wire, or colour thread at one of conductors.
: Maximum conductor temperature 60 C
CIRCUIT VOLTAGE : Circuit voltage not exceeding 250 volts.

Number Nominal Nominal Mean Maximum Minimum Maximum Cable

of cross and value of overall insulation continuous weight
core sectiona diameter insulation diameter resistance current rating (approx.)
area of wire thickness at 60 C in free air
(mm2) (No/mm) (mm) (mm) (M -Km) (Ampere) (Kg/Km)
0.5 28/0.15 0.8 3.3 x 5.8 0.032 7 22
0.5 16/0.20 0.8 3.3 x 5.8 0.032 7 22
0.75 42/0.15 0.8 3.5 x 6.2 0.028 9 27
2 0.75 24/0.20 0.8 3.5 x 6.2 0.028 9 28
1 32/0.20 0.8 3.7 x 6.6 0.025 11 33
1.5 30/0.25 0.8 3.9 x 7.1 0.022 14 44
2.5 50/0.25 0.8 4.4 x 8.0 0.018 20 65

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FLEXIBLE WIRES AND CABLES

CONDUCTOR: INSULATION: PVC

ANNEALED COPPER

250V 60 C PVC INSULATED FLEXIBLE CONDUCTOR, SINGLE CORE.

CONDUCTOR : Flexible annealed copper wires, sizes 0.5 mm 2 up to 2.5 mm 2

INSULATION : PVC - Any colour.
CLASSIFICATION : Maximum conductor temperature 60 C.
Circuit voltage not exceeding 250 volts.
CIRCUIT VOLTAGE

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CURRENT RATINGS
FLEXIBLE CORDS PVC TO BS 6500

Conductor Current Maximum

Rating premissible weight
Nominal cross (Subject to supported by
Number Volt drop) dc or a twin cord
sectional and 1 - phase or (See reg. B. 132
area diameter of wires 3 - phase I.E.E. Regs.)

mm 2 No./mm amp Kg
0.5 16/0.20 3 2
0.75 24/0.20 6 3
1.0 32/0.20 10 5
1.25 40/0.20 13 5
1.5 30/0.25 15 5
2.5 50/0.25 20 5
4.0 56/0.30 25 5

PVC insulated (non-armoured) cables

CONDUCTOR
SIZE
Nominal Area 1.0 1.5 1.5 2.5 2.5 4 6 10 16 25 35
mm2 (1/1.38) (7/0.50) (1./1.78) (7./0.67)

IN TRUNKING OR amps amps amps amps amps amps amps amps amps amps amps
CONDUIT
1 or 2 single core 11.14* 13.17* 13.17* 18.24* 18.24* 24.31* 31.40*
+ 1 twin 42.55* 56.73* 73.94* 90.115*
11 13 - 18 - 24 30 40 53 60 74
3 or 4 single core 9 11 11 16 16 28
+ 1 three or four 22 39 50 66 80
9 12 - 16 - 22 27 37 47 53 65
core

ON CABLE TRAY
OR CLIPPED
DIRECT TO
SURFACE
1 or 2 single core 13 16 16 23 23 30 38 51 68
+ 1 twin 89 109
12 15 - 21 - 27 35 48 64 71 87
3 or 4 single core 12 15 15 20 20 27 34 46 61 80 98
+ 1 three or four 10 13 - 18 - 24 30 41 54 62 72
core

The above ratings apply where coarse excess current protection is provided and are subject to voltage drop consideration
+ These ratings are for flat cables 1mm2 to 16mm2 inclusive and circular cables 25mm2 and 35mm2
For ratings of circular cables 1mm2 to 16mm2 inclusive refer to I.E.E. Regulations.

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VOLTAGE GRADES

PVC or insulated (non-armoured) cables

Approximate voltage drop per ampere per metre

CONDUCTOR
SIZE
Nominal Area 1.0 1.5 1.5 2.5 2.5 4 6 10 16 25 35
mm2 (1/1.38) (7/0.50) (1/1.78) (7/0.67)

IN TRUNKING OR
CONDUIT mV mV mV mV mV mV mV mV mV mV
mV
1 or 2 single core 40.42* 27.28* 30.32* 16.17* 16.18* 10.11* 68.72*
+ 1 twin 4.43* 26.22* 16.17* 12.12*
40 27 - 16 - 10 6.8 4.0 2.6 1.7 1.2
3 or 4 single core 35 23 26 14 8.8
+ 1 three or four 14 5.9 3.5 2.2 1.4 1.0
35 23 - 14 - 8.8 5.9 3.5 1.5 1.0
core 2.2

ON CABLE TRAY
OR CLIPPED
DIRECT TO
SURFACE
1 or 2 single core 40 27 30 16 16 10 6.8 4.0
+ 1 twin 40 2.6 1.6 1.2
27 - 16 - 10 6.8 4.0 2.6 1.7 1.2
3 or 4 single core 35 23 26 14 14 8.8 5.9 3.5 2.2 1.4 1.0
+ 1 three or four 35 23 - 14 - 8.8 5.9 3.5
core 2.2 1.5 1.0

+ Voltage drops are for flat cables 1mm2 to 16mm2 inclusive and circular cables 25mm2 and 35mm2
For volt drop ratings of circular cables 1mm2 to 16mm2 inclusive refer to I.E.E. Regulations.

VOLTAGE DROP
Cable described as 600/1000 volt are suitable for use on a circuit where the voltage to earth does not exceed 600 volt
and between conductors, 1000 volt. Cables, flexible Cables and Flexible Cords described as 450/750 volt. Cables.
Flexible Cables and Flexible Cord described as 300/500 volt are suitable for use on a circuit where the voltage to earth
does not exceed 300 volt and between conductors, 500 volt,
Total volt drop between consumers terminals and any other part of the installation must not exceed 2.5% of the
nominal voltage. Refer IEE Regulation & ERA Report.

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SECTION-5 Page No.

AUTOMOBILE WIRES 95-96

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AUTOMOBILE WIRES

CONDUCTOR:
INSULATION: PVC
ANNEALED COPPER

AV: 60 C LOW VOLTAGE FLEXIBLE CONDUCTOR FOR AUTOMOBILE

CONDUCTOR : Flexible annealed copper wire, sizes 0.5mm2 up to 95 mm2
INSULATION : PVC - Any colour.
CLASSIFICATION : Maximum conductor temperature 60 C. Low voltage circuit.
TESTING VOLTAGE : 5,000 volts.

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Low voltage wires

For Automobile

Nominal Number Average Mean Maximum Maximum

Number Approx. cotinuous Cable
of cross and straded of value of Overall conductor current weight
core sectional diameter conductor insulation diameter resistance rating (approx.)
area of wire diameter thickness at 20 C in free air
(mm2) (No/mm) (mm) (mm) (mm) ( /Km ) (Ampere) (Kg/Km)
0.5 f 20/0.18 0.95 0.6 2.1 36.6 8 8.5
0.5 16/0.20 0.95 0.6 2.1 37.1 8 8.5
0.75 f 30/0.18 1.15 0.6 2.3 24.4 11 12
0.75 24/0.20 1.15 0.6 2.3 24.7 11 11
1.0 f 40/0.18 1.35 0.6 2.5 18.3 13 14
1.0 32/0.20 1.30 0.6 2.5 18.5 13 14
1.25 f 50/0.18 1.50 0.6 2.7 14.7 15 17
1.25 40/0.20 1.50 0.6 2.7 14.8 15 17
1.5 f 60/0.18 1.60 0.6 2.8 12.2 16 20
1.5 30/0.25 1.60 0.6 2.8 12.7 16 19
1 2.5 f 100/0.18 2.10 0.7 3.5 7.33 23 32
2.5 50/0.25 2.10 0.7 3.5 7.60 23 31
4 56/0.30 2.60 0.8 4.1 4.71 31 48
6 84/0.30 3.20 0.9 4.9 3.14 40 70
10 80/0.40 4.60 1.1 6.7 1.82 58 130
16 126/0.40 5.60 1.1 7.7 1.16 75 190
25 196/0.40 6.90 1.4 9.6 0.743 99 290
35 276/0.40 8.30 1.4 11.0 0.527 123 400
50 396/0.40 9.90 1.6 13.0 0.368 153 560
70 360/0.50 11.80 2.0 15.5 0.259 198 800
95 475/0.50 13.60 2.0 17.5 0.195 240 1,030

f = More flexible.

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SECTION-6 Page No.

TELEPHONE AND COMMUNICATION

WIRE AND CABLE 98-104

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TELEPHONE WIRES

INSIDE-OUTSIDE STATION WIRE

ANNEALED COPPER CONDUCTOR

POLYETHYLENE INSULATION

POLYVINYL CHLORIDE SHEATH

APPLICATION : For general use inside a telephone subscriber station.

CONSTRUCTION : Conductor : 0.5 or 0.65 mm solid annealed copper.
Insulation : Polyethylene.
Identification : 2 - core : Red and Green.
3 - core : Red, Green and Yellow.
4 - core : Red, Green, Yellow and Black.
5 - core : Red, Green, Yellow, Black and White.
6 - core : Red, Green, Yellow, Black, White and Brown.

ELECTRIC CHARACTERISTICS AT 20 C :

Conductor size (mm) 0.5 0.6

Conductor resistance, maximum
Dielectric strength between conductor (3 seconds) Ohm/Km 92.3 62.8
Insulation resistance, minimum KV (dc) 3.0 3.6
Megohm-Km 16,000 16,000

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TELEPHONE WIRES

PVC INSULATED JUMPER WIRE

TINNED SOFT COPPER CONDUCTOR

POLYVINYL CHLORIDE INSULATION

APPLICATION : For making cross connections on distribution frames and in terminals in

the telephone exchanges.
CONSTRUCTION : Conductor : 0.6 or 0.65 mm tinned soft copper, solid.
Insulation : Polyvinyl chloride.
Lay-up : The require number of insulated conductors twisted
together.
Identification : Size 2 x 0.6 mm colour : Black and White..
: Size 3 x 0.6 mm colour : Red, White and Green.
: Size 4 x 0.6 mm colour : Black, White, Green, Blue
ELECTRICAL CHARACTERISTICS AT 20 C

Conductor size (mm) 0.60

Conductor resistance, maximum. Ohm/Km 65.0
Dielectric strength between conductor (2 seconds) KV rms 2.0
Insulation resistance, insulated conductor wound
helically in continuous turns round a metallic
mandrel, minimum Megohm-Km 200

Number and Nominal Nominal Approximate Approximate Standard

diameter of wires conductor insulation outside weight length
conductor diameter thickness diameter
(No/mm) (mm) (mm) (mm) (Kg/Km) (m)
2 x 0.6 0.5 0.3 0.4 6.0 400
3 x 0.6 0.5 0.3 2.6 9.0 400
4 x 0.6 0.65 0.3 2.7 8.9 400

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TELEPHONE WIRES
PVC INSULATED CONNECTING AND JUMPER WIRE

TINNED SOFT COPPER CONDUCTOR

POLYVINYL CHLORIDE INSULATION

APPLICATION : For making cross connections on distribution frames and in terminals in

the telephone exchanges.
CONSTRUCTION : Conductor : 0.5 or 0.65 mm tinned soft copper, solid.
Insulation : Polyvinyl chloride.
Colour : Blue, Yellow, Red, White, Brown, Green, Black or
: Orange.
ELECTRICAL CHARACTERISTICS AT 20 C
Conductor size (mm) 0.5 0.60

Ohm/Km 95.0 62.8

Conductor resistance, maximum
Insulation resistance, insulated conductor wound
helically in continuous turns round a metallic
mandrel, minimum. Megohm-Km 200 200

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TELEPHONE AND COMMUNICATION CABLES

POLYETHYLENE INSULATED AND PVC SHEATHED

TERMINATING CABLE

POLYETHYLENE INSULATED CONDUCTOR

NON HYGROSCOPIC TAPE

POLYVINYL CHLORIDE SHEATH (IVORY)

APPLICATION : For connecting subscriber equipment inside the building.

CONSTRUCTION : Conductor : 0.5, 0.65 and 0.9 mm tinned soft copper, solid.
Insulation : Polyethylene.
Pairs : Two insulated conductors twisted.
Lay-up : Twisted pairs concentrically stranded.
core-covering : Non-hygroscopic tape.
Sheath : Polyvinul chloride (Ivory).

ELECTRICAL CHARACTERISTICS AT 20 C
Conductor size (mm) 0.5 0.60 0.9
Conductor resistance, maximum Ohm/Km 95.0.1 65.0 30.0
Mutal capacitance at 1000 Hz, maximum average (Max) F/Km 0.056 0.056 0.56
Dielectric strength between conductor (2 seconds) KV 3.0 3.6 4.5
Insulation resistance, minimum Megohm-Km 16,000 16,000 16,000

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Pvc Insulated and Pvc Sheathed Cable

Telecommunication

Conductor Number Nominal Nominal Approximate Approximate Standard

diameter of insulation sheath overall length
thickness thickness diameter cable weight
(mm) pairs (mm) (mm) (mm) (Kg/Km) (m)

3 0.21 1.0 5.8 35 500

4 0.21 1.0 6.3 42 500
5 0.21 1.0 6.7 49 500
6 0.21 1.0 6.9 54 500
8 0.21 1.2 7.9 73 500
10 0.21 1.2 8.2 84 500
11 0.21 1.2 8.4 89 500
0.5 12 0.21 1.2 8.7 95 500
15 0.21 1.2 9.4 113 500
16 0.21 1.2 9.6 119 500
20 0.21 1.2 10.5 142 500
21 0.21 1.2 10.7 147 500
25 0.21 1.2 11.4 170 500
30 0.21 1.2 12.3 197 500
40 0.21 1.4 14.2 263 500
50 0.21 1.4 15.6 320 500
3 0.28 1.0 6.9 50 500
4 0.28 1.2 7.9 67 500
5 0.28 1.2 8.5 78 500
6 0.28 1.2 8.8 86 500
8 0.28 1.2 9.5 106 500
10 0.28 1.2 9.9 123 500
11 0.28 1.2 10.2 132 500
0.60 12 0.28 1.2 10.5 142 500
15 0.28 1.2 11.5 170 500
16 0.28 1.2 11.8 179 500
20 0.28 1.4 13.3 227 500
21 0.28 1.4 13.5 236 500
25 0.28 1.4 14.5 272 500
30 0.28 1.4 15.7 320 500
40 0.28 1.4 17.6 409 500
50 0.28 1.6 19.8 510 500
3 0.35 1.2 8.9 84 500
4 0.35 1.2 9.8 104 500
5 0.35 1.2 10.7 123 500
6 0.35 1.2 11.1 139 500
8 0.35 1.2 12.0 172 500
10 0.35 1.4 13.3 217 500
11 0.35 1.4 13.5 233 500
0.9 12 0.35 1.4 14.0 250 500
15 0.35 1.4 15.3 301 500
16 0.35 1.4 15.8 321 500
20 0.35 1.4 17.3 388 500
21 0.35 1.4 17.6 404 500
25 0.35 1.6 19.4 487 500
30 0.35 1.6 20.9 569 500
40 0.35 1.8 24.0 753 500
50 0.35 1.8 26.4 915 500

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TELEPHONE WIRES

POLYETHYLENE INSULATED AND PVC SHEATHED

PARALLEL DROP WIRE

COPPER COVERED STEEL CONDUCTOR

POLYETHYLENE INSULATION

POLYVINYL CHLORIDE SHEATH (BLACK)

APPLICATION For extending an open wire line or distribution cable pair for a pole or
cable terminal to a building.

CONSTRUCTION Conductor : 1.0 mm Copper Covered Steel wire

Insulation : Polyethylene (Black)
Sheath : Polyvinyl chloride (Black).

ELECTRICAL CHARACTERISTICS AT 20 C
Conductor size (mm) 1.0
Conductor resistance, maximum Ohm/Km 140
Dielectric strength, (5 seconds in water) KV (dc) 2.5
Insulation resistance, insulated conductor wound Megohm-Km 5000

Number
and diameter Nominal Nominal Nominal Approximate
or wires conductor insulation sheath overall
in conductor diameter thickness thickness dimension

(No/mm) (mm) (mm) (mm) (mm)

2 x 1.0 1.0 0.7 0.4 6.8 x 3.2

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SECTION-7 Page No.

SPECIAL CABLES 107

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We have know-how and

expertise of manufacture of
Special Cables as per
Customer requirement

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SECTION-8 Page No.

TECHNICAL INFORMATION 111-119

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A. ELECTRICAL FORMULAS

Electrical fomulas for determining Ampere, Kilowatt, Kilovolt ampere and Horse power

ALTERNATING CURRENT
DIRECT CURRENT SINGLE PHASE THREE PHASE

KW x 1000 KW x 1000 KW x 1000

A = A = A = 1.73 x V x P.F.
V V x P.F.

KVA x 1000 KVA x 1000 KVA x 1000

A = A = A =
V V 1.73 x V

HP x 746 HP x 746 HP x 746

A = A = A = 1.73 x V x (% Eff.) X P.F.
V x (% Eff.) V x (% Eff.) X P.F.

AxV A x V x P.F. A x V x 1.73 X P.F.

KW = 1000 KW = KW = 1000
1000

AxV AxV A x V x 1.73

KVA = 1000 KVA = 1000 KVA =
1000

A x V x (% Eff.) A x V x (% Eff.) X P.F. A x V x 1.73 x (% Eff.) X P.F.

HP = HP = HP =
746 746 746

APPROXIMATE MOTOR AMPERES PER H.P.

1phase 220 V a-c = 4 amperes per H.P.
3 phase 220 V a-c = 2.5 amperes per H.P.
3 phase 380 V a-c = 1.41 amperes per H.P.

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B. WIRE GAUGES IN COMMON USE:

Gauge Diameter Sectional area Weight
B.W.G. A.W.G. S.W.G. mm.G. Mil mm Cir . Mill In2 mm 2
Ib/1,000 ft kg/km
5/0 - 7/0 - 500 12.700 250,000 .1964 756.9 1,126
126.7
- - - 12 472.4 12.000 223,162 .1753 113.1 675.6 1,005
- - 6/0 - 464 11.786 215,296 .1691 109.1 651.7 969.9
- 4/0 - - 460 11.684 211,600 .1662 107.2 640.5 853
4/0 - - - 454 11.532 206,100 .1619 104.4 624 928.1
- - 5/0 - 432 10.973 186,624 .1466 94.56 565 840.6
3/0 - - - 425 180,600 546.9
10.795 .1419 91.52 813.6
- 3/0 - - 409.6 10.404 167,772 .1318 85.03 508 755.9
- - 4/0 - 400 10.160 160,000 .1257 81.07 584.5 720.7
- - - 10 39.37 10.000 155,000 .1217 78.54 468 698.2
2/0 - - - 380 9.652 .1134
144,400 73.17 437.1 650.5
- - 3/0 - 372 9.440 138,384 .1087 70.12 623.4
418.9
- 2/0 - - 364.8 9.266 133,079 .1045 67.42 402.7 599.4
- - - 9 354.3 9.000 125,528 .09859 63.62 380 565.6
- - 2/0 - 348 8.839 121,104 .09512 61.36 366.6 545.5
0 - - - 340 8.636 115,600 .09079 58.58 349.9 520.8
- 0 - - 324.9 105,560 319.5 475.5
8.250 .08291 53.49
- - 0 - 324 104,976 .08245 53.19 317.8 472.8
8.230
- - - 8 315 8.000 99,225 .07793 50.27 300.3 446.9
1 - 1 - 300 7.629 90,000 .07069 45.60 272.4 405.4
- 1 - - 289.3 7.348 83,694 .06573 42.41 253.3 377
2 - - - 284 7.214 80,660 .06335 40.87 244.2 363.3
- - 2 - 276 7.010 76,176 .05983 39.60 230.6 343.2
- - - 7 275.6 7.000 75,955 .05966 38.48 229.9 342.1
3 - -
- - 259 6.579 67,080 .05269 33.99 203.1 302.2
- 2 - 257.6 200.9
6.5 6.544 66,358 .05212 33.63 299.0
- - - 255.9 65,485 189.2 295
- 6.500 .05143 22.18
- - 3 252 6.401 63,504 .04988 32.18 192.2 286.1
4 - - 238 171.5
- 6.045 56,640 .04449 28.70 255.1
- - 6.0 236.2 55,790 168.9 251.1
- 6.000 .04382 28.27
- - 4 - 232 5.893 53,824 .04227 27.27 162.9 242.4
- 3 - - 229.4 5.827 52,624 .04133 26.66 159.3 237
5 - - - 220 5.588 48,400 .03801 24.52 146.5 218
- - - 5.5 216.5 5.500 46,872 .03681 23.72 141.9 210.9
- - 5 - 212 5.385 44,944 .03530 22.77 136 202.4
- 4 - - 204.3 5.189 126.3
41,738 .03278 21.15 188
6 - - - 203 5.156 41,210 .03237 20.88 124.8 185.6
- - - 5.0 196.9 5.000 38,770 .03.045 19.63 117.4 174.5
- - 6 - 192 4.877 36,864 .02895 18.68 111.6 166.3
- 5 - - 181.9 4.621 33,088 .02599 16.77 100.2 149.1
7 - - - 180 4.572 32,400 .02545 16.42 98.08 146
- - - 4.5 177.2 4.500 31,400 .02466 15.90 95.04 141.4
- - 7 - 176 4.470 30,976 .02433 15.70 93.77 139.6
- - - - 165 4.191 27,220 .02138 13.80 82.40 122.7
8 6 - - 162 4.115 26,244 .02061 13.30 79.43 118.2

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Gauge Diameter Sectional area Weight

B.W.G. A.W.G. S.W.G. mm.G. Mil mm Cir . Mill In2 mm 2
Ib/1,000 ft kg/km
- - 8 - 160 4.064 25,600 .02011 12.97 77.50 115.30
- - - 4.0 157.5 4.000 24,806 .01948 12.57 75.08 111.80
9 - - - 148 3.759 21,900 .01720 11.10 66.29 98.68
- 7 - - 144.3 3.665 20,822 .01635 10.55 63.01 93.79
- 9 144 3.658 20,736 .01629 10.52 62.78 93.52
- -
- - - 3.5 137.8 3.500 18,989 .01491 9.621 57.46 85.53
10 - - - 134 3.404 17,960 .01410 9.098 54.34 80.88
- 8 - - 128.5 3.264 16,512 .01297 8.368 49.99 74.39
- - 10 - 128 3.251 16,384 ..01287 8.302 49.60 73.81
- 126 3.200 15,876 .01247 8.042 48.06 71.49
- - 3.2
11 - - - 120 14,400 .01131 7.297 43.59 64.87
3.048
- - 11 - 116 13,456 .01057 6.818 40.74 60.61
2.946
- 9 - - 114.4 13,087 .1028 6.632 39.62 58.96
2.906
- - - 2.9 114.2 13,042 .1024 6.605 39.47 58.72
2.900
- - - 109 11.880 .009331 6.020 35.96 53.52
12 2.769
- - 12 - 104 10,816 .008495 5.481 32.74 48.73
2.642
- - - 2.6 102.4 2.600 10,486 .008246 5.309 31.78 47.29
- 11 - - 101.9 2.588 10,384 .008156 5.262 31.43 46.78
13 - - - 95 2.413 9,025 .007088 4.573 27.32 40.65
- - 13 - 92 2.337 8,464 .006648 4.289 25.62 38.13
- 11 - - 90.74 2.305 8,234 .006467 4.172 24.92 37.09
- - - 2.3 90.55 2.300 8,199 .006439 4.155 24.82 36.94
14 - - - 83 2.108 6,889 .005411 3.491 20.85 31.04
- 12 - - 80.81 2.053 6,530 .005129 3.309 19.77 29.42
- 14 - 80 2.032 6,400 .005027 3.243 19.37 28.83
-
- - - 2.0 78.74 2.000 6,200 .004869 3.142 18.77 27.93
15 - 15 - 72 1.829 5,184 .004072 2.627 18.46 27.36
- 13 - - 71.96 1.828 5,178 .004067 2.624 15.67 23.33
- - - 1.8 70.87 1.800 5,023 .003945 2.545 15.20 22.63
16 - - - 65 1.651 4,225 .003318 2.141 12.79 19.03
- 14 - - 1.628 4,106 .003225 2.081 12.43 18.50
64.08 18.45
- - 16 - 1.626 4,096 .003217 2.075 12.40
64 17.88
- - - 1.6 1.600 3,968 .003116 2.011 12.01
62.99 15.16
17 - - - 1.473 3,364 .002642 1.705 10.18
58 14.67
15 - 1.450 6,257 .002558 1.650 9.859
- - 57.07
- - 17 - 56 1.422 3,136 .002463 1.589 9.493 14.13
- - - 1.4 55.12 1.400 3,038 .002386 1.539 9.196 13.68
- 16 - - 50.82 1.291 2,583 .002029 1.309 7.820 11.64
18 - - - 49 1.245 2,401 .001886 1.217 7.269 10.82
- - 18 - 48 1.219 2,304 .001810 1.167 6.976 10.38
- - - 1.2 47.24 1.200 2,232 .001753 1.31 6.756 10.06
- 17 - - 45.26 1.150 2,048 .001608 1.037 6.197 9.219
19 - - - 42 1.067 1,764 .001385 0.8938 5.388 7.946
- 18 - - 40.30 1.024 1,624 .001275 0.8226 4.914 7.313
- - 19 40 1.016 1,600 .001157 0.8107 4.845 7.207
-

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Gauge Diameter Sectional area Weight

Ib/1,000 ft kg/km
2
B.W.G. A.W.G. S.W.G. mm.G. Mil mm. Cir . Mill In2 mm

- - - 1.0 39.37 1.000 1,550 .001217 0.7854 4.690 6.982

- - 20 - 36 0.9144 1,296 .001018 0.6476 3.923 5.838
- 19 - - 35.89 0.9116 1,288 .001012 0.6529 3.900 5.804
- - - .90 35.43 0.9000 1,255 .0009857 0.6362 3.799 5.565
20 - - - 35 0.8890 1,255 .0009621 0.6207 3.708 5.518

21 - 21 - 32 0.8128 1,024 .0008042 0.5189 3.099 4.613

- 20 - - 31.96 0.8118 1,021 .0008019 0.5174 3.091 4.600
- - - .80 31.50 0.8000 992.3 .0007794 0.5027 3.004 4.469
- 21 - - 28.46 0.7229 810 .0006362 0.4105 2.452 3.649

22 - 22 - 28 0.7112 784 .0006158 0.3973 2.373 3.532

- - - .70 27.56 0.7000 759.6 .0005966 0.3848 2.299 3.421

- - - .65 25.59 0.6500 654.8 .0005143 0.3318 1.982 2.950
- 22 - - 25.35 0.6438 642.6 .0005047 0.3256 1.945 2.895
23 - - - 25 0.6350 625 .0004909 0.3167 1.892 2.816
- - 23 - 24 0.6096 576 .0004524 0.2919 1.744 2.595
- - - .60 23.62 0.6000 557.9 .0004382 0.2827 1.689 2.513
- 23 - - 22.57 0.5733 5.9.4 .0004001 0.2581 1.542 2.295
24 - 24 - 22 0.5583 484 .0003801 0.2452 1.465 2.180
- - - .55 21.65 0.5500 468 .0003681 0.2376 1.419 2.112
- 24 - - 20.10 0.5106 4.4 .0003173 0.2047 1.223 1.820
- - 20 1.211 1.802
25 25 0.5080 400 .0003142 0.2027
- 50 19.69 1.174 1.745
- - 0.5000 387.7 .0003045 0.1963
- - 18 .0002545 0.9809 1.460
26 26 0.4572 324 0.1642
25 - 17.90 0.4547 .0002516 0.9697 1.443
- - 320.4 0.1623
- 45 17.72 0.4500 314 .0002466 0.1590 0.9504 1.414
- -
- - 27 - 16.1 0.4166 269 .0002113 0.1844 1.212
0.1363
24 - - - 16 0.4064 256 .0002011 0.1297 0.7750 1.153
- 26 - - 15.94 0.4049 254.1 .0001996 0.1288 0.7693 1.145
- - - 40 15.75 0.4000 248.1 .0001949 0.1257 0.7512 1.118
- - 28 - 14.8 0.3759 219 .0001720 0.1110 0.6629 0.9868

- 27 - - 14.20 0.3606 201.6 .0001583 0.1021 0.6101 0.9077

28 - - - 14 0.3556 196 .0001539 0.09932 0.5931 0.8330
- - - 35 13.78 0.3500 189.9 .0001491 0.9621 0.5746 0.8553

- - 29 - 13.6 0.3454 185 .0001453 0.09372 0.5600 0.8332

29 - - - 13 0.3302 169 .0001327 0.08563 0.5114 0.7613
- 28 - - 12.64 0.3211 159.8 .0001255 0.08097 0.4837 0.7198
- - - 30 12.60 0.3200 158.8 .0001246 0.08042 0.7806 0.7149
- - 30 - 12.4 0.3150 153.8 .0001208 0.07791 0.4656 0.6926
30 - - - 12 0.3048 144 .0001131 0.07297 0.4359 0.6487
- - 31 - 11.6 0.2946 134.6 .001057 0.06818 0.4074 0.6061
- - - 29 11.42 02900 130.4 .0001024 0.06605 0.3947 0.5872
- 29 - 11.26 0.2859 126.8 .00009959 0.06425 0.3838 0.5712
-
- - 32 10.8 0.2743 116.6 .00009158 0.05913 0.3530 0.5257
- 104.9
- - - 10.24 0.2600 .00008239 0.05309 0.3175 0.4720
26 100.6
- 30 - 10.03 0.2546 .00007901 0.05097 0.3045 0.4531

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Gauge Diameter Sectional area Weight

2
B.W.G. A.W.G. S.W.G. mm.G. Mil mm. Cir . Mill In2 mm Ib/1,000 ft kg/km
31 - 33 - 10 0.2540 100 .00007954 0.05067 0.3027 0.4505
- - 34 - 9.2 0.2337 84.64 .00006648 0.04289 0.2562 0.3813
- - - .23 9.055 0.2300 81.99 .00006440 0.04155 0.2482 0.3694
32 - - - 9 0.2286 81.102 .00006362 0.04104 0.2452 0.3649
- 31 - - 8.928 0.2238 79.71 .00006260 0.04039 0.2413 0.3591

- - 35 - 8.4 0.2134 70.56 .00005542 0.03575 0.2136 0.3178

33 - - - 8 0.2032 64 .00005027 0.03243 0.1937 0.2883
- 32 - - 7.950 0.2019 65.20 .00004964 0.03203 0.1913 0.2847
- - - .20 7.874 0.2000 62 .00004869 0.03142 0.1877 0.2793
- - 36 - 7.6 0.1930 57.76 .00004536 0.02927 0.1748 0.2602
- - - .18 7.087 0.1800 50.23 .00003945 0.02545 0.1520 0.2263
- 33 - - 7.080 0.1798 50.13 .00003937 0.02540 0.1517 0.2258
34 - - - 7 0.1778 49 .00003848 0.02483 0.1483 0.2207
- - 37 - 6.8 0.1727 46.24 .00003632 0.02343 0.1400 0.2083
- 34 - - 6.305 0.1601 39.75 .00003122 0.02014 0.1203 0.1790
- - - .16 6.299 0.1600 39.68 .00003116 0.02011 0.02011 0.1201
- - 38 - 6 0.1524 36 .00002827 0.01824 0.1090 0.1622
- 35 - - 5.615 0.1426 31.53 .00002476 0.01597 0.09543 0.1420
- - - .14 5.512 0.1400 30.38 .00002386 0.01539 0.09196 0.1368
- - 39 - 5.2 0.1321 27.04 .00002124 0.01370 0.08186 0.1218

35 36 - - 5.000 0.1270 25 .00001963 0.01267 0.07565 0.1126

- - 40 - 4.8 0.1219 23.04 .00001810 0.01167 0.06976 0.1037
- - - .12 4.724 0.1200 22.32 .00001753 0.01131 0.06756 0.1006
- 37 - - 4.453 0.1131 19.83 .00001557 0.01005 0.06001 0.08934
- - 41 - 4.4 0.1118 19.36 .00001521 0.009810 0.05812 0.08721
36 - 42 - 4 0.1016 16.00 .00001257 0.008107 0.04845 0.07207
- 38 - - 3.965 0.1007 15.72 .00001235 0.007968 0.04760 0.07084
- - - .10 3.937 0.1000 15.50 .00001217 0.007854 0.04690 0.06982
- - 43 - 3.6 0.09114 12.96 .00001018 0.006567 0.03923 0.05838
- 39 - - 3.531 0.08969 12.47 .000009794 0.006319 0.03775 0.05618
- - 44 - 3.2 0.08138 10.24 .000008042 0.005819 0.03099 0.04613
- 40 - - 3.145 0.07987 9.891 .000007768 0.005012 0.02994 0.04456
- 41 45 - 3.800 0.07113 7.842 .000006159 0.003773 0.02374 0.03532
- 42 - - 2.494 0.06334 6.219 .000004884 0.003151 0.01882 0.02801
- 46 - - 2.4 0.06096 5.760 .000004528 0.002929 0.01744 0.02595
- 43 - - 2.221 0.05641 4.932 .000003873 0.002495 0.01498 0.02222
- - 47 - 2 0.05080 4.000 .000003142 0.002027 0.01211 0.01802
- 44 - - 1.987 0.05023 3.911 .000003072 0.001982 0.01184 0.01762
- - - .05 1.969 0.05000 3.877 .000003045 0.001963 0.01174 0.1645
- 45 - - 1.761 0.04473 3.102 .000002436 0.001572 0.009383 0.01398
- - 48 - 1.6 0.04064 2.560 .000002011 0.001297 0.007750 0 . 0 11 5 3
- 46 - - 1.568 0.03984 2.460 .000001931 0.001246 0.007446 0.01108
- 47 - - 1.397 0.03547 1.951 .000001532 0.0009884 0.005904 0.008787
- 48 - - 1.244 0.03159 1.547 .000001215 0.0007838 0.004683 0.006968
- - 49 - 1.2 0.03048 1.400 .000001131 0.0007297 0.004359 0.006487

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B. Wire guage in Common use Contd.

Guage Diameter Sectional area Weight
2
B.W.G. A.W.G. S.W.G. mm.G. Mil mm. Cir. Mil in mm2 Ib/1,000 ft kg/km

- 49 - - 0.108 0.02813 1.227 .0000009635 0.0006216 0.003713 0.005526

- - 50 - 1 0.02540 1.000 .0000007854 0.0005067 0.003027 0.004505
- 50 - - 0.986 0.02505 0.9728 .0000007641 0.0004929 0.002945 0.004382

NOTE : B.W.G. - Brimingham Iron Wire Gauge

A.W.G. - American Wire Guage

S.W.G. - British Standard Wire Guage

mm.G. - Millimeter Guage

C. SYMBOLS OF ELECTRICAL UNITS

ELECTRICAL UNIT SYMBOL

CURRENT (AMPERE) A
VOLTAGE (VOLT) V (KV)
RESISTANCE (OHM) K M )
ELECTRICAL POWER (WATT) W (KW,MW.)
ELECTIRICAL ENERGY (WATT HOUR) WH (KWH).
HORSE POWER HP
POWER FACTOR (COS) P.F.
FREQUENCY (HERTZ) HZ
CAPACITANCE (FARAD) F (UF, PF.)
APPARENT POWER (VOLT, AMPERE) VA (KVA)
DIRECT CURRENT DC
ALTERNATING CURRENT AC
EFFICIENCY Eff.

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D. STANDARD COEFFICIENT OF CONVERSION

ITEMS DESCRIPTIONS

1. LENGTH 1 mil = 0.0254 mm = 0.001 in.

1 mm = 39.37 mils = 0.3937 in.
1 cm = 0.3937 in. = 0.0328 ft.
1 inch = 25.4 mm = 0.083 ft. = 0.0278 yd. = 2.54 cm.
1 feet = 0.305 m = 0.333 yd.
1 yard = 0.914 m = 91.44 cm.
1 meter = 39.37 in. = 3.28 ft. = 1.094 yd.
1 kilometer = 2,281 ft. = 1.094 yd. = 0.6213 mile
1 mile = 5,280 ft. = 1.760 yd. = 1.609 = 1.609 km.

2. AREA 1 MCM = 1000 CM (Circulator Mil) = 0.5067 mm 2 = 1/1000 in 2

1 CM = 0.0005067 mm 2 = 0.0000007854 in2 =0.7854 sq. mil
1 mm 2 = 1973 CM = 0.00155 in2 = 1,550 sq. Mil.2
1 in 2 = 1273240 CM = 645.1 mm2 = 0.0069 ft.2
1 yd 2 = 1,296 in 2 = 0.83613 m2
2
1 m2 = 1,550 in 2 = 10.7 ft.2 = 1.195 yd.
1 km 2 = 0.001562 mile 2
1 mile 2 = 27, 880.000 ft 2 = 3,098,000 yd.2 = 2,590,000 m2 =2.59 km2

3. VOLUME 1 cm3 = 0.061 In 3

1 in3 = 16.39 cm 3 = 0.0036 gal = 0.0005787 ft.3
1 I. = 1,000 cm 3 = 61.023 in 3 = 0.2642 gal. = 0.03531 ft.3
1 gal. = 3,785 cm 3 = 231 in 3 = 0.1337 ft.3 = 0.004951 yd3
1 ft.3 = 28,317 cm 3 = 1,728 in 3 = 28.32 i. = 7.48 ga.
1 yd.3 = 46,656 in 3 = 0.7646 m3
1 m3 = 61,023 in 3 = 35.31 ft. 3 = 1.308 yd.3

4. WEIGHT 1 g. = 15.43 gr. = 0.03527 0z. = 0.002205 lb.

1 oz. = 437.5 gr. = 28.35 g. = 0.0625 lb.
1 lb. = 7,000 gr. = 453.6 g. = 16 oz. = 0.4536 kg.
1 kg. = 15,432 gr. = 35.27 oz. = 2.205 ob.
Ton (short) = 2,000 lb = 907.2 kg. = 0.8928 ton (long)
Ton (long) = 2,240 lb. = 1.12 ton (Short) = 1.016 tor (metric)
Ton (metric) = 2,204.62 lb.

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(Imperial) to metric and metric to (imperail) approximately)

(each group is listed in alphabetic order)
COLUMN A x MULTIPLIER = COLUMN B
COLUMN B x RECIPROCAL = COLUMN A
Exaple: Yards (col aA) x 0.194 (multiplier) = Metres (Col B)
Metres (Col B) x 1.093 (Reciprocal) = Yards (Col A)

E. CONVERSION FACTORS :

Column A Column B Multiplier Reciprocal

Length
cm in 0.03937 25.4
ft m 0.3048 3.2808
in mm 025.4 0.03937
in cm 2054 03937
km mile 0.6214 1.6093
km yd 1093.6 0.000914
m in 39.37 0.0254
m ft 3.2808 0.3048
m yd 1.0936 0.9144
mile km 1.6093 0.6214
mm in 0.03937 25.4
yd km 0.000914 1094.09
yd m 0.9144 1.0936
Area
cm 2 in 2 0.1550 6.4516
ft 2 m2 0.0929 10.7652
in 2 cm 2 6.4516 0.155
in 2 mm2 645.16 0.0015
m2 ft 2 10.7639 0.0929
m2 yd 1.1960 0.8361
yd 2 m2 08361 1.1960
Volume
cm (or: mililitre)
0.0610 16.393
ft 3 I n3 0.0283 35.3335
ft 3 m3 6.229 0.1605
ft 3 gal (British) 28.328 0.0353
gal (British) l i t r e ( d m3 ) 0.1605 6.2305
gal (British) f t3 0.00455 219.78
gal (British) m3 4.546 0.2199
gal (British) l i t r e ( d m3 ) 1.2009 0.8327
in3 gal (USA) 16.387 0.0610
dm3 (or : litre) c m3 0.219 4.566
dm3 (or : litre) gal (British) 0.264 3.7878
dm3 (or : litre) gal (USA) 0.0353 28.328
dm3 (or : litre) f t3 1.7597 0.5682
m3 pint 35.3147 0.0283
m3 f t3 1.3079 0.7645
m3 y d3 220.0 0.00455
m3 gal (British) 1000.0 0.001
yd3 litre dm3) 0.7645 1.2079
m3
Mass

cwt Kg 50.802 0.0197

kg lb 2.2046 0.4536
kg cwt 0.0197 50.791
kg ton (long) 0.000984 1016.05
kg t 0.001 1000.0
oz gr 28.349 0.0352
lb kg 0.4536 2.204
lb t 0.00454 220.26
ton (long) t 1.016 0.9842
ton (long) kg 1016.05 0.000984

Force

Kft or : kp Lbf 2.2046 0.4535

Kft or : kp N 9.8065 0.1019
kN ton (long) f 0.1003 9.97
lbf N 4.4482 0.2248
lbf kgf 0.4535 2.2046
lbf pdl 32.1740 0.0311
pdl kgf 0.01409 70.9723
pdl N 0.1382 7.2359
pdl dyne 13825.5 0.0000723
ton (long) f t (metric) of Velocity 1.0160 0.9842
ton (long) f kN 9.9640 0.10036

Velocity
ft/s m/s 0.3048 3.2808
ft/min m/s 0.00508 196.850
ft/min m/min 0.3048 3.2808
ft/min km/h 0.01828 54.7046
km/h mile/h 0.6213 1.6095
m/s km/h 3.6 0.2777
m/h km/h 1.6093 0.6213

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SECTION-9 Page No.

GLOSSORY OF ELECTRICAL TERMS 122-126

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GLOSSARY OF ELECTRICAL TERMS

Term Definition

system Of currents of voltages. A set of currents or voltages appertaining to a

circuit.

symmetrical polyphase A polyphase [m-phase] system of sinusoidal currents or voltages of the

[m-phase] system same frequency in which the currents of voltages are equal in magnitude
and have equal phase displacements.
balanced system A system of currents in a circuit having three or more conductors one of
which may be a neutral conductor, the currents in the line conductors
being equal in magnitude and their rectorial sum zero.
phase (As an adjective). Applied to a part of a polyphase [m-phase] system,
circuit or device appertaining to a specific alternating voltage, e.g. Blue-
phase winding.

polyphase; (As an adjective). Applied to a system, circuit, or device in which three

m-phase are several [m] alternating voltage of the same frequency, the phases of
which are cyclically diplaced by frection of a period.
single-phase (As an adjective). Applied to a system. Circuit, or device in which
is a single alternating voltage.
symmetrical components A method of analyzing a three-phase system of sinusoidal currents or
voltages into symmetrical systems. The set of two or three symmetrical
systems of currents or voltages into which the system can be resolved
are the possitive-sequence, negative-sequence and zero-sequence com-
ponents when present.
Positive sequence : The order in which the three alternating currents or voltages of a three-
possitive phase-sequence phase system attain a maximum of given sign.
The order which is the reverse of the possitive phase-sequence.
negative sequence :
negative-sequence
possitive [negative]- (As adjective) Used in connection with the method of symmetrical
components in the analysis of an unbalanced or unsymmetrical three-
sequence
phase system of sinusoidal currents are voltages of the same frequency
to denote that components which is a symmetrical three-phase system
with positive [negative] sequence.
(As adjective) Used in connection with the method of symmetrical
zero-sequence
components in the analysis of an unbalance three-phase system of
sinusoidal current or volages of the same frequency to denote that
component which consists of three single-phase currents or voltages of
system frequency which are in phase with each other.

netural (As adjective) 1. Of a polyphase system. A conductor connected to the

star point. (As a noun.) 2. Of a 3-wire single phase or d.c. System.
The conductor on which the intermediate voltage appears.
netural (As an adjective). Applied to a components or quantity appertaining to
a neutral.

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Term Definition
neutral point
Of a symmetrical m-phase system of voltages. An artificial point of
reference given by the star point of a star connection of m resistors of
equal resistance connected to the conductors on which the voltages
oppear.
star connection In a polyphase device or system of devices. The arrangement in
which the corresponding end, i e. Either the ‘starting’ or ‘finishing’ end
is connected to a common point and the other end of each phase is
connected to a separate terminal.
star point In a star connection. The common point.
Y connection A three-phase star connection .
zigzag connection
A modification of the star connection used to eliminate any component
of triple frequency.
mesh connection
In a polyphase device or system of devices. The arrangement in which
the end of each phase is connected to the beginning of the next in
sequence so as to form a ring, each point of connection being connected
to a terminal.
delta connection A three-phase mesh connection with three terminals.
open-delta connection
A delta connection in which one possible point of connection is left
open and three are four terminals, two of which may not be used,
V conneciton A delta connection with one phase omitted.

line-to-line voltage:
In a circuit. The voltage between two line conductors.
line voltage
line-to-neutral voltage; In a circuit. The voltage between a line conductor and the neutral.
phase voltage

booster A generator or transformer inserted in a cirucit for the purpose of altering

the magnitude or phase of the voltage acting in the circuit.

quadrature booster A booster so arranged as as to add to the main voltage a commponents

variable at will which leads the main vltage or lags behind it by a

phase angle of /2 radians.

The assembly of coils forming one phase of a polyphase winding.
Phase winding:
phase
A spacer between adjacent packets of laminations to provide a duct for
duct spacer the coolant.

core duct The space between or through core laminations provided to permit the
radial or axial flow of the collant.

phase convertor A device for converting the power of an alternating current system having
a given number of phases into a system having another number of phases
but of the same frequency.

back-to-bacl test A test on a device under conditions approximating closely to those of

full load, in which the device is connected electrically to and, if
appropriate, mechanically coupled to another similar device so that a
circulation of energy through the devices can be produced, the losses
in them being supplied from an external source.

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Term Definition
low voltage A voltage normally not exceeding 250 volts.
medium voltage A voltage normally exceeding 250 volts, but not exceeding 650 volts.
high voltage
A voltage normally exceeding 650 volts.

Power cable terminology

Term Definition
conductor Of a cable or core. The conducting portion, consisting of a single wire
or of a group of wires assembled together and in contact with each other
or connected in parallel.
Uninsulated conductor A conductor with no provision for its insulation from earth.
plain conductor A conductor consisting of one metal only
tinned conductor A conductor (usually copper) the wire or wires of which are covered
with a thin coating of tin.
composite conductor A conductor consisting throughout its lenth of two or more metal
conductors providing parallel paths sharing the load.
NOTE.- This shoudl not be confused with composite (telephone) cable which
contain insulated wires of different sizes but not of different metals.
solid conductor
A conductor consisting of a single wire, which may be composite.
stranded conductor A conductor made up of a number of wires twisted toether. When the
sonductor consists of more than one layer, alternate layers are twisted in
opposite directions.
bunched conductor
A started conductor a which all wires are twisted together in the same
direction, and with the same by throughout.
NOTE - In telecommunication engineering bunched conductors are connected
together at both ends but insulated from each other throughout their length,
circular conductor
A conductor the cross-section of which is circular.
shaped conductor A conductor the cross-section of which is other that circular.
segmental conductor
A conductor the cross-section of each segment of which is a radial
section of an annuals.
locked-coil conductor
A standed conductor in which the outer wires are so shaped that
when assembled with a lay they are locked in position against radia
movement.
core
Of a cable. A single conductor with its inculation but not inculuding
any mechanical protective covering.
cable
A lentgh of single insulator conductor (solid or stranded) or two or more
such conductors each provided with its own insulation which are laid up
together The insulated conductor or conductors may or may not be
provided with an overall mechanical protective covering.
single cable
A cable containing one core only.
twin cable
A cable containing two cores not arranged connecntrically.

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Term Definition
three-core cable A cable containing three cores not arranged concentrically.
multicore cable A cable containing three or more cores not arranged concentrically.
scab An adhesion of scale or other matter causing damage to the surface of
wire or strip
spill A defect in wire or strip caused by a portion of the metal having been
partially detached from and subsequently embedding in the remainder.
split A division in the body of a wire running lengthwire for a considerable
distance, and which will open on bending.
length of lay Of a cable. The axial length of one complete turn of the helix formed
lay by the core, in the case of a cable. Or of the wire, in the case of a
stranded conductor.
lay ratio The ratio of the axial length of a complete turn of the helix formed by
the core of a cable. Or the wire of a stranded conductor. To the mean
diameter of the helix.
cross-sectional area Of a conductor of a cable The sum of the cross sectional areas of the
componenet wires of the conductor, that of each wire being measured
perpendicular to its individual axis.
calculated effective area Of a conductor of a cable. The area of a solid conductor of the same
resistivity and having the same resistance as that of an equal length of
the cable. In the case of a split conductor cable, the calculated effective
area is the sum of the cross sections of each of the two or more sections
into which the conductor is divided.
rated voltage Of cable. The voltage for which the different parts of the dielectric of
a cable are designed.
lead
A terms sometimes used as a synonym for a conductor.
thermal resistance Of a cable The resistace to the flow of heat, expressed in thermal
ohms, of one centimetre length of the cable, offered by the path from
the conductor to the external surface of the cable (lead sheath or
protective covering)
Loop test A method of testing used to locate a fault in the insulation of a
conductor, in which the faulty conductor is arranged to form part of a
closed circuit or loop.
belted cable A multicore cable in which part of the dielectric is applied to each
conductr individually and the remainder is in the form of an overal belt
split-conductor cable A cable in which each conductors is divided into two or more sections
insulated from each other and normally connected in parallet.
flexible cable A cable containing one or more cores, each formed of a group of wires,
the diameters of the cores and of the wires being sufficiently small to
afford flexibility.
flexible cord A flexible cable having conductor of small cross-sectional area. Two
flex flexible cords twisted together are known as twin flexible cord.

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Term Definition
concentric cable A cable containing two or more separate conductors, arranged concentri-
cally, with insulation between them. Unless otherwise qualified, the
term denotes a cable consisting of two conductors only

triple concentric cable A concentric cale containing three conductors.

pressure cable A cable in which the dielectric is maintained at a pressure in excees of
athmospheric pressure.
Gas-pressure cable A pressure cable in which the pressure medium employed is an inert gas
impregnated gas-pressure A mass-impregnated paper-insulated cable with a mechanically reinforced
cable lead sheath in which the space inside the lead sheath is brought up to
hig pressure by the introduction of inset gas in contact with the
dielectic.
compression cable A mass-impregnated pressure cable in which the pressure medium is not
in contact with the dielectric.
dry gas-pressure cable An Unprignated paper-insulated cable with a methanically reintorced
lead sheath in which the spaced inside the lead sheath is brought up to
high pressure by the introduction of inert gas in contact with the
dielectric.
oil-filled cable An impregnated paper-insulated cable so designed that the impregnating
medium is free to flow at all working temperatures.
oilosatic cable An oil-filled cable in which the sheath is replaced by a steel tube and
in which the impregnating medium in maintained under a pressure
substantially in exceess of atmosphere
Pre-impregnated cable A paper-insulated cable in which the paper tapes are impregnated before
application and not subsequently impregnated.
mass-impregnated cable A paper-insulated cbale in which the paper tapes are applied unimpreg-
nated. The complete cable being subsequently dried and impregnated
with compund as a whole
drained cable A mass-impregnated cable fro which the free impregnating compund,
is removed by draining at a temperature in excess of the maximum
working temperature

non-bledding cable A gneeric term for cable of the impregnated type which will not exude
the impregnating material under working conditions. (It may be of
either the drained or ht epre-impregnated type.)

smooth-conductor cable A cable in which a smooth matallic layer in intimate contact with the
conductor is interposed between the conductor and the dielectric; the
object being to prodie the conductor with a smooth surface instead of
the corrugated surface existing in the cse of a stranded conductor.

screened cable As used for electricity supply. A multicore cable in which the insulated
Shield conductor cable of each conductor is separately enclosed in a conducting film in order to
H type cabl.e
ensure a radial electric field surrounding the conductor. The films being
Hochstadter cable
in electrical connection with one another and with the metallic shath of
the cable and usually earthed.

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