'l#lm

Cen No: Cl/6532 063

 ffi
Eastern Cables Limited, a Subsidiary
Company of Bangladesh Steel &
Engineeiing CorPoration (BSEC),
situated at the Port City of Chittagong, is
the biggest Cable and Conductor
manufaclurer in Bangladesh. The range
o{ its products not only includes PVC
insulated and PVC sheathed single core
and multicore low tension domestic
cables but also control, flexible and
power cables with copper conductor
having continuous permissible voltage
grade upto 12 KV. lt also enjoys th.e
ionour of being the Pioneer in this
country tn the production of armoured
and screened cables. The different sizes

constant research and development work

over a period of hundred years is being
shared by Eastern Cables Ltd. from its
very inception. lnvestment has been made
most generously for the procurement of a
most modern manufacturing plant and
sophisticated laboratory equipments lo
make quality cables and conductor as per
international slandard speci{ications
Quality Control Laboratories and modern
PVC comPounding Plant ensure the
Physical, Chemical and Electrical properties
of all products as per specifications. The

of Bare and Insulated All Aluminium

Conductor (AAC) and Aluminium
Conductor Steel Reinforced (ACSR)
are also being manufactured here.

Eastern Cables Ltd. manufactures

its products strictly according to the
Standard specifications' This stamp
of quaiily is ensured by the facts that
the cables are being manufactured
under licence f rom the world
renowned Kable-Werke-Reinshagen
GmbH of GermanY. lt is a matter of
great pride that the lruits of
accumulated exPerience of Kabel - (coNTINUED TO THIRD COVER)
Werke - Reinshagen enriched bY its
 GENERAL GUIDE TO THE DIFFERENT NOMENCLATURES & CODE DESIGNATION
USED IN THIS PUBLICATION

Nomenclature lnterpretation

VDE - Union of German Electrical Engineers

B.S. - British Standard
N - According to VDE standard (VDE 0250 & VDE 0271)
B -According to British Standard (8.S. 0004)
I -According to B.S. 2004 (lmperiatsystem)
Y - lnsulation or sheath of thermoplastic based on pVC (polyvinyl chtoride)
A - lnsulated single core wire
M - Sheathed wire
F - Flat cable (VDE 0250 & B.S.)
T - Supporting wire rope
E - Earth continuity Conductor
C - Concentric conductor of copper
H - Field limiting conducting layers over the conductor and over the insulation
S - Shield of copper
SE - Field limiting conducting layers over each individual conductor and
insulation and shield of copper over each individual core (the code
letter H is left out in this case)
F - Galvanised steel flat wire armouring (VDEO271)
R - Galvanised steel round wire armouring
Gb - Helical galvanised steeltape
I - lnternational colour code : Cable possessing a green-yellow
identification core
re - conductor of single solid wire having circular cross-section
rm - conductor of multiple stranded wires having circular cross-section
SM - conductor of multiple stranded wires having sector shaped cross-section

Code designation !nterpretation

As per VDE 0250

NYA - PVC insulated single core cable.
NYIFY - PVC insulated and pVC sheathed flat cable.
NYMT - PVC insulated and PVC sheathed cable with supporting steelwire rope.
 Cable according to B. S. (B)

Conductor of copper, stranded round (rm)

PVC insulation (Y)
Nonsheathed single core (A)

TYPE : BYA

Cable according to VDE (N)

Conductor of copper, sector shaped (sm)

PVC insulation (Y)
PVC or textile tape
PVC sheath (Y)

TYPE: NYY

Cable according to VDE standard

Conductor of copper, Stranded round (rm)
PVC insulation (Y)
PVC or rubber filling
Galvanised Steel flat wire armouring (F)
Helical galvanised steel tape (Gb)
PVC Sheath (Y)

TYPE : NYFGbY

2
 Cable according to VDE standard (N)
Conductor of copper, stranded round (rm)
PVC insulation (Y)
PVC or rubber filling
Shield of copper (S)
PVC Sheath (Y)

TYPE : NYSY

Cable according to VDE standard

Conductor of copper, stranded round (rm)
Field limiting conductrng layers over conductor
PVC insulation
Field limiting conducting layers over conductor
Semi Conducting tape
Shelf of copper over individual core (SE)
PVC or rubber filling
PVC inner Sheath (Y)
Galvanised steel flat wire (F)
Helical galvanised steel tape (Gb)
PVC outer Sheath (Y)

TYPE: NYSEYFGbY

3
As per B.S. 6004 & BDS 9OO

BYA - PVC insulated non-sheathed single core cable'

BYFY - PVC insulated & PVC sheathed flat cable.
BYFYE - PVC insulated & PVC sheathed flat cable with earth
continuity conductor.
BYM - PVC insulated & PVC sheathed cable.

As perVDE0271 & BDS 901

NYY - PVC insulated and PVC sheathed cable.

NYY-I - PVC insulated and PVC sheathed cable having

international colour code, i.e., one of the cores being
coloured green/yellow.

NYFGbY - Cable with PVC insulation, flat steelwire armouring and

helical steel taping over common covering of cores and pvc
sheath, i.e., flat wire armoured NW type of cable.

NYRGbY - Cable with PVC insulation, round steelwire armouring and

helical steel taping over common covering of cores and
PVC sheath, i.e., round wire armoured NW type of cable.

NYCY - Cable with PVC insulation, concentric conductor of copper

over common covering of cores and PVC sheath,i.e., NW
type of cable having a concentric conductor of copper. The
conductor of the half core of a three and half core cable or
of the fourth core of a four core cable is arranged
concentrically over the common covering of the remaining
three cores. Similar$ copper screening of screened control
cable is arranged concentrically around the cores.

NYSY - Cable with PVC insulation, shield of copper over common

covering of cores and PVC sheath. The minimum cross
sectional area of the copper shield is 16 mm2

NYHSY - Single core cable with PVC insulation, field limiting

conducting layers over the conductor and also over the
insulation, copper shield and PVC sheath. The minimum
cross sectional area of the copper shield is 16mmz

4
 ZA"^
€,@.1)
\Gi/

NYSEY - Multicore cable with PVC insulatiort, field limiting

conducting layers over each individual conductor and over
each individual core copper shield also over each individual
core and overall PVC sheath. The minimum total cross
sectional area of the copper shield of the individual cores,
all of which remain in electrical contact with each other, is
16 mm2. The cable may be said as a multicore NyHSy
type of cable.

NYSEYFGby - Multicore cable with PVC insulation, field limiting

conducting layers over each individual conductor and core,
copper shield also over each individual core, pVC inner
sheath over common covering of cores, flat steel wire
armouring, helical steel taping and pVC outer sheath, i.e.,
flat wire armoured NYSEY type of cable.

Definitions
Voltage designation - The voltage designation indicates the rated voltage Eo/E
for which these cdbles are designed, where Eo is the
power frequency voltage to earth and E is the power
frequency voltage between conductors.

Nominalvalue - lt is the value which must be maintained within the

tolerance as laid down in corresponding standard.

Approximate value - lt is the value which should lie within commercial or

production technique tolerance.

Service Voltage - lt is the voltage which locally exists between the line
conductors or between the conductor and the earth.

Permissible Service Voltage - lt is the maximum permissible voltage

with which the cable
can be used in continuous undisturbed operation. ln case
of all voltage grades of cables as per VDE 0250 it is 15%
higher than the rated voltage (E) in case of 1 kV cables, as
per VDE 0271 itis 20o/o higher for alternating current and
50% higher for direct current and in case of 6 kV and 10 kV
cables as per VDE 0211 it is 20% higher for three phase
system and 15o/o higher for single phase system.

5
 RATINGS OF
TABLES ON CONSTRUCTION, WEIGHT AND NORMAL CURRENT
WIRES AND CABLES MADE AS PER B.S. 6004 & B.S. 2OO4
TABLE:01
450/750 Volts
Type : BYA as per B.S. 6004 & BDS 900 = 2010
ft'aimoniseA c6Oe designation : HOTV - U for solid conductor
HOTV'R for Stranded conductor

piff,anneal Copper.,eo.nduetofi.p\l.e''iniaulated;i,'',:,:'"' "" :

sfritr*+ar,nret*,*'t *ai*'miunted+embedega'eort uiti-t3'rf '

installationinlightingfittingsandinsideappliancesu
Single core
Current Rating
Norminal No. and D.C. Nominal Over all Approximate
Bunched and
Cross nominal Resistance thickness diameter Weight
Enclosed in
Sectional Diameter cf each core of upper conduit two
of at 20oc lnsulation limit cables single
Area of
phase at sino[e
Conductor wires (Maximum) at 35uc
35'c

mm mm Kg/Km Amps Amps

mm2 No/mm Ohm/km

1 x 0.50 re 1 / 0.80 36.000 0.6 2.14 I ..'...

24.500 0.6 2.33 12 :
1 x 0.75 re 1 / 0.98 1,) 16
0.7 3.00 16
1 x 1.00 re I I 1.13 1 8.1 00
13 16
1 8.1 00 0.7 3.00 17
1 x 1.00 rm 3 / 0.65 19
0.7 3.21 21 15
1 x 1.30 rm 310.74 14.036
3.30 22 16 20
1 x 1.50 re 1 / 1.38 11.900 0.7 '16
3.30 23 20
1 x '1.50 rm 3 / 0.80 11 .900 0.7
23 16 20
1 x 1.50 rm 7 / 0.53 .900
1'1 07 3.40
3.61 29 IU 25
1 x 2.00 rm 3 / 0.91 9.108 0.7
3.90 32 22 28
1 x 2.50 re 1t1.78 7.140 0,8
4.20 33 22 28
1 x 2.50 rm 7 10.67 7.140 0.8
0.8 4.43 42 lb 31
1 x 3.00 rm 7 10.74 5.999
30 J/
4.470 0.8 4.80 51
1 x 4.00 rm 7 / 0.85 41
5.00 58 35
1 x 4.50 rm 7 10.91 3.892 0.8 ta
+t
5.40 71 3B
x 6.00 rm
1 7 11.05 2.970 0.8
B6 42 51
7 11.12 2.605 1.0 6.02
x 7.00 rm
1
117 a/- 63
7 11.35 1.770 1.0 6.80
1 x 10.00 rm 67 81
7.75 166
1 x 14.50 rm / / t.oJ 1.231 1.0
/U 85
1.120 1.0 8.00 179
1x 16.00 rm 7 I 1.71 7i B5
1.120 1.0 8.00 180
1x 16.00 rm 19 / '1 .05 110
1.2 9.80 276 91
1x 25.00 rm 7 12.14 0.708 '110
1.2 9.80 278 91
1x 25.00 rm 19 / 1.30 0.708
.00 373 112 136
19 / 1.53 0.514 1.2 11
1x 35.00 rm 136 164
0.379 1.4 13.00 532
'1 x 50.00 rm 19 / 1.83 207
15.00 732 173
1 x 70.00 rm 19 12j7 0.262 1.4
253
1.6 17.00 985 216
1 x 95.00 rm 1912.52 0.1 89

6
TABLE: 02
300/500 Volts
Type : BYFY as per B.S. 0004 & BDS 900 : 2010

Specffication
Plain inneateo Copper Conductor, FvC insulated two or three cores laid flat and pVC
sheathed.
S.-'it=taie.i:or fireo instaJtationi in=tgrr,roi-*mp:,piimises,a'1d-fs,E:.installaion.,in
wallS or boardi and in channels or embedded in plaster.

Twin core

Norminal No. and Nominal Nominal Current Rating

Over all Approximate
Cross nominal thickness thickness dimensions Weight Enclosed in Clipped to a
Sectional Diameter conduit one surface or on a
of of upper
cable single cable kay
Area of of lnsulation Sheath limit phase at one cable
Conductor wires 35',c single phase
at 35'c
mm2 No/mm mm mm mm Kg/Km amps amps
2x1.0re 1I 1.13 0.6 c.9 7.4x4.7 53 13 15
2x1.5re 1t1.38 0.7 0.9 8.4 x5.4 65 16 18
2x2.5 re 1 I 1.78 0.8 't.0 9.8 x 6.2 9B 22 26
2x4.0 rm 7 / 0.85 0.8 1.0 11.5 x7 .2 152 30 33
2x6.0rm 7 t1.05 0.8 1.1 '13.0 x 8.0
205 J/ 43
Three Core

Clipped to a
surface or on a
cable tray
one cable
single phase
at 35uc

3x1.0re 1 I 1.13 9"8 x 4.7 76

'1.5
11 12
3 x re 1t1.38 11.5 x 5.4 96 15 16
3x2.5re 1 I 1.78 13.5x6.2 145 20 22
3x4.0rm 7 t0.85 16.5 x7 .4 229 37 30
3x60rm 7 t1.05 18.0 x 8.0 30'1 33 37
 A'@,
W
Type : BYFYE as per B.S. 6004 & BDS 900 : 2010

pecifi'catioll. -r: ,' ,r.

plain.'ario aled,,eooper::.Conducto 'PtlC.,insubted.'hffo'g6re'fl6t'cebie"with'''earth
Continul$, cond trctor and.PVe.'sheathed
Suitable'foti use in.rfixedt,installation-s'ih'd .ort:da,r.np.-p.!gr.xises, 'and'for--instaffaioa"in
walls' on, boards :and' in,'channils .orr,embeddedin'plaster r'''
Colour of Sheath : GreY

Twin core

Clipped to a
surface or on a
cable kay
one cable
single phase
at 35'c

2x1.0re I I 1.13 0.6 86x47 68 13 15

2x1.5re 1 / '1.38 0.7 96x54 81 16 18

'11
0x62 114 22 26
2 x2.5 re 1 I 1.78 0.8
1r)
13.0 x7 .2 177 30
2x40rm 7 / 0,85 0.8
15 0 x 8 0 244 JI 43
2x60rm 7 I 1.05 0.8

* Three core cables are also manufactures on demand

L-
TABLE: 04
300/500 Volts
Type : BYM as per B.S. 6004 & BDS 900 :2010

,$pecification, ' ,.',

Pkin' annealed Copper eonductory PVe insulated, . single,, Two' fhree'or' Four cores
:
:

laid.,up,filleO,With rubbe rt P\/'S sheathed,r ; .,',' ,', ,;' .',,

,Suitab'le.for'use'in fixed.,installatiols in:d1y,or,.g*p, prernises,clipped direct.to a
surfacsor on ca5letrAy,unenclosed:andr'alsofor'use in,conduit.enclosed.. ' ,::,'
eolou.r.,of Sheath :.€rey ., ; .',',,
Single core

Clipped to a
surface or on a
cable tray
one cable
single phase
at 35uc

1 x 1.00 re 1 I 1.13 0.6 08 4.5 13

1 x 1.50 re 111.38 0.7 0.8 4.9 16
1x2.50 re 1 I 1.78 0.8 08 5.8 22
1 x 4.00 rm 7 / 0.85 0.8 0.9 6.8 30

1 x 6.00 rm 7 t1.05 0.8 0.9 7.4 96 38 47

x '10.00 rm II t.57 1.0 0.9 8,8 147 52 63
x '16.00 rm 7 t1.71 1.0 1.0 10.5 218 70 85
x 25.00 rm 7 t2.14 1.2 1.1 12.5 328 91 110
x 35.00 rm 19 / '1.53 1,2 1.1 '13.5
432 112 136

Twin Core
2x1.0re 1t1.13 0.6 1.2 8.8 93 13 15
2x1.5re 1 t1.38 0.7 1.2 10.0 119 16 18
2x2.5 re 1 I 1.78 0.8 1.2 11.5 165 22 26
2x4.0 rm 7 t0.85 0.8 1.2 12.5 228 JU 33

2x6.0rm 7 t1.05 0.8 1.2 14.0 294 43

2 x 10.0 rm 7 t1.35 1.0 1.4 17.5 485 50 bU
2 x 16.0 rm 7 I 1.71 1.0 1.4 20.0 673 66 80
2x25.0 rn 7 t2.14 1.2 1.4 24.0 1 004
'7tr
8B
2 x 35.0 rm 19/1.53 1.2 1.6 27.5 1347 92 108
TABLE: 04 Gontd.

Three Core
Current Rating
Norminal No. and Nominal Nominal Over all Approximate
ln conduit Clipped to a
Cross nominal thickness thickness diameter Weight
single phase surface or on a
Sectional Diameter of of
at 35oc cable tray
Area of of lnsulation Sheath
single phase
Conductor wires at 35oc

mm2 No/mm mm mm mm Kg/Km amps amps

3x1.0re I I 1.13 0.6 1.2 9.2 106 11 12

3x1.5re 1 / 1.38 0.7 1.2 10.5 139 15 16

3x2.5re 1 I 1.78 0.8 1.2 12.0 195 20 22

3x4.0rm 7 / 0.85 0.8 1.2 13.0 268 27 JU

3x6.0rm 7 I 1.05 0.8 1.4 15.5 386 33 37

3 x 10.0 rm 7 11.35 1.0 1.4 19.0 590 46 ct

3 x 16.0 rm 7 I 1.71 1.0 1.4 21.5 856 58 67
'1.6 26.0 1272 bb 77
3 x 25.0 rm 7 12.14 1.2

3 x 35.0 rm 19 / 1.53 1.2 1.6 29.0 1 685 81 90

Four Core
4x1.0re 111.13 0.6 1.2 9.8 124 11 12
'11.5 164 15 16
4x1.5re 1 / 1.38 0.7 1.2

4x2.5re 1 I 1.78 0.8 1.2 13.0 224 20 22

4x4.0rm 7 / 0.85 0.8 1.4 14.5 342 27 30

4x6.0rm 7 I 1.05 0.8 1.4 17.0 464 33

'1.0 20.5 719 40 51
4 x 10.0 rm 7 11.35 1.4

4 x 16.0 rm 7 I 1.71 1.0 1.4 23.5 1 051 5B 67

4 x 25.0 rm 7 12.14 1.2 1.6 28.5 1 600 66

a4 90
4 x 35.0 rm 19 / 1.53 1.2 1.6 32.0 2085 U!

10
 GURRENT GARRYING CAPACIry OF CABLES MADE AGCORDING TO B.S. 6004,
B. S.2004 & BDS 900 :2010

1. Normal Conditions
This basis of the current ratings of cables in tables 01 to 0Z has been so chosen for
normal ambient temperature of our country of 350C and for normal laying conditions
as follows-

A. For groups of unenclosed systems of single core cables:

i) The horizontal clearance between the systems is not more than 150 mm and
not
less than six times the individual cable diameter or one time the overall width
of the
individual system.
ii) The vertical clearance between systems is not less than 150 mm.

iii) lf the number of systems is more than four, they are installed in a horizontal plane.

B. For groups of unenclosed multicore cables :

i) The horizontal clearance between cables is not more than 150 mm and not
less
than six times the individual cable diameter_
ii) The vertical clearance between cables is not less than 150 mm.

iii) lf the number of cables is more than four, they are installed in horizontal plane.

2. Deviated conditions
lf the actual conditions of installations are not same as normal conditions,
the current
rating values given in Tables 01 to 07 are to be multiplied with the
rating factors as
given below:

11
Variation of Ambient Temperature

TABLE:05
Rating Factors for Variation of Ambient temperature

oC 30 35 40 45 50 55 60
Ambient temperature 25

Rating factors for cable having

excess-current protection, which 1.13 1.06 1 0.93 0.84 0.76 0.65 0.53
will operate within four hours at 1,5
times of the designed load current

Rating factors of cables having 1.05 1.03 I 0.97 0.94 0.91 0.79 0.65

no excess-current protection as above

Grouping of systems or Cables made as per B. S. 6004 : & B. S. 2004 :

TABLE:06
Group Rating Factors for Single-core Cables in Three-phase System in Air

o
o '10
Number of Systems 2 J 4 5 6

Rating Factor 0.80 0.69 0.62 0.59 0.55 0.51 0.48

TABLE:07
Group Rating Factors for Multicore Cables in Air

Number of Cables 2 4 5 6 8 10

Rating Factor 0.80 0.70 0.65 0.60 0.57 0.52 0.48.

12
 TABLES ON CONSTRUCTION, WEIGHT AND NORMAL CURRENT RATINGS
OF
WIRES AND CABLES MADE AS PER VDE O25O

TABLE:8
600/1000 Volts
Type : NYA as per VDE 0250/3.69

i-zT .

Specif,iia iofi, 'r' , ,

P)lain.annealed,Copper.Conductor.pvP'- lated-: -. .. .,,:

suitable for use in rnotor and switch panels'and,in distribution equiptmeni; , -,.
ca.bles of 1 .Srmm2'and above are for u$e in conduit ovei, and undei'Dlas*e1, , ,.. .
,

a.ndr.:over 'insulating, bodies. over ,plaster:in dry, ,ruo**' for:

continuous'permissrble
service voltage of 69011'l50 volts

Single core

* Current rating at
35oC ambient termp

1x0.5 re 1 / 0.80 7-7 lEAF

0.6 Z,J 8 12
1 x 0.75 re 1 / 0.98 25.3968 0.6 2.5 11 14
1x1.0 re 1 I 1.13 18.7301 0.6 2.6 14 1; 17
x 1.5 re
'1
1t1.38 12.5926 0.6 2.9 19 14 22
1x2.5 re 1 I 1.78 7.5555 0.7 ?6 30 18 30
1x4.0 re 1 12.26 4.7302 0.8 4.1 47 23 39
1x6.0 re 1 t2.77 3.1428 0.8 4.7 67 30 50
'1
x 10.0 re 1 t3.57 1 8730 1.0 6.0 'i10 42 69
'1
x 16.0 re 1 t4.52 1.1852 1.0 6.9 168 92

* Current
ratings are valid for the cables laid under normal conditions
as detailed at page 19

13
 TABLE:9
2201380 Volts

Type : NYIFY as per VDE 0250/3.69

Specification
PEin.anneai6d.g s.'-aad

'Stita,blg. '*SAin-.o.r'u'ftddrt tait .O,*.',fOo.ffC:'fu rvice

v,qltqg!.,o1.2.55-144$.v,:',. -,:-:.,''..t..'
ColoJr of sheath : White

Twin core
*
Cross No. and D. C. Nominal Nominal Maximum Approx. Current

thickness outer Weight rating at

Section approximate resistance thickness
of dimensions 350C ambient
Diameter at 35oC of
temp, under
of wires (Maximum) lnsulation sheath
plaster

Ohm/km mm mm mm Kg/Km amps

mm2 No/mm

0.4 0.8 4.4 x 12.0 70 17

2x1.5 re 1 / 1.38 12.5926
0.5 0.9 5.2 x 13.5 103 23
2x2.5 re 1 I 1.78 7.5555
0.6 0.9 6.0 x 15.5 146 31
2x4.0 re 1 12.26 4.7302

Three core

I / 1.38 4.4 x 19.0

3x1.5 re

3x2.5 re 1 I 1.78 5.2x21.5

6.0 x 25.0
3x4.0 re 1 12.26

* Current ratings are valid for the cables laid under normal conditions as detailed at page 19

14

L
 TABLE:10
300/500 Volts
Type : NYMT as per VDE 0250/3.69

Specification
f.!ar1'annealed Copper,eondu-ctor.,pVC,insufatd two,.three.or-fzur,eoie$Jafd..lJpi
filled 'and P,Yc,sheathed'a.long wittr, a gatvanised steet
rope under:the ,sh,eith,, , , . *i
Suitabte'for'use'as' suBporting,f,'€rlaf,G€b[e,forcsntinuous,permls,s.ible:,,servie€
'
voltage of 3451575'vbfts., .:, .1 ' ,,';,:,- " '
COlOUrdSheath::',Black',.t',.,'.,' |, t,... :::::'::: " :'.''',.'

Twin core
Cross No. and DC Nominal *
Nominal Maximum Approx. Current
Section approximate resista nce thickness thickness outer Weight rating at
Diameter at 35iC of of diameter JCL
of wires (Maximum) lnsulation sheath ambient
temp in air
Copper wires Steel wires
mm2 No/mm No/mm Ohm/km mm mm mm kg/km amps
2x1.5 re 1 t1.38 19 / 0.6 12.8042 0.6 1.4 9.8 206 17
2x2.5 re 1 I 1.78 19 / 0 6 i.7036 0.7 1.4 11.0 ,1
251
2x4.0 re 1 t2.26 19 / 0.6 4.8254 0.8 1.4 tt.3 330 31
2x6.0 re 1 12.77 '19
/ 0.6 3.2063 0"8 1.4 13.5 404 41

Three core
3x 1.5 re
3x2.5 re
3x4.0 re
3x6.0 re

4 x '1.5 re
4 x2.5 re
4x4.0 re
4x6.0 re

*
Current ratings are valid for the cables Iaid under normal conditions
as detailed at page 19

15
CURRENT CARRYING GAPACITY OF CABLES MADE ACCORDING TO VDE 0250/3.69

1. General
For a Pvc insulated cable, made as per VDE 0250/3.69, the maximum permissible continuous
conductor temperature is 700C. The current carrying capacity of given cable installed in air,
depends on the maximum permissible conductor temperature, ambient temperature, viscinity
of other cables and also of other materials which may cause hindrance to normal heat
dissipation from the cable surface.

2. NormalGonditions
The basis of Current rating of cables in tables 11, 12 & 13 has been chosen for normal
ambient air temperature of our country of 350C and for normal laying conditions as follows:

A. Cable in conduit:
i) One or more single core cables installed in conduit.

B. Cable in air:
i) Single core cable installed free in air with a maximum clearance equal to one diameter
between cables and also single core wiring switchgear, distribution gears and bus bar
distribution sYstems.
ii) Multicore cables or wires installed free in air.

3. Deviated Conditions
lf the actual conditions of cable installation are not same as normal conditions, the current
rating values given in tables 11, 12 & 13 are to be multiplied with the rating factors as
described below

Variation of Ambient TemPerature

When the ambient temperature is under on over 350C the current carrying capacity of cables as
shown in tables 11, 12 & 13 is increased or decreased by a factor according to the following table:

TABLE:11
Rating Factors for Variation of Ambient Temperature

10 '15 20 .E
30 35 40 45 50 55 60
Ambient TemPeratureoC
1.31 1.25 1.19 1.14 1.07 1.00 0.93 0.85 0.76 0.66 0.53
Rating Factor

Grouping of Gables
When several wires or cables are grouped together their current carrying capacity is reduced.
Some forms of groupings have already been considered under normal conditions of installing the
cables. For other formJof grouping, the current carrying capacity of the cables would be reduced
by factors that can be taken from tables 27 and 28.

16
TABLES ON CONSTRUCTION, WEIGHT, & NORMAL CURRENT RATING OF WIRES
AND CABLES MADE AS PER VDE 0271 & BDS 901

TABLE:12
600/1000 Volts
Type:NYYas pervDE 0271t3.69 & BDS g01:2010, BDS tEC 60502 (part-1)

eontinuous

Single Core
* Current rating
Cross No. and D.C Nominal Nominal Approx. Approx.
Section approximate resistance thickness thickness outer Weight 30oc 350C
Diameter at 30oC of of diameter ambient ambient
of wires (Maximum) temp.
lnsulation Sheath temp.
under-
ground in air

mm2 No/mm ohm/km mm mm mm kg/km amps amps

1x1.5 re 'l / 1.38 12.3700 0.8 1.8 6.6 bU 27
'1 22
x 1.5 rm 7 / 0.56 12.3700 0.8 1.8 6.9 66 27 22
1x2.5 re 111.78 7.4220 0.9 '1.8
7.2 36 30
1x2.5 rm 7 I 0.67 7.4220 0.9 1.8 7.5 82 36 30
1x4 rm 7 / 0.85 4 6465 1.0 1.8 8,2 106 47 39
1x6 rm 7 t1.05 3 0873 1.0 1.8 8,7 132 59 50
1x10 rm 7 I 1.35 1 8399 1.0 1.8 9.7 182 7B 69
'1
x16 rm 7 I 1.71 1.1642 1.0 1.8 10.7 252 100 94
1x25 rm 7 12.14 0.7359 1.2 1.8 12.4 JbJ 130 125
1x35 rm 19/1.53 0 5343 1.2 1.8 13.7 470 155 160
1x50 rm 19/1.83 n 10?o 1.4 1.8 15.6 645 185 195
1x70 rm 1912.17 0 2723 1.4 '1.8
I /.J 858 225 245
1x95 rm 19 t2.52 0 1964 t.o 1.8 19.4 1129 270 300
1x120 rm 37 t2.03 0.1 559 l.b 'i.B 21.0 1384 3'10 350

17
6ffi
\@
ffim
| u#l
"i"',r.1.

TABLE: 12 Contd.
* Current rating
Cross No. and D.C. Nominal Nominal Approx. Approx.

Section approximate resistance thickness thickness outer Weight 300c 350C

ambient ambient
Diameter at 30oC of of diameter
temp. temp.
of wires (Maximum) lnsulation Sheath under-
in air
ground

mm2 No/mm ohm/km mm mm mm kg/km amps amps

'1709
1x150 rm 37 12.27 0.1 268 1.8 t.o 23.1 350 405
1x185 rm 37 12.52 0.1 01 0 2.0 2.0 25.6 2097 390 460
1x240 rn 61 12.24 0.0769 2.2 2.0 28.6 2708 450 555
1x300 rm 61 t2.50 0.0613 2.4 2.0 31.3 3405 515 640

1x400 rm 61 12.89 0.0479 z.o 2.2 35.3 4408 585 770

1 x500 rm 61 t3.23 0.0380 3.0 2.2 3V.t 5436 680 900
1 x630 rm 127 t2.52 0.0294 3,0 2.2 43.2 6802 800 1 030
1x800 rm 127 t2.85 0.0232 3.0 2.6 48.25 8679 1 030 1189
1 x 1000 rm 127 t3.20 0.0186 3.0 2.6 52.80 10728 1154 1 335

Twin core
2x1.5 re '1 / 1.38 12.5779 0.8 '1.8 11.1 172 25 19
2x1.5 rm 7 / 0.56 12.5779 0.8 1.8 11.8 191 25 19
2x2.5 re 1 I 1.78 7.5675 0,9 1.8 12.4 222 3+ 27
2x2.5 rm 7 10.67 7.5675 0.9 1.8 12.98 239 34 27
2x4.0 rm 7 / 0.85 4.7401 1.0 1.8 14.3 308 44 35
2x6.0 rm 7 t1.05 3.1 496 1.0 1.8 15.5 382 55 45

2x 10.0 rm 7 t1.35 1.8814 1.0 1.8 17.3 517 t4 62

2 16.0
x rm 7 I 1.71 850
1 .1 1.0 t.6 19.5 707 97 B4
2x25.0 rm 7 t2.14 0.7505 1.2 1.8 t3.o 1003 125 110
2 x 35,0 rm 19 / '1
.53 0.5446 1.2 2.0 26.5 1382 150 140

Three core
'16
3x1.5 re 1t1.38 12.5779 0.8 1.8 11 .6 200 22
3x1.5 rm 7 / 0.56 12.5779 0.8 1.8 12.3 216 22 16
3x2.5 re 1 I 1.78 7.5675 0.9 1.8 12.9 266 30 23
3x2.5 rm 7 t0.67 7.5675 0.9 1.9 tJ.o 275 30 IJ
3x4.0 rm 7 / 0.85 4.7401 1.0 1,8 15.0 369 38 32

3x6.0 rm 7 I 1.05 3.1 496 1.0 1.8 16.3 465 48 41

'1.8 641 64 56
3 x 10.0 rm 7 11.35 1 .8814 1.0 18.3
3 x 16.0 rm 7 I 1.71 1 .1 850 1.0 1.8 21.4 940 83 75
1a-7 A
3 x 25.0 rm 7 12.14 0.7505 1.2 2.0 25.4 tJla 110 98

20 - wrre 0.5446 1.2 1,8 23.2

,t ?ro 130 120
3 x 35.0 rm
3 x 50.0 rm 20 - wire 0,4022 1,4 2.0 27.1 1811 155 150
3 x 70.0 rm 20 - wire 0.2785 1.4 2.0 30.0 2468 190 190
3 x 95.0 rm 20 - wire 0.2006 1.6 2.0 34.5 331 8 225 230

18
 TABLE: 12 Contd.

* Current rating
Cross No. and D.C Nominal Nominal Approx. Approx.
Section approximate resistance thickness thickness outer Weight 300c 350C
Diameter at 30oC of of diameter ambient ambient
of wires (Maximum) temp.
lnsulation Sheath temp.
under-
in air
ground
mm2 No/mm ohm/km mm mm mm kg/km amps amps
3x120 sm 39 - wire 0,1 590 '1.6
2.2 37.2 409't 260 270
3x150 sm 39 - wire 0.1 288 1.8 2.2 41.1 5056 295 305
3x185 sm 39 - wire 0.1 030 2.0 2.2 45.3 6162 330 350
3x240 sm 39 - wire 0.0783 2.2 2.6 50.9 7997 385 410
3x300 sm 39 - wire 0.0624 2.4 2.6 57.3 0059 425
1 470

Three and Half Core

2x25rml16rm 7 t2.14 0.7505 1.2 26.7 587
1 110 9B
7 I 1.71 1 .1 850 1.0
3x35sm/16rm 20 - wire 0.5446 1.2 25.4 1592 130 120
7 I 1.71 1.1850 1.0

3x50sm/25rm 20 - wire 0.4022 1.4 2.0 29.3 2213 155 150

7 12.14 0.7505 1.2
3x70sm/35rm 20 - wire 0.2785 1.4 2.0 32.4 2937 190 190
19/1.53 0.5446 1.2

3x95sm/50rm 20 - wire 0.2006 1.6 2.2 38.3 3969 225 230

19 I 1.83 0.4022 1.4
3x120sm/70rm 39 - wire 0.1 590 1.6 2.2 40.4 4958 260 270
19 t2.17 0.2785 1.4

3 x 150 sm / 70 rm 39 - wire 0. 1 288 1.8 45.4 6021 295 305

19 t2.17 0.2785 1.4
3x1B5sm/95rm 39 - wire 0.1 030 2.0 5'1.1 7486 330 350
19 t2.52 0.2006 t.o

3x240snl120rn 39 - wire 0.0783 2.2 9705 385 410

37 t2.03 0.'l 590 1,6
3x300sm/150rm 39 - wire 0.0624 2.4 12101 425 470
37 t2.27 0.1 288 1,8

19
663
wv
TABLE: 12 Contd.

# J
t

t/
1

- Current rating
Cross No. and D,C. Nominal Nominal Approx. Approx.

Section approximate resistance thickness thickness outer Weight 300c 350C

ambient ambient
Diameter at 30oC of of diameter
temp. temp.
of wires (Maximum) lnsulation Sheath under-
in air
ground

mm2 Noimm ohm/km mm mm mm kg/km amps amps

Four core
4x1.5 re 1 / 1.38 12.5779 0.8 1.8 12.4 231 22 16

4x1.5 rm 7 / 0.56 12.5779 0.8 1.8 13.15 252 22 16

30 cL
4 x2.5 re I I 1.78 7.5675 0.9 1,8 13.8 307
4x2.5 rm 7 10.67 7.5675 0.9 1.8 14.4 315 30 23
4.7401 '1.0 1.8 16.2 441 38 32
4 x4.0 rm 7 / 0.85
4x6.0 rm 7 t1.05 3.1 496 1.0 1.8 17.6 560 48 41

'19,8 /oJ 64 56
4 x 10.0 rm 7 11.35 1.8814 1.0 1.8
o2 7E,
4 x 16.0 rm 7 I 1.71 1.'1850 1.0 1.8 23.2 1154
4 x25.0 rm 7 t2.14 0.7505 1.2 2.0 27.6 1 698 110 98
4 x 35.0 SM 20 - wire 0.5446 1.2 2.0 25.4 1 755 130 120

4 x 50.0 SM 20 - wire 0.0422 1.4 I,U ,o1 2460 155 '150

4 x 70.0 SM 20 - wire 0.2785 1.4 2.0 32.4 3260 190 190

4 x 95,0 SM 20 - wire 0.2006 1.6 2.2 38.3 4368 225 230

4 x 120.0 SM 39 - wire 0.1 590 1.6 2.2 40.4 5368 260 270

4 x 150.0 SM 39 - wire 0.1 288 1.8 2.6 45.4 6718 295 305

4 x 185.0 SM 39 - wire 0.1030 2.0 2.6 51.1 8267 330 350

4 x240.0 SM 39 - wire 0.0783 2.2 3.0 58.4 1 0736 385 410

39 - wire 0.0624 2.4 3.0 63.8 13417 425 471
4 x 300,0 SM

* Current ratings are valid for the cables laid under normal conditions as detailed at page 34

20
 TABLE: 13
600/1000 Volts
Type:NYY{ as perVDE02t1t3.69 & BDS 901 ;2010, BDS IEC 60502 (Part-1)

Specification
,Flain,'gnnea'l 'eopper':Con uc '',,PVe',insutatedi,mr tti laid up and,::F.V€
sheathed.,':':: " ,: :' :
"or""
For use as control'ca.bles, tt'caa be laid incto , outdoors-,,undergroufid.::and in.water
fQrcontinuou$perrr,ri*s.i:b Bervice-':vo ge,af'zzgl.12G0votts- :;.. :,1: :...::,,:::,:.:

Multicore
* Current rating
Cross No. and D,C. Nominal Nominal Approx. Approx.
Section approximate resistance thickness thickness outer Weight 300c 350C
Diameter of each core of of diameter ambient ambient
of wires temp.
at 30oC lnsulation Sheath temp.
under-
(Maximum) in air
ground
mm2 No/mm ohm/km mm mm mm kg/km amps amps
5 x '1.5 re 1 t1.38 12.5779 0.8 1.8 12.6 220 18 13
7x1.5 re 1 / 1.38 12.5779 O,B 1.8 13.5 258 16 12
10 x 1.5 re 111.38 12.5779 0.8 '1.8
16.4 35'i '13
10
12 x 1.5 re 111.38 12.5779 0.8 1.8 16.9 399 12 I
x 1.5 re
16
21 x 1.5 re
111.38 12.5779 0.8 1.8 18.5 507 11 I
24 x 1.5 re
111.38
1/ 1.38
12.5779
12.5779
0.8 1.8 20.3 635 I 7
0.8 2.0 22.4 712 0 7
30 x '1.5 re 1t1.38 12.5779 0.8 2.0 23.6 851 8 6

5x2.5 re 1 I 1.78 7.5675 0.9 1.8 14.2 299 24 19

7 x2.5 re 111.78 7.5675 0.9 1.8 15.3 360 21 U
'10 x 2.5 re
1 I 1.78 7.5675 0.9 1.8 18.8 490 18 14
12x2.5 re 1 I 1.78 7.5675 0.9 '1.8
19.4 567 16 1,)
IJ

16 x 2.5 re 1t1.78 7.5675 0.9 1.8 21.3 727 14 11

21x2.5 re 1 I 1.78 7.5675 0.9 2.0 23,5 920 1.)
IJ 10
24x2.5 re 1 I 1.78 7.5675 0.9 2.0 26.4 1 059
4a 0

30 x 2.5 re 111.78 7.5675 0.9 2.0 27.B 1274 10 8

21
TABLE: 13 Contd.
* Current ratinq
Cross No. and D.C. Nominal Nominal Approx. Approx.
** outer 300c 350C
Section approximate resistance thickness thickness Weight
ambient ambient
Diameter of each core of of diameter
temp. temp.
of wires at 30oC lnsulation Sheath
under-
in air
(Maximum) ground

mm2 No/mm ohm/km mm mm mm kg/km amps amps

5x4 rm 7 / 0.85 4.7401 1.0 1.8 '16.8 402 3'1 25

7x4 rm 7 / 0.85 4.7401 '1.0 1.8 18.2 544 27 22
10x4 rm 7 / 0.85 4.7401 1.0 1.8 22.7 708 23 19
12x4 rm 7 i 0.85 4.7 401 1.0 1.8 23.4 837 21 17
* Current rating are valid when all the cores of the cable carry current and the cable is laid
under normal conditions as detailed at page 34.
** Control cables of higher cross-sections are also manufactured on demand.
*** Control cables having any number of cores upto 169 can be manufactured on demand.

TABLE:14
600/1000 Volts
Type: NYFGbY
as per VDE 027113.69 & BDS 901 ;2010, BDS IEG 60502 (Part-l)
,$Becificati0n' ' ..
"'Fkin annealed:Copper Conduetor, PVe rinsulated,,lwo;'thr.ee:&,ht*f.cr'four cares laid:
"up"'bedded,'with..PVCor.tape,: F61wire armouring:with helieal,,steel.taping and. PVC

S.uitabje,for use in'.indoors,.outdoor$, undergrond ,and.in.'water .for continuous

permissible service voltage of.72011,200 volts,. ' ' ' ,; "'
Colourofsheath.:,Black,',' .'.' :

Two Gore
* Current rating
Cross No. and D.C Nominal Nominal Approximate Approximate
** 300c 350C
Section approximate Resistance thickness thickness outer Weight
ambient ambient
Diameter of each core of of diameter
temp.
of wires ai 20oC lnsulation Sheath
temp.
under-
in air
(maximum) ground

mm2 Noimm ohm/km mm mm mm kg/km amps amps

2x 1.5 re 1 / '1.380 12.5779 0.8 1.8 14.44 430 25 19

2x25 re I I 1.780 7.5675 0.9 1.8 15.66 500 34 27
2x4.0 rm 7 / 0.850 4.7 401 1.0 1.8 16.50 577 44 35.
2x6.0 rm 7 I 1.05 3.1 496 1.0 1.8 17.67 675 55 45

22
,@
TABLE: 14 Contd'
* Cunent rating
Nominal Nominal Approx. Approx.
l'rss Section No. and D.C
Weight 300c 350C
Resistance thickness thickness outer
approximate ambient ambient
of each core of of diameter
Diameter temp. temp.
at 20oC Sheath under-
of wires lnsulation in air
(maximum) ground

mm kg/km amps amps

ohm/km mm mm
mm2 No/mm
'19.50 846 74 62
1.8814 1.0 1.8
2x10 rm 7 / 1.350 97 84
1.0 1.8 21.66 1 091
2x16 rm 7 I 1.710 1,'1850 84
1.8 21.80 1 096 97
19 / 1 .040 850
1 .1 1.0
2x16 rm
2.0 26.'lB 1 564 125 110
7 12.140 0,7505 1.2
2x25 rm
1567 125 1'10
0.7505 1.2 2.0 26.40
2x25 rm 19 / 1 .300 150 140
1.2 2.0 28.70 1920
2x35 rm 19 / 1 .530 0.5446 167
2.0 33.30 2765 175
19 / 1 .830 0.5446 1.4
2x50 rm

Three Core . Current rating

Nominal Nominal Approx. Approx.
Cross Section No. and D.C
Weight 300c 350C
outer
approximate Resistance thickness thickness
ambient ambient
of each core of of diameter
Diameter temp. temp.
at 30oC Sheath
of wires Insulation under-
(maximum) in air
ground

mm mm kg/km amps amps

No/mm ohm/km mm
mm2
14.94 461 22 16
0.8 1.8
3x1.5 re 1 / 1.380 12.5779
0.9 1.8 16.23 556 30 ,,).
3x2.5 re 1 / 1.780 7.5675
18.33 710 38 3t
3x4 rm 7 / 0.850 4.7 401 1,0 1.8
19.60
o?tr 4B 41
3x6 rm 7 / 1.050 3.1496 1.0 1.8

21.60 051 64 56
3 x 10 rm 7 / 1.350 1.8814 1.0 1.8
t.o 23.60
1

1 360 83
-7E

3x16 rm 7 11.710 1 850

.'1 1.0
t.u 27.60 1 887 110 98
3x25 rm 7 12.140 0.7505 1.2
2.0 24.60 1 833 130 120
3x35 sm 20 - wire 0.5446 1.2

27.90 2417 155 150

2.0
3x50 sm 20 - wire 0.4022 1.4
2.0 30.70 3084 190 190
3x70 sm 20 - wire 0.2785 1.4
'1.6 2.2 36.00 4378 225 230
3x95 sm 20 - wire 0.2006
0.1590 1.6 2.2 38.60 SIZJ 260 270
3x120 sm 20 - wtre
'1.8 42.20 6345 295 305
2.2
3x150 sm 39 - wire 0.'1288
2.0 2.6 46.90 7686 330 350
3x185 sm 39 - wire 0.1 030
52.60 9964 385 410
0.0783 2.2 2.6
3x240 sm 39 - wire
2.4 3.0 58.60 12219 425 470
3x300 sm 39 - wire 0.0624
normal
* cabre carry current and the cabre is raid under
current rating are varid when a[ the cores of the
conditions as detailed at Page 34'

ZJ
 TABLE: 14 Contd.

Cross Section
* Current rating
No. and D.C Nominal Nominal Approx. Approx.
approximate Resistance thickness thickness outer 300c
Weight 350C
Diameter of each core ambient
of of diameter ambient
at 20oC temp.
of wires lnsulation Sheath temp.
(maximum) under-
ground in air

mm2 No/mm ohm/km mm mm mm kg/km amps amps

2x10 rm 7 I 1.350 1.8814 1.0 1,8 19.50 846 74 62
2x16 rm 7 I 1.710 1 .1 850 1.0 1.8 21.66 '109'1
97 84
2x16 rm 19 I 1.040 1 .1 850 1.0 1.8 21.80 1096 97 84
2x25 rm 7 t2.140 0.7505 1.2 2.0 26.18 1564 125 110
2x25 rm 19 / '1 .300 0.7505 1.2 l.u 26.40 1567 4aE
ILJ 110
2x35 rm 19 / 1.530 0.5446 1.2 )n 28.70 1920 150 140
2x50 rm 19 / 1 .830 0.5446 1.4 2.0 33.30 2765 175 167

Three Core

Cross Section

300c 350C
ambient ambient
temp.
temp.
under-
ground in air

3 x '1.5 re 'l i 1.380 12.5779 '1.8

0.8 14.94 461 '16
3x2.5 re 1t1.780 7.5675 0.9 1.8 16.23 556 23
3x4 rm 7 / 0.850 4.7401 1.0 1.8 18.33 710 '1)
3xG rm 7 t1.050 3.1496 1.0 1.8 19.60 835 41

x '10
3 rm 7 I 1.350 1.8814 '1.0
1.8 21.60 051
1 64 56
3x16 rm 7 I 1.710 .1850
'1
1.0 1.8 23.60 1 360 OJ 75
3x25 rm 7 t2.140 0 7505 1.2 2.0 27.60 1 BB7 1'10 98
3x35 SM 20 - wire 0.5446 1.2 2.0 24.60 1 833 130 120
3x50 SM 20 - wire 0.4022 1.4 2.0 27.90 2417 155 150
3x70 SM 20 - wire 0.2785 1.4 2.0 30.70 3084 190 190
3x95 SM 20 - wire 0 2006 1.6 2.2 36.00 4378 225 230
3x120 SM 20 - wire 0.1 590 1.6 2.2 38,60 5223 260 270
3 x 150 SM 39 - wire 0'1288 '1.8
2.2 42.20 6345 295 305
3 x 185 SM 39 - wire 0.1030 2.0 2.6 46.90 7686 330 350
3 x240 SM 39 - wire 0.0783 2.2 2.6 52.60 9964 385 410
3x300 SM 39 - wire 0.0624 2.4 3.0 58.60 ,14 E
12219 470
*
Current rating are valid when all the cores of the cable carry current
and the cable is laid under normal
conditions as detailed at page 34.

23
 ffim
I
I
eetrq
he.trry
l.::.gl
ftr I

TABLE: 14 Contd.

I Three and half Core

Cross No. and D.C. Nominal Nominal Approx. Approx.
* Current ratinq
** outer Weight 300c 350C
Section approximate resistance thickness thickness
ambient ambient
Diameter at 30oC of of diameter
temp. temp.
of wires (Maximum) lnsulation Sheath
under-
in air
ground

mm2 No/mm ohm/km mm mm mm kg/km amps amps

3x25rm/16rm i 7 12.14 0.7505 1.2 2.0 28.9 2143 110 98

I 7 I 1.71 1 ,'1 850 1.0
3x35sm/16rm 20 - wire 0.5446 1.2 2.0 28.4 2147 130 120
7 I 1.71 1.1850 1.0
3x50sm/25rm 20 - wire 0.4022 1.4 2.0 33.3 3113 155 150
7 12.14 0.7505 1.2
3x70sm/35rm 20 - wire 0.2785 1.4 2.2 37.1 4006 190 190

7 12.53 0.5446 1.2

3x95sm/50rm 20 - wire 0.2006 t.o 2.2 42.9 5192 225 230
19 / '1
.83 0.4022 1.4
3x120sm/70rm 39 - wire 0.1 590 1.6 2.2 45.2 6300 260 270
1912.17 0.2785 1.4
'1.8 2.6 50.4 7499 295 305
3 x 150 sm / 70 rm 39 - wire 0.1 2BB
19 12.17 0.2785 1.4
3 x 185 sm / 95 rm 39 - wire 0.1030 2.0 2.6 57.3 9536 330 350
19 12.52 0.2006 1.6
3x240sm l120rn 39 - wire 0.0783 2.2 3.0 64.6 12045 383 410
37 t2.03 0.'1590 1.6
3 x 300 sm i150 rm 39 - wire 0.0624 2.4 3.0 71.4 1 4655 425 470
37 12.27 0,1 288 1.8

24

t_
TABLE: 14 Gontd.
D.C. . Cunent rating
Cross No. and Nominal Nominal Approx. Approx.
resistance
Section approximate thickness thickness outer Weight 300c 350C
of each core
Diameter ambient ambient
at 30oC of of diameter
temp.
of wires (Maximum) lnsulation Sheath
lemP
underqround tn atr
mr# No/mm ohm/km mm mm mm kg/km amps amps

Four Core * *
4x16 rm 7 I 1.7',1 1.1850 1.0 2_0 25.9 '1630 83 75
4x25 rm 7 12.14 0.7505 1.2 2.0 29.8 2272 110 9B
4x35 sm 20 - wire 0.5446 1.2 2.0 28.4 2311 130 120
4x50 SM 20 - wire 0.4022 1.4 2.0 33.3 3375 155 150

4x70 sm 20 -wire 0.2785 1.4 2.2 37.1 431 3 190 190

4x95 sm 20 - wire 0.2006 1.6 2.2 42.9 5604 225 230
4x120 sm 39 - wire 0.1590 1.6 2.2 45.2 7600 260 270
4x150 SM 39 - wire 0.1288 1.8 2.6 50.4 8222 295 305

4x185 sm 39 - wire 0.1030 2.0 2.6 57.3 10319 330 350

4x240 sm 39 - wire 0.0783 2.2 3.0 M.6 13117 385 410
4x300 SM 39 - wire 0.0624 2.4 3.4 71.4 1 5978 425 470
*
Cunent rating are valid for the cable laid under normal conditions as detailed at page 34.
* Three and four core cables of smaller crosssection other than tabulated here are also manufactured on demand.

TABLE:15
600/1000 Volts
Type : NYFGbY-I / NYRGbY-|
as perYDEO271|3.69 & BDS 901 ;201A, BDS tEC 60502 (part-l)
Specffication
Plainannealed'CopperCondu.ctql,p{€=iaE*f#€jt
PVC ortape, Flat.f Rsund wire E*qqtii ,,
Suitahle for use, .i* indoors, .outeoc.i. ;,...u-+,.4
permissible service, voltage of 72Sl1,2S$,v.slt
Oolcui:of shmth: Blackr.' , . '-.,'.',.':....::.-:-:-,:
Multicore *
Cross No. and D.C Nominal Nominal Approx.
. Current rating
Section
* approximate Resistance thickness thickness outer
Approx.
Weight 300c 350C
Diameter of each core
of of diameter ambient ambient
at 20oc
of wires lnsulation Sheath temp.
(maximum) 1emP.
underground tn atr
mm2 No/mm ohm/km mm mm mm Kg/Km amps amps
10 x 1.5 re 1 / 1.38 12.10 0.8 1.8 18.32 u1 13 10
'|2x1.5 re 1 11.38 12.10 0.8 1.8 19.04 730 12 I
25
TABLE: 15 Contd.

* Current ratinq
Cross Section No. and D.C Nominai Nominal Approx. Approx.
approximate Resistance thickness thickness outer Weight 30oc 350C
Diameter of each core ambient ambient
of of diameter
at 20oC temp. temp.
of wires lnsulation Sheath
(maximum) under-
in air
ground

mm2 No/mm ohm/km mm mm mm kg/km Amps Amps

14 x 1.5 re 1t1.38 12.10 0.8 1.8 19.54 764 12 I

'16 x 1.5 re 1t1.38 12.10 0.8 1.8 20.40 843 11 8
20 x 1.5 re 1t1.38 12.10 0.8 '1.8 21.70 993 0 7
27 x1.5 re 1 / 1.38 12.10 0.8 2.0 25.18 1236 I 7

7 x2.5 re I I 1.78 7.28 0.9 1,8 17.14 632 21 17

12x2.5 re I 1.78 7.28 '13
1 0.9 1.8 21.29 925 16
19 x 2.5 re 1I 1.78 7.28 0.9 2.0 24.70 1261 13 10
27 x2.5 re 1I 1.78 7.28 0.9 2.0 28.85 '1658 11 8
37 x2.5 re 1I 1.78 7.28 0.9 2.0 32.66 2327 10 7

5x1.5 rm 7 / 0.56 12.10 0.8 1.8 16.50 519 1B 13

.to '17,50
7 x1.5 rm 7 t0.56 12.10 0.8 l.u 606 16 12
10x 1.5 rm 7 / 0.56 12.10 0.8 1.8 20.60 776 13 10
12x1,5 rm 7 / 0.56 12.10 0.8 1.8 21.30 833 12 I
16x1,5 rm 7 t0.56 12.10 0.8 '1.8 23.10 978 11 8
21x1.5 rm 7 / 0.56 12.10 0.8 2.0 25.30 1194 I 7

5x2,5 rm 7 7.28 '1.8

10.67 0.9 18.'10 630 24 19
7 x2.5 rm 7 t0.67 7.28 0.9 '1.8 19,10 742 21 17
10 x2.5 rm 7 10.67 7.28 0.9 1.8 23.14 987 18 14
12x2.5 rm 7 10.67 7.28 0.9 2.0 24.20 1108 16 13
16x2.5 rm 7 10.67 7.28 0.9 2.0 26.20 1290 14 11

21x2.5 rm 7 10.67 7.28 0.9 2.0 28.20 1 555 13 10

12x4.0 rm 7 i 0.85 4.56 1.0 2.0 26.70 '1360 21 l

* Current rating are valid when all the cores of the cable carry
current and the cable is laid under normal
conditions as detailed at page 34.
**
Control cables of higher cross-sections are also manufactured on demand.
***
Control cables having any number of cores upto 169 can be manufactured on demand.

26
 TABLE:16
600/1000 Volts
Type : NYCY as per vDE 027113.09 & BDS 901 ;2o1ro, BDS tEC 60502 (part-1)

I
,$pecificatieq: :.:.:, r
I 'FlairrEntre=Aled.'eoppg ,fotldi1ct 'rP.V ins,utra.tbd;,'th ,lai+.Up;,'concentric
neu,,t .or.pr.ote .conducicr:of:anniialed c-cLppef gc,,regning ove1,.qql1rmon,covei!ry
of cores and PVC sheathed.
S*itahile,'f6r-,{l$e'inj:ihdoor:5,:.outd,oor,s,,.under0i6nd..an* , ater,,for:6ntinuous

Three and half Core (half core as concentric conductor)

Cross No. and DC. Nominal Nominal Approx. Approx.

* Current rating
Section approximate Resistance thickness thickness outer Weight 300c 350C
Diameter of each core
of of diameter ambient ambient
at 30oC
of wires Insulation Sheath temp. temp.
(Maximum) underground in air
mm2 No/mm ohm/km mm mm mm kg/km amps amps
3x25rm/'l6c 7 12.14 0.7505 1.2 2.0 27.6 560 ta
1 98
80 / 0.5 1 .1 850
3x35sm/16c 20 - wire 0,5446 1.2 2.0 24.1 545 130
1 12A
80 / 0.5 1 .1 850

27
 ffi
TABLE: 16 Contd.

Cross Section D.C.

resistance 300c 350C
ofeach core ambient ambient
at 30oC temp.
temp.
(Maximum) under-
ground in air

3x 50 sm/2ft 20 -wire 0_4022 1.4 2146

50 / 0.8 0.7505
3x 70 sm/3ft 20 - wire 0.2785 1_4 2855
70 / 0.8 0.5446

3 x 95 sm /50c 20 - wire 0.2006 1.6 36.0 3886

59 / 1.05 0.4022
3x120sm/70c 39 - wire 0.1590 1.6 38.6 4ffi2
71t1.13 0.2785

3x150sml70c 39 - wire 0.1288 1.8 42_6

71 t1.13 0.2785
3x185sm/Sc 39 - wire 0.1030 2.0 47.6
67/ 1.35 0.2006

3 x 2'10 sm / 120c 39 - wire 0.0783 2.2 52_6 $n

67/ 1.53 0.1590
3 x 300 sm / 150c 39 - wire 0.ffi24 2.4 58.4 11101
80 / 1.56 0.1288

*
Cunent ratings are valid for cable laid under normal conditions as detailed at page 34.

28
 TABLE: 17
3500/6000 Volts
Type : NYSY as per VDE 0271/3.69 & BDS 901 ;2010, BDS tEC 60502 (part-2)
*---\
/-\

Specification
'P{ai*.anneited'Copper:'Conductor,'PYG'insulali .three'co1:es
ffiup;Cospei shield
over common coVering of cores and pVC sheathed.
Sui! e r'u'se'.in indoorg,, outdoors;"undei un'd',6g6''i4'17y6f 'eontinuous
permissible serviCevoltageof:,4200lIZS0,vOlt$; :::,;. ;' ;,'': , ::: :: :
-,: : : '
Colour of sheath : Red
Three Gore
No. and D.C.
approximate Resistance
300c
Diameter of each core
ambient
at 3OoC
of wires temp.
(Maximum)
underground

3x16 rm 7 11.71 1 .1 850 3.4 JJ. 17 15

I 82 80
3x25 rm 7 t2.14 0.7505 J.4 36.2 2184 '105
105
3x35 rm 19 t 1.53 0.5446 3.4 38.9 2635 125 125
3x50 rm 19 / 1.83 0.4022 3.4 42.2 3286 145 155

3x70 rm 19 t2.17 0.2785 3.4 2.6 47.2 4287 180 190

3x95 rm 19 t2.52 0.2006 3.4 LO 51.0 5278 215 t35
3x120 rm 37 t2.03 0.1 590 3.4 2.6 54.9 6326 245 270
3 x 150 rm 37 t2.27 0.1288 3.4 J.U 59.3 7598 275 305

3x185 rm 37 t2s2 0.1 030 3.4 3.0 63.1 891 0 305 350
3x240 rm 61 t2.24 0.0783 3.4 3.4 69.7 11249 350 405
3x300 rm 61 t2.50 0.0624 3.4 3.4 74.8 13446 390 460

*
Current rating are valid for cable laid under normal conditions as detailed
at page 34.

29
 TABLE:18
6350/11000 Volts
ype : NYSEYFGbY as per VDE 027113.69 BDS 901 ;2010, BDS IEC 60502 Qart-2)

r.
$peeification'.,,', -
Plain:annealed,Copger Conductoq.FVe:insutated,.filed, limiting eonduet[ng'laye av+'each
'eonductor and
eaeh core]nsuliation,.concentric.shieldd.copper ov,er individual.cores,,three
cores,'laid'up.PVC,bedded,.FIat wire'arnourjrio'*fth,helical steel taping and.PVC sheathed..
$uitable'toL use :in indoors, outdoors;'underground rand in.' water,for eontinusus
permissible service voltage:of,7000/1.2000 volt$,' : :.: '.::' :

Colsur of sheath :.R.ed

Three Core

Cross No. and D.C Nominal Nominal Approx. Approx.

- Current rating
Section approximate Resistance thickness thickness outer Weight 300c 350C
Diameter of each core
of of diameter ambient ambient
at 30oC
of wires lnsulation Sheath temp. te*p
(Maximum) underground tn atr
mm2 No/mm ohm/km mm mm mm kgikm amps amps
3 x 16 rm 7 t|.71 1 .1 850 4.0 2.6 49.0 4362 79 79
3 x25 rm 7I 214 0 7505 4.0 2.6 52,0 5003 100 '100
3x35 rm 19/1.53 0 5446 4.0 2.6 550 57 16 120 120
3x50 rm 19/183 0 4022 4.0 3.0 590 6690 140 t4c
3x70 rm 19 t2.17 4.2785 4.0 3.0 63.0 7800 170 '180

3x95 rm 19 t2.52 0 2006 4.0 3.0 67.0 9231 200 220

3x120 rm 37 12.03 0.1 590 4.0 3.4 72.0 1 0557 230 250
3 x 150 rm 37 12.27 0 1288 4.0 J.4 76.0 12021 260 290
3 x 185 rm 37 12.52 0.1 030 4.0 38 81.0 1 388B 290 325
*
Current ratings are valid for cable laid under normal conditions as detailed at page 34.

30
 CURRENT CARRYING CAPACITY OF CABLES MADE ACCORDING TO VDE 0271 I 3.69
& BDS 901 :2010

1. Genaral
The current carrying capacity of a cable depends on the maxuimum permissible conductor
temperature, theremal resistancy of the materials from the conductor to the outer sheath
surface and the ambient conditions which affect the dissipation of heat from the cable surface.
At no point of the cable the maximum conductor temperature (ambient temperature +
temperature rise caused by the loading current) is permitted to exceed :

700 C - for PVC insulated cables with E/Eo upto 6/3.5 kV

650 C - for PVC insulated cables with E/Eo upto 10/5.g kV
For a given cable design the inner thermal resistance of the materials between conductor and
cable surface is definite and constant, On the contrary, the external thermal resistance
surrounding the cable along its way, hence, the external dissipation is dependent on several
variable factors as follows:

a) Thermal resistivity of the soil which depends on the nature of the soil and moisture content.
b) The variatlon of thermal resistivity along the cable path for different earth conditions, such
as,
filled up earth, trenches etc.
c) The increase of thermal resistivity by the drying of the soil due to continuous full loading
of the
cable and due to grouping of cables.
d) Reduced heat dissipation owing to air pockets which may be enclosed under protective covers,
in channels, in pipes or in ducts.
e) Heating of cable due to grouping of cables, proximity of heating pipes or direct sunrays.
f) Smaller heat dissipation of cables installed free in air.

In order to determine correctly the above conditions the correct measurement of thermal
resistivity of earth or air and the ambient termperature along the cable path are to
be
determined for one complete cycle of the seasons of a year.

2. Normal Gonditions
The basis of the current ratings (in tables 15 to 20) has been so chosen that they, without
considering any multiplication factor, are suitable for cables laid in our country under
the
I following normal conditions :

A. Cables in Ground :
i) Temperature of the soil at the depth of laying 300 C
=
ii) Depth of laying = 70 cm.
iii) Cable way is covered with layers of sand and brick.
iv) Thermal resistivity of the soil at continuous full loading of the cable
= 1200C. cm/W.

31
v) One single core d. c. cable installed separately, or, one multicore cable installed separately, or,
three single core cables in three phase system installed in flat formation with clearance of 7 cm, or
in trefoilformation, touching each other.
vi) The cable way is through a pipe of length not more than 6 meters.

B. Cable in Air:
i) Ambient air temperature = 350 C
ii) One single core d. c. cable installed separately free in air, or, one multicore cable installed
separately free in air, or, one three phase system, comprising three single core cables, installed
separately free in air in flat formation with a clearance of one diameter between individual
single-core cables or in trefoil formation each individual single-core cable being in touch with
each other.
iii) One single core d. c. cable, one multicore cable or one three phase system of three single-core
cables installed free in air with minimum clearance of -
a) 2 cm from floor, wal or roof of the room,
b) twich the cable diameter between two cables and four times the cable diameter between two
systems.
c)30 cm vertically between layers installed one above the other.
iv) Cable is protected against radiation of heat from sun or any other source.

3. Deviated Conditions
It the actual conditions of cable laying are not same as normal conditions, the current rating
value of cables shown in the Tables 15 to 20 are to be multiplied with rating factors given in the
following tables :

Variation of Thermal Resistivity of Soil

TABLE: 19

Factors for variation of Specific Thermal Resistivity of Soil for Cables made as per VDE
027113.69

Specific tfiermal resitivity

of soil. in uC. cmM.
70 100 120 150 200 250 300

Cross-sectional area of FactorA

conductors in mm2
upto 25 1.18 1,07 1 0.93 0.83 0.77 0.77

from 35 upto 95 1.22 1.08 1 0.93 0.82 0.75 0.69

from 120 upto 240 1.23 108 1 0.92 0.82 0.74 0.68

from 300 upto 500 1.25 1.09 1 0.93 0.82 0.74 0.69

32
 ,dR\
w
TABLE: 20

Specrirc
of soil. in uC. cmA// 70 100 120 150 200 250 300
rype re r |/\t FactorA
t 3 and 4 Core cable 1 t0.6 1 1 1
Twin Core cable
1 1 1 I
t0.6
Dtnget core D.C.
1
l loA
0.97 0.99 1 1 1.01 1.01 I t.oz
3 core cable with o/J.c
0.97 0.99 1 1 1J1 1.01 I t.oz
each core shielded
- 10 / 5.8 0.96 0.99 1.01
1 1.02 1.03 1.04
3 unarmoured 1 t0.6
-
single core cable
6/3.5 1.01
-
1 1 0.98 0.97 0.97 0.96
'10 / 5.8
ForvariationofSpecific-ThermaI.ResistivityofSoiIfrom12oC,.,ffi
in Tables 15 to 20 are be mutiplieJ ov drtn the factor n
J9
(Type and voltage)to obtain tne aftuai ,jting.
1.r#-r..tionat area) and factor B

Variation of Ambient temperature

TABLE:21
Rating Factors for Variation of Ambient
remperature for cabres raid Free in
Air
Ambient Temperature oC
25 30 35 40
Cable with Eo 0.6 & 3.5 kV
r.lJ 1.06 1.00
Cable with Eo 5.8 kV
0.93
1.15 1.08 't.00 0.9'l
TABLE:22
Factors for Variation of Ambient
remperature for cabres raid Underground
I Ambient Temperature oC
15 20 25 30 JC 40
fCable with E/Eo upto 6/3.5 kV
1.18 1.12 1.07 1.00 0.95 0.87
I Cable with E/Eo i015.8 kV
-
Groupinq
ng tn
in the C.r.,d-
ttre Ground
1.19 1.14 1.07 '1.00 0.93 0.85

TABLE :23
d Single_corfe D.C. Cables tn
in the G round
Number of cables
in the trench 2 J 4 5 6 8 10
a-hl^^
vcJ sr l^:) ):--- t

-- d u urreci In tne Ground in

fiat forrat on, clearance 7 cm
0.85 0.75
- (thickness oi a brick) between cables 0.68 0.64 0.60 0.56 0.53

33
W
^itrlh.

TABLE :24
Group Rating Factors for Single-core Cables in Three-phase System in the Ground

Number of system in the trench 2 J 4

Cables laid direct in the Ground in flat formation,
clearance 7 cm between systems and also between 0.82 0.74 0.68
individual cables in each system
Cables laid direct in the ground in trefoilformation, 0.85 0.77 0.72
touching each other, clearance 25 cm between systems

Grouping in Air

TABLE :25
*
Group Rating Factors for Multicore Cables or Single-core D.C. Cables in air

Clearance one diameter

between adjacent cables Cables touching each other
Arrangement of Cables
and distance from the & in contact with the wall
wall notless that 2 cm
Number of adjacently o
1 2 J 6 9 1 2 3 6
laid cables
Cables laid on ground
0.95 0.90 O.BB 0.85 0.84 0.90 0,84 0.80 0.75 0.73
in flat information
Number
of
troughs

Cables laid I 0.95 0.90 0.88 0.85 0.84 0.90 0.84 0.80 0.75 0.73
on troughs (air 2 0.90 0.85 0.83 0.8't 0.80 0.95 0.80 0.76 0.71 0.69
circulation restricted) 3 0.88 0.83 0.81 0.79 0.78 0.95 0.78 0.74 0.70 0.68
in flat formation b 0.86 0.81 0.79 0.77 0.76 0.95 0.76 0.72 0.68 0.66
Number
of
rakcs

Cables laid 1 1.00 0.98 0.96 0.93 0.92 0.95 0.84 0.80 0.75 0.73
on rakcs in 2 1.00 0.95 0.93 0.90 0.89 0.95 0.80 0.78 0.71 0.69
flat formation 3 1.00 0.94 0.92 0.89 0.99 0.95 0.78 0.77 0.70 0.68
6 1.00 0.93 0.90 0.78 0.86 0.95 0.76 0.72 0.68 0.66

1 2 6 I 1 2 3 b 9

Cables arranged
vertically on 1 0.93 0.90 0.87 0.86 0.95 0.78 0.73 0.68 0.66
structures or on wall
* These factors are valid only when the ambient temperature is not increased appreciably by the heat
generated by the loaded cables.
**
The vertical distance from one trough or rack to another is 30 cm.

34
 :@.
<.a,/

Grouping in Air (Contd.)

TABLE :26
Group Rating Factors * for single-core cables in Three-phase systems in air

Clearance one diameter Cables in trefoiI formation

between adjacent cables clearance 2 x diameter
Arrangement of Cables and adjacent systems & between systems and
distance from the wall distance from the wall
not less that 2 cm not less that 2 cm.
Number of adjacently
laid systems I 2 3 1 2 3
Cables laid on ground
in flat information 0.92 0.89 O.BB 0.95 0.90 O.BB

Number of
troughs

Cables laid on I 0.92 0.89 O.BB 0.95 0.90 0.88

troughs (air circulation 2 0.87 0,84 0.83 0.90 0.85 0,83
restricted) in
0.84 0.82 0.81 0.88 0.83 0.81
flat formation
6 0.82 0.80 0.79 0.86 0.81 0.79
Number of
rakcs

I 1.00 0.97 0.96 1.00 0.98 0.96

Cables laid
2 0.97 0.94 0.93 1.00 0.95 0.93
on rakcs in
flat formation 0.96 0.93 0.92 1.00 0.94 0.92
6 0.94 0.91 0.90 1.00 0.93 0.90

Number of cables laid

one above another 1 2 3

Cables arranged
vertically on structures 0.94 0.9't 0.89
or on walls
Cables arranged
vertically on structures 0.89 0.86 0.84
or on walls touching them

* These factors are valid only when the ambient temperature is not increased appreciably by the heat
generated by the loaded cables.
**
The vertical distance from one trough or rack to another is 30 cm.

35
Cables under Protective Covers

TABLE :27
Rating Factors for Cables in Ground under protective Covers

Cables laid direct in

Condition Cables laid direct in the ground the ground, covered
of and covered with protective with protective covers
Laying covers for cables & the space between
cable and cover well filled
with sand
Rating factors 0.80 0.90

Cables in Trench, Pipes and Pipe Blocks

ln these cases the current rating factors may vary very widely. The permissible values of rating
factors for individual cases are to be determined separately by special arrangements.

An example to calculate Current Rating at Deviated Conditions

Three cables of the type NW4 x g5 sm, 600/1000 v. laid direct in the ground at 70 cm depth
and covered with protective covers, clearance 7 cm between cables, thermal resistivity of the
soil at continuous load 1000C cmAtV and the ambient temperature in ground 250C. To hnd the
actual permissible current carrying capacity of the cables.

Current r:ating of the cable in the ground under = 230 amp

normal conditions according to Table 15
Rating factors :
For grouping of three cables according to Table 25 = 0.7S
For cables under protective cover, accordlng to Table 29 = 0.g
For lower thermal resistivity of soil, according loTable22 = 1.0g x 1
For lower ambient temperature, according toTable 24 = 1.07

Therefore, the permissible current rating of each of the three cables

= 230 x0.75 x 0.8 x 1.08 x 1 x 1.07 = 159 amp

36
 TABLE:28
600/1000 Volts
Type : Service Drop Gables

I
Specification
t
PVC':insulated.'cores,'stranded serviee eabhwith'Copper Conductor. The'wirei.of
f one
E

I
core shall ,be hard :drawn,and that d bafance.corelcores'shaH'be plain,annealed, .. ,

a) Duplex Cables

No. and approximate D. C Resistance of Nominal Current Rating

Diameter of wires each core at 20oC thickness of at 35oC
(Maximum) lnsulation ambient temp.

2.5 re I 2.5 re 1.78 I 1.78 7.280 1.60 92 80 )7

4rml4 re 7 x0.8512.26 4.560 '1.60
131 50 '1tr
4rml 4 rm 7x0.85/7x0.85 4.560 160 138.00 35
6rm/6 re 7 x1.0512.77 3.030 160 176.00 r',E
6rm/6 rm 7x1.05 17x1.05 3.030 1.60 '181.00
45
10rm/10 rm 7x135 17x1.35 1.810 160 266.00 ot
16rm/16 rm 7 x1.71i7 x1.71 1.140 t,0u 393.00 B4
25rnl25 rm 7 x2.14 7 x2.14 0,722 '1.60
589 00 110

b) Quadruplex Cables
No. and approximate D. C Resistance of Nominal Approximate Current Rating
Diameter of wires each core at 20oC thickness of Weight at 35oC
(Maximum) lnsulation ambienttemp.

3x4rm 14 re 7 x0.851 2.26 4.560 t.ou 275.00 JI

3x4rn14 rm 7x0.85/7x0.85 4.560 1.60 280.00 !L
3x4rm/6 re 7 x0.8512.77 4.560 160 290.00 JL
3x4rmi6 rm 7x085 17x1.05 4:560 '1
60 295.00
3x6rm/6 rm 7x1.05 17x1.05 3.030 1.60 370.00 +t
3x10rm/10rm 7 x1.3517 x1.35 1 .810 160 535.00 56
3x16rm/16rm 7x1.7117x1.71 1.140 1.60 792.00 75
3 x25 rm t25 rm 7x2.1417x2.14 0.722 1.60 oa
1168.00

37
TABLE:29
600 / 1000 Volts
Type: NYAB
Specification
PVC insulated plain annealed flexible Stranded Copper Conductor, Permissible Seviee
Voltage is 690 / 1150 Volts.
Colour insulation : Black

Cross No. &Approx. Thickness of Approx. Approx I C Resistance Current Rating

^r
Section dia. of wires lnsulation Outer dia wt. AIIUU
^n,^ at 35oC
(Maximum) amblent temp.
mm2 o No/mm mm mm Kg/Km ohmikm amps

1x 0.75 rm 7 0.40 0.80 2.40 12.00 24.000

1x4 rm 19 0.53 1.00 4.60 43.00 4.470 041
1x6 rm 19 0.65 1.00 5.30 75.00 2.920 052
1x10 rm 49 0.55 1.20 7.20 122.00 1.770 072
1x16 rm 49 0.63 1.20 8.40 191.00 1.120 098
1x25 rm 84 0.62 1.40 10.80 300.00 0.708 131
1x35 rm 133 0.59 1.40 12.00 396.00 0.514 167
1x50 rm 133 0.70 1.60 14.50 572.00 0.379 204
1x70 rm 189 0.70 1.60 16.50 748.00 0.262 256
1x95 rm 259 0.70 1.80 19.50 1015.00 0.189 314
1x120 rm 336 0.68 1.80 21.00 1255.00 0.1 50 366
x 150
'1 rm 392 0.70 2.00 23.50 1560.00 0.122 423

TABLE:30
200 Volts
Type:Welding Cable
Specification
Plain annealed flexible Shanded Copper Conductor Covering with PVC tape or Cotton tape
and PVC sheathed.
Colour of sheath : Black

Cross No &Approx. Thickness of Thickness of Approx. Approx. ).C, Resistance CurrentRating

Section dia of wires tape sheath Outer dia Wt at 20oC atmaximum duly
(Maximum) cycle of60%

mm2 No/mm mm mm mm Kq/Km ohm/km Amp

1x25 mm 168 x 0.44 010 2.0 12.30 326.0 0.708 169

1x35 rm 228 x 0.44 010 2.0 13.40 430.0 0.514 215
1x50 rm 323x0.44 010 2.0 15.30 575.0 0 379 lo4
1 x70 rm 456 x 0.44 010 2.2 18.00 779.0 0.262 330
1x95 rm 627 x0.44 010 2.2 19.70 935.0 0.189 405
1x120 rm 814 x 0.44 0.1 0 2.2 23.20 1297.0 0.150 473
1x185 rm 1220 x0.44 0.1 0 2.2 25.57 1941 .0 0.0972 620

38
 TABLE:31
600 / 1000 Volts
Type: NYYF
Specification
PlainAnnealed:flexibf* $tranded Coppe'f',Gonductor PVCjnsulatdd.sjn e,.tlvjn;,thrce,&'four
core..lq:iq upjfilte 'withfVe,o r.ubbq wnere.
'aRd'pVe.i-heathed; ,p6rlnl$srnla
senrim.v.o,lfu ,,i29[I20a,ivolts,'."','.,,'.
Coig{,rr sheath: ,Elaek ,, :',;:: , ,' ., : ; ; ;:':
'' .,

Single Core :

Cross No. &Approx. Thickness of Thickness of Approx. 0uter Approx. D.C. resistance Current Rating
Section dia. of wires lnsulation sheath diameter \/Vt. at 20oC at 35oC
(Maximum) ambient temp.
mm2 No/mm mm mm mm Kg/Km ohm/km amps
1x4 rm 19 / 0.53 '1.00
1.40 7.40 87.00 4.470 41
1x6 rm 19 / 0.65 1.00 1.40 8.10 116.00 2.920 52
1x10 rm 49 / 0.55 1.20 1.40 10.00 175.00 1.770 72
1x16 rm 49 / 0.65 1.20 1.40 11.20 252.00 1.120 98
1x25 rm 8410.62 1.40 1.40 13.60 375.00 0,708 131
1x35 rm 133 / 0.59 1.40 1.40 14.80 480.00
'1x50 rm '133 / 0.70 1.60 1.60 17.70 686.00
0.514
0.379
167
204
1x70 rm 189 / 0.70 1.60 '1.60 19.70 876.00 0.262 256
1x95 rm 259 t0.70 1.80 1.60 22.70 1'164.00 0.1 89 314
1x120 rm 336 / 0.68 1.80 1.80 24.60 1437.00 0.'l 50 366
1x150 rm 392 t 0.70 2.00 1.80 27.10 '1844.00
0.122 423

Three Core :

1.5 rm 7 / 0.53 0.80 1.40 1'1 .68 176.00 12.100 17

2.5 rm 7 / 0,69 0,90 1.40 11 .95 220.00 7.280 24
4rm 19 / 0.53 '1.00 1.40 13.53 269.00 4.560 33
6rm 19 / 0.65 1.00 1.60 15.44 408.00 3.030 43
10 rm 49 / 0.53 1.20 1.60 19.55 637.00 1 .810 5B
16 rm 49 / 0.65 1.20 1.60 22.94 955.00 1.440 78
25 rm 84 t0.62 1.40 1.80 28.92 1494.00 0.722 102
35 rm 133 / 0.59 1.40 1,80 31.92 1909,00 0.524 125

I Four Gore :

1.5 rm 7 / 0.53 0.80 1.40 11 .66 198.00 12.100 17

2.5 rm 7 / 0.69 0.90 1.40 13.12 266.00 7.280 24
4rm 19 / 0.53 1.00 1.60 15.31 339.00 4.560 JJ
6rm 19 / 0.65 1.00 1.60 17.00 498.00 3,030 43
10 rm 49 / 0.53 1.20 1.60 21.71 781.00 1.810 58
16 rm 49 / 0.65 1.20 '1.60 25.46 '1135.00 1.110 78
25 rm 84 t0.62 1.40 1.80 32.16 1640.00 0.722 102
35 rm '133
/ 0.59 1.40 1.80 35.52 2360.00 0.524 125
* Much
flexible stranded cables may be produced as per demand.

39
TABLE:32
ALL ALUMTNTUM STRANDED CONDUCTORS (AAC) :

As per B. S. 2'15, Part-1 & BDS 1036 : 2006

Nominal Code Name Over all Cross No. & Dia Calculated D.C Approx, Current Rat ng
Alu. dia. of Sectional of Breaking Resistance Weight
at 60cC rise at 35oC rise
Area Conductor area of each Wire Load at 20oC
over 40oC over 40oC
Conductor (Maximum)
^*t.^^i
5 Lu, amblent
(Minimum)
temo l100:C) temp (75'C)

mm2 mm mm2 No/mm Kg Ohmikm Kg/Km Amps Amps

22 MIDGE 6,18 23.33 7 12.06 407 1.2270 64 143 105

25 GNAT b.bJ 26.85 7 12.21 468 1.0660 74 157 115
35 MOSQUITO 7.77 36.88 7 t2.59 614 0.7762 101 192 140
40 LADY BIRD 8.37 42.80 7 12.79 698 0.6313 118 218 157

50 ANT 9.30 52.83 7 t3.10 845 0.5419 145 242 174

60 FLY 10.20 63.55 7 t3.40 1010 0.4505 174 273 196
70 BLUE BOTTLE '10.98 73.65 7 / 3.66 1156 0.3668 203 309 221
75 EARWIG 11.34 78.55 7 t3.78 1218 0.3645 215 312 223

80 GRASS HOPPER 11.73 84.05 7 I 3.91 1302 0.3214 230 336 239
90 CLEGG 12.51 95.60 7 I 4.17 1482 0.2825 262 365 259
'100 WASP 13.17 105.95 7 14.39 1632 0.2702 290 270 268
100 BEETLE 13.35 106.38 19 t2.67 1776 0.2539 292 393 278

n 1-7
125 BEE 14.70 132.00 7 t4.90 2033 0.2046 361 450 JI'

150 CIRCKET 16.08 157.95 7 t5.36 all1a 0.1 71 0 433 505 354
/,7
150 HORNET 16.25 157.62 19i325 tot I 0.1 825 A
491 343
175 CATERPILLAR 17.65 185,95 19 / 3 53 2919 0.1452 508 564 392

toa 414
200 CHAFER 18.90 213.22 19 13.78 3305 0.1 349 J0/ 597
-7
71
250 COCKROACH 21.10 265.75 19 t4.22 4120 0,1 082 lJt 6BB 474
300 BUTTERFLY 23.25 322.66 19 / 4.65 4971 0.08916 888 780 533
350 DRONE 25.06 372.44 37 / 3.58 5842 0.07739 1021 846 575

400 CENTIPEDE 26.46 + tx.tt 37 t3.78 6435 0.06944 1145 907 613
450 MAYBUG 28.63 486.11 37 t4.09 7528 0.05930 1341 1 003 674
500 SCORPION 29.89 529.84 3t t+.lt 8172 0.05442 1461 1 059 710
600 CICADA 32.55 628.34 37 i4.65 9678 0.04590 1732 1179 785

40
TABLE:33
ALUMIN|UM CONDUCTOR STEEL RETNFORCED (ACSR).
As per B. S. 215, Part-2 & BDS 1O3T :2A03

Corss SectionalArea No,& Dia of Wires Approx. Weight Current Rating

Nominal Code Name lalnrrlatod DC
Over all
Alu. Breaking Resistancr at 60oC rrse at 35oC ilse
dia, of
Area Conductor Aluminiun Alu Steel Alu
Load at 20oC Steel Total over 40oC over 40oC
Conductor
(Minimum) IMaximum ambrent ambient

ternp (1000C) temp (750C)

mm2 mm mm2 Noimm No/mm Kg 0hm/km Kg/Km Kg/Km (/Km (g/Km Amps Amps
20 SQUIRREL 24.48 I 20.98 I 6 t2.11 1t2.11 O,JJ 806 1 3680 58
a1
LI 85 '136
25 GOPHER 30.62 I zazt I orzso I I t.JO 7.08 980 1.0930 72 34 106 158
100

115
30 WEASEL 36.88 I sror I olzsg 1 t2.59 7.77 '11
68 0.9077 87 41 128 178 129
40 FERRET 49.48 I +zu 'l / 3.00 EE
9.00 1 550 0.6766 117 172 ttJ 155

50 RABBIT I 61.70 I u,,, 1,1,,: 1 / 3.35 10.05 1871 0.5426 145 69 214 247 178
60 MINK I zgos I oe rz I orsoo 1/366 10,98 2220 0.4546 173 82 255 477
60 SKUNK I too ro I azn ln tzss 7 t2.59 12.95
198

70 HORSE I vr.zo Iny 7 t2.79 13.95

5398
6241
0.4566
0.3936
174 290
zos l
464
538
29A
320
206
226

70 RACCOON I n,n, L,,, lul'o,,'onr 1 t4.09 12.27 2759 0.3669 ,,u I 102 319 210 226
100 CAT l rro a+ II gsoo aruqs 1t44s 13.47 3472 0.3007 zsg I 122 381 362 2s6
100 DOG I tra so I ros oo I atqtz t nstl 14.15 0.2733 zatl 107 'lo1 1oE
272
100 HARE I nzqa ro+ sa I tq.tzl 14.16 3836 0.2730 zatl 136 I 423 385 272
I

I
l,:r;;l ,,rurl
I

150 rse ro
WOLF 194.90 I 18.1 3 7057 0 1828 o*l ,r., I 726 503 350
150 DINGO 167.50 I tss zo Italsssl lrssl 16.75 3640 0.1 B1 5 506 497
aia
Jtt
175
175
LYNX
CARACAL
226.20
194.50
183 40 l tt zrsl 19.53 81 37 0.1 576 tsrl #l 842 EEN
383
184 30 t r s or I 18.05 4191 0.'1563 soz aol 587 547

lml ,,rool
I 380
I

200 PANTHER 261.50 212fil 21.00 9407 0.1 363 uuu I ,r, I 974 608 419
200 JAGUAR 222.30 210 60 1 teissoI leeal '19.30
4747 0 1367 sso I srl 671 597 413
264 42l|goleesl
l
250 BEAR 326.12 zlsesl 23.45 11360 o roos +ao I 1214 702 479
300 GOAT 400.00 324301 t nnl 25.97 1 3838 0.08912
I

I I3sl sgo I 1 489 801 543

300 BATANG 338.60 323 01 I ,il-,,1 ,,,url 24.16 7102 o.rur',0 I 890 url 1012 790 539
350 BISON I 431.20 sarsooI zreool
381 70 I 27.00 2308 o.otstz 053
1 I 1 sgo I 1443 877 593
400 ZEBRA I 484.50 428 e0 I s+ rs rs I 7/3.181
l 28.62 1 3450 o ooz+o I 1186 +ss I 1621 0,44
636
450 ELK I 588 46 477 nl gol+sol r t+nl
| 31 .50 20221 o ooosg I 1 313 anl 2t90 1027 686

450 CAMEL I 537 66 zrsesl 30.'15 4909 0.06074 1314 oru

1 I 1 800 1011 677
500 MOOSE I 597 00 ffiff1 ii,s:il 7/3.531 31.77 1 6286 0.05480 1462 s+o I 2042 1 080 721

41
TABLE:34
ALUMTNTUM CONDUCTOR STEEL REINFORCED (ACSR).
As perASTM 8232 & BDS 1037:2003

Corss Sectional Aree No ,& Dia of Wires Approx. Weight Current Rating
il^-i-^t ^alnr rlalad
Code Name DC
0ver all al 60oC rrse al 35'C rise
Alu Breaking Resistance
Aluminiun Alu Steel
dia. of Alu Stee Total over 40oC over 40oC
Conductor at 20rC
Area Load
Conducto ambrent ambrent
(Minimum) (Maximum)
temp (100rC) temp (750C)

AWG/MCIi mm2 mm2 Noimm No/mm mm Kg ohm/Km (g/Kn Kg/Km Kg/Km Amps Amps

b TURKEY 15.52 13.30 6/1.681 1 /1.68I 5.03 541 2.160 371 17 54 102 7\
4 SWAN 24.71 21.18 6t2fi1 l t2nl 6.35 847 1.350 571 28 137 101
'116
3 SWALLOW 31.14 26.69 6/2381 1/2381 7.14 1014 1.074 108 159

2 SPARROW 39.1 I 33.59 612.67 1t2671 8.03 '1290 0.854 t,l 43 IJJ 185 134
2 SPARATE 42.11 33.59 7 12.47 1/3.301 8.26 1649 0.854 e2l 67 159 186 135
I

I ROBIN 49.48 42.41 6 / 3.00 1/3001 9.00 1 589 0 676 116 I 55 171 215 155

1t0 RAVEN 62.44 53.52 6 / 3.37 1 t337 1 0.11 1 984 0 536 146 I 70 216 249 179
2t0 QUAIL 78.55 67.33 6 /3.78 1 t3.78 11.34 2400 0.426 184 I 88 272 289 206
3/0 PIGEON 99.30 85.12 614.25 I t 4.25 12.75 3000 0 337 nzl 110 342 336 2.39
4t0 PENGUIN 125.09 107.22 6l 4.77 1t477 14.31 3780 0 268 2s4l 139 433 390 275

'18 3?1
(0 430 313
266.8 WAXWING 142.48 134.98 /3.09 1 / 3.09 15.45 31 13 0.214 I 447

266.8 PARTRIDGE 156.86 134.87 26 t2.57 7 12.00 16.28 5111 0.215 3721 173 545 449 314
1',I0
300 0 OSTRICH 176.90 152.19 26 t2.73 7 12.12 17.28 5754 0.1 90 41e I 194 613 486
336.4 [/ERLIN 179.68 170.22 18 t3.47 1 13.47 17.35 3926 0.1 69 46e I 74 543 520 362
336.4 LINNET 198.38 170.55 2612.89 7 12.25 18.31 6418 0.1 70 470 217 687 523 JbJ

210.28 '170.50 30 / 2.69 t2.69 18.83 7881 0 170 471 312 783 528 366
336.4 ORIOLE 7
Eaa
397.5 CHICKADIL 212.09 200.93 1813.77 1 t3.77 18.85 4500 0.144 554 87 641 398
EEE
397.5 BRANT 227.68 20'1.56 2413.27 7 t2.18 19.61 6640 0.144 205 760 580 401
0Fa 402
397.5 IBIS 234.07 201.34 2613j4 7 t2.44 19.88 7388 0.144 554 812 582
?o7 E LARK 247.77 200.90 3012.92 7 t2.92 20.44 9229 0 145 556 370 926 585 403

E'1E 0.119 664 769 653 450

477.0 PELICAN 255.77 242.30 18 t 4.14 1 1414 20.70 105

477.0 FLICKER 272.99 241.58 24 t3.58 7 12.39 21.49 7809 0.1 20 bbb 248 914 652 448
666 1n0 975 655 450
477.0 HAWK 280.98 241.65 26 t3.44 7 12.67 21.80 BB55 0.1 20
atl a1 444 453
477.0 HEN 297.57 L+ |.Ll 30 / 3.20 7 t3.20 22.40 10772 0.120 666 1 110 661

556.5 OSPREY 298.17 282.47 181 4.47 1 I 4.47 22.35 6219 0.1 02 775 122 897 722 495

556.5 PARAKEET 318.90 282.31 2413.87 7 i258 23.22 9005 0.1 03 2BB 1 065 720 to)
556.5 DOVE 328.50 282.58 2613.72 7 i289 23.55 1 0286 0.1 03 778 360 11 38 ttJ 494
556.5 EAGLE 34i.89 282.07 30 /3.46 / i J.+0 24.21 12594 0.'103 778 518 1 296 730 497
E,l 0
605.0 PEACOCK 345.92 306.'13 24 t 4.03 7 i2.69 24.20 9778 0.0946 846 J IJ 11 59 760 utu
605.0 SQUAB 355.64 305.83 26 t3.87 7 t3.01 24.51 11030 0.0947 845 392 1237 763 519
636.0 GROSBEAK 374.70 321.90 26 t3.97 7/309 25.15 11400 0.0900 892 412 1 304 839 628

42
TABLE:35
INSULATED ALUMINIUM STRANDED CONDUCTOR. (TYPE.8. AS PER B.S. 6485)

Code Stranding Corss Weight

Diameter Minimum Nominal Calculated weight of
Name Number/ Sectional of of Bare thickness overall breaking insulated
Daimeter Area of Bare Conductor of diameter of load conductor
of wires Conductor Conductor insulation insulated (minimum)
conductor

number x mm mm kg/km mm mm mm kg kg/km

MIDGE 7 X2.06 23.32 65 6.'18 0.80 7.78 407 95
GNAT 7 X2.21 26.84 75 b.bJ 0.80 8.23 468 110
ANT 7 X 3.10 52.84 145 9.30 0.80 1'1.30 845 215
EARWIG 7 X3.78 78.58 215 11.34 0.80 13.74 1218 315
WASP 7 X4.39 106.00 290 13.17 0.80 15.17 1632 389

Other different types & sizes can also be produced as per demand.

TABLE:36
PVC COVERED ALUMINIUM CONDUCTOR STEEL REINFORCED (ACSR).
As per B. S. 6485: Type : - 1O & BDS 1037; 2003

Nomrnal Code Name Corss Sectional Arei No.& Dia of Wres 0ver all Cahulated DC Minimum Current Rating
Alu. dia. of Breaking thinknpqq at 30cC rrse
Area bare Load at 20oC
(londrrctnr Alrrminirrm of over 40oC
Aiu Steel
lonductor (Minimum) (Maximum) lnsulation ambient

temp (700C)

mm2 mm2 mm2 No/mm No/mm mm Kg 0hm/km mm mm Kg/Km Amps

25 GOPHER 30.62 26.24 6 t2.36 I t2.36 7.08 980 1.0930 16 10.70 190 103
50 RABBIT 6'1.70 52.88 6 i 3.35 1 / 3.35 10.05 1871 0.5426 14.10
1.0 330 162
100 DOG '11
8.50 105.00 614.72 7 11.57 14.15 3335 0.2733 1.6 18.20 550 256

150 WOLF 194.90 158.10 30 / 2.59 7 12.59 18.1 3 7057 0 1828 1.6 22.20 920 342
15 DINGO 167.50 158.70 18 i 3.35 4l7rE
I / J.JJ 16.75 3640 17n
0.1 81 5 t.0 20.80 680
t/c LYNX 226.20 183.40 3012.79 7 t2.79 19.53 81 37 0.1 576 16 23 60 1 050 378

175 CARACAL 194 50 184 30 1B / 3.6'1 1 / 3.61 18.05 4191 0.1 563 16 22.10 780 369
200 PANTHER 261 50 212.10 30 / 3.00 7 / 3.00 21.00 9407 0 1363 t.0 25 00 1190 418
200 JAGUAR 222.3A 210 60 '18
/ 3.86 '1
/ 3.86 19.30 4747 0.1 367 16 IJ,JU 870 404

43
TABLE:37
BARE ALUMINIUM WIRE AS PER ASTM B 230 AND ASTM B 609
REB No& Approxrmate Calculated D.C.
st. approximate Cond,;ctor Breakrng Resistance Weight
Description Item Size
No, dia. of wire da Load at 20oC
No. (Max)

No/mm. mm, Kg 0hm/Km Kg/Km

'l / 5.189 )aL '1310 57.145
1 Hard drawn Aluminium D-4 4AWG 5.189
Grounding Wire tl"1 n r

2 Annealed Aluminium 167

D-5 4 AWG 1 / 5.189 5.'189 57.145
Tie Wire (Max)

Annealed Aluminium
4AWG 1 t4.15 4.15 95-1 35 37.0
Binding Wire

TABLE:38
BARE COPPER CONDUCTOR & WIRE AS PER ASTM 83 AND ASTM 82
REB No & Approximate Calculated DC.
sl. Resistance
Description Item Size approximate Conductor Break ng Weight
No. at 20!C
No. dia, of wire dia Load (Maximum)

No/mm. n't Tn, Kg 0hm/Km Kg/Km

1 Annealed Copper D-6 6AWG I I 4.115 4.115 346 (Max) 1.377 118.219
Wire

2 Medium Hard Drawn D-7 3AWG 3 t3.37 7.239 1 070 0.670 239.594
stranded Copper Cond.

J. Medium Hard Drawn D-8 1/OAWG 7 t3.119 9.347 2155 0.338 485.141
stranded Copper Cond.

4. Medium Hard Drawn D-9 4 /O AWG 7 I 4.417 13.259 3694 0 163 953 912
stranded Copper Cond

'10.64
5. Medium Hard Drawn D-10 2/OAWG 19 12j3 2162 0.265 622.000
stranded Copper Cond.

6. Medium Hard Drawn DS-9 4/OAWG 19 / 2.68 13.41 3393 0.1 67 975.000
stranded Copper Cond.

7. Medium Hard Drawn DS-10 2/OAWG 19 t2.131 10.64 2166 0.2712 613 000
stranded Copper Cond.

Medium Hard Drawn nq_?7 350 MCN/ 37 t2.47 17.30 5662 0.101 1620.000
stranded Copper Cond.

v Medium Hard Drawn DS-38 5OO MCM 37 t2.952 20.60 10231 0 070 2297,000
stranded Copper Cond.

44
 TABLE:39
XLPE lnsulated Aluminium Cables with ACSR Messenger
& Single core Coper Cables
As per ICEA- S - 66 - 524 &ASTM B - 231.

Nomina Conduct Conductor No. &Aoorox Dia. of

Size Conductor lnsula 0ver DC Breaking
Maternls 0ver
Alu each Strand Dia.
Assembly Resistance at Cabh
tion all all Load
Area Phase Mess' (Max,)
ACSR Phase Mess- 20oC Werght
AWG thrch c0re cable
AAC el]ger
AAC ACSR MC
AAC el1ger
ness Mess.
dia dra. Phase ilqD(
ACSR Alu Steel en0er
ACSR
MC ACSR AAC qcsR
n]m2 mm2 No/mm No/mm mm mm mm * * 0hm/km Kg KS KSnft
I D-11 I DUPLEX I AAC lrcsn 6
I
1338 13 30 7 t1.56 I o,ros 1i168 I roa 504 1.U3 697 I
12.01 2110 2 1600 266 54 113

lo-tz I oupLrx I no, lrcsn I 2661 26 69 7 t2.20 I u,,u 1t2.38 7U 1 143 889 16 03 1 080
I
468
looo 1 0740 1014

l*,
213
I ounonupLrx ncsn lb t
I
I bv t2.2a 1t2.38 660 .14 1 143
7 889
lzoor lorzra 21.43 1 080 1.0140 468 1014 421
1D.14 I I

lo-rs I nnc 1t0

I I

l*. l*,* n t3t2l

QUADRUPLEX 53 52 53 52 6/337 1/337t 936 10 11 1.524 12.41 29 91 0 540 0 5350 939 1926 836
zo 4 t2l 1,,,*l al
lo
QUADRUPLEX 21 21.18 )t t t r,rl 588 b,Jb 1 143 8.11 19 69 I.JbJ 1 3500 o,u ] 84t 343
QUADRUPLEX AAC fflXr 4t0 roz o, 1i7.22 6t4.n trqrl rzol 14.31 I Xt4 oru,
*,i I 16 31 39 31 I 0 2676 roro 3818 1583
AAC b t:ial I

l3;rl
QUADRUPLEX 13 30 6/168 1/1681 o*l 504 1.143 697 16 80 ,,rl 2 1600 ,,1 ,,,
1

Ir,*l
I

I
l
^ul
I
D-161 SINGLE 3t
CORE cu(r,/HD)l 7 t337l| 7nl ,uol 10 33 10 33 06701 *,1
D-nl SINGLE CORE Cu([,lHDtl I
1/o ^^l
uiszl tntzl slol
I rszsl 12.51 1251 03381 ;i#I I
D-18 SINGLE CORE 3ufiHD)l 4nl107 41 I tranl t::el rszrl or0ll
| I
I
16 41 16.41 3694 I ;il1
I

TABLE:40
AllAluminium Alloy stranded conductors (AAAC)
; as perASTM B3g9.

SI,
Code Name
Size No. & Conductor u.t. Ultimate Conductor Current Rating
No. diameter overall resistance ^t
dt
conductor weight
of diameter at 20oC strength
Wires N/aximum) '1000c
750C

kc mil mm2 No/mm mm 0hm/Km kg kg/km amps amps

1. AMES 77.47 39.'19 7 t2.67 8.03 0.853'14 1270 108 134 '185
2 MUSA 123.30 62.44 I I J,JI 10.11 0.53500 2023 172 lc 250
3 ALL]ANCE 246.90 125.09 7 I 4.77 14.30 0.26780 3883 345 275 390
4. DARIEN 559.50 283.67 19 I 4.36 21.79 0.1 806 8528
A
1 782 457 665
GREELY 927.20 469.62 37 t4.02 '13835
28.14 0.07146 1296 622 920

45
 SELECTION OF CABLES

1. General
For proper selection of a cable, the following particulars should be known:
Power to be transferred
Number of cores
Shape of core
Conductor material
Service Voltage
Nature of current (e. 9., A. C. S0 cycle)
Nature of cable laying (e. g. laying in earth, laying in air)
Purpose of use
Length of cable

2. Selection of Cross-Section
The cross-section of a cable is dependent on three factors-allowable heating of the
conductor, allowable voltage drop and shod circuit loading capacity.
The maximum allowable heating of the cable conductors :
The maximum allowable rise of temperature of conductor as well as the corresponding
current-loading for every cross-section have been explained in previous chapiers.
The current can be determined from the following relation :

a) for D. C.
.W
r- v

b) forA. C. single phase .W

'=v cosA
W
c) forA. C. three phase 'l= Vr/3 cosZ
Where W = Power in KW
v = voltage in KV (phase to phase vortage for three phase A.c)
| - Current in ampere
cosA = Powerfactor

After calculating the current and selecting the type of cable the cross-section can be
determined by comparing the current ratings with the cross-sections given in table of
corresponding type of cable. The rating factors for deviated condition, if any, should be
considered before the determination of cross-section.

46
 3. Determination of voltage Drop :
The Voltage drop can be calculated fit m the following formulae :

I
When Current is known When power is known
t
E Direct Current (2 wire circuit) :
;
r 2.t.1
"= ffi - ).. A.V
t
(Volt) ^_2.L.W ffolt)
i

"
= ffiroo (%) e= 1oo (Y,)

Single phase A. C. (2 wire circuit) :

^ffi
^_2.1.W
"=#cosa ffoft)
)". A.V
(Volt)

"
= ffi cosa 1oo (%) s = 3.!'. W^-
).. A.V.V
16s (%)

Three phase A.C. :

L. t.{3
=
J;: coso (Volt) e -':"
- 1..L.W (Volt)
" A.v

"
=Hf cosa 1oo (%) e = , Li
1".
gi, 1oo
A.v.v
(%)

Using these formulae the cross-section can be determined from the given voltage-
drop.

Meaning of the alphabets in the above formulae :

\,/= Service Volage (Volt)
e = Voltage drop (Volt) or (%)
I = Current (Amp)
[[ = Effective Power (Watt)
ff = Conductor cross-section (mm2)
l_ = Cable tength (m)
l" = Conductivity (miohm, mm2) : for copper = 56 at 200C
for aluminium = 34 at2}oC

cosA = Power factor

47
4. The lnsulation Resistance

The insulation resistance depends on

- the dimensions of the cable (c.s.a. of conductos, thickness of insulati:,n and length of the cable),
- type and composition of the insulation (P.V.C., P.E., rubber, paper e*c.)'
- the moisture content of the insulation (especially of cables with impegmted paper insulation) and
- the temperature.
Normally the level of the insulation resistance is not a value by which the operational reliability of a
cable may be judged. Only the forced ingress of moisture may cause the insndatirn resistance to
'ts
drop to a point where a deterioration of the cable's reliability must be expected. This the reason
why the test regulations for power cables issued in the various countries do not give specific
insulation resistance values. the following table (a) and (b) shows the minimum values of newly
manufactured cables, which are exceeded by far in most cases.
The relationship between the insulation resistance and the temperature is shown in the diagram
Fig. - C for PVC cables with the basis value at 200C = 1.

It must be kept in mind that the insulation resistance values of joints and sealing ends influence
the result of insulation resistance tests, which means that the wet surface of a sealling end, for
example, may cause the values to be misleading.

Minimum lnsulation Resistance of PVC Cables

(a) Single-core PVC cables with concentric conductor or screen and multi-core PVC cables
with separately screened cores (e.9. NYCY NYSY NYHSY NYSEY)

lnsulation Resistance at 20oC

Cross-sectional Conductor against Screen or
Rated Voltage
Area of Conductors Concentric Conductor
uo/u mm' approxM Q-km
up to 4 60
up to 25 30
0.6/1kv
up to 95 20
Over 95 15

up to 50 80
3.5/6kV up to 150 50
Over 150 30

up to 50 90
up to 150 60
6.35 / 11 kV
Over 150 40

11.6120kV
to
up 70 500
Over 70 250

17.3 / 30 kV all cross-sections 500

48
 (b) Multi'core PVC cables with screen surrounding the laid-up
cores (e. g. NyCy NyFGby)
Cross-sectional
lnsulation Resistance at 20oC
Rated Voltage
Area of Conductors 1 Conductor against All Conductors
uo/u the others and the screen
mm' against the Screen
approxM Q -km approx.M Cr-km
up to 4 60 30
0.6/1kv up to 25 40 20
up to 50 30 15
Over 50 30 15

3.5/6kV
to
up 50 100 80
to
up 150 60 50
Over 150 40 30
Xs
Ratio
R,
A,o
la
I
l5
4
3

0.8

0.5
0.4
0.3

0.2

0.1
0.08

0.05
=l
0.04
0.03

0.02

0.01
0.008

0.005
0.004

0.003
ff=
.Rs
frnr
lnsulation
0.002
0.6 kv resistance at
temperature s
0.001
-10 0 t0 20 30 40 50 60 70 80oc
R, Insulation
resrstance
------> Temperalure S, at20oC

Fig. C
lnsulation Resistance of p.V,C Cables, as a Function of the Temperature
(mean Values). More or
Less Considerable Deviations may Occur, Depending on the Composition
of the p.V.C.
Compound.

49
 5. SHORT CIRGUIT
LOADING CAPACITY

The possible short circuit current

which a cable will be subject to for a
short time is dependent on the short
circuit conductor of the circuit, the
connected short circuit, the damping
apparatus e. g. Transformer, Reactor
etc. and as well as the distance of
the short circuit point from the
generating station. The short

circuit current should, therefore,

be calculated for every point of
:i:::."","""i:t"1il:" " the circuit. From this calculated
short circuit current and the
known switching-off time, the
t cross-section can be determined
I

from the diagram illustrating the

I
short circuit capacity for PVC
cables upto voltage E/Eo=10/5.8
kV and various cross-sections.
Whereas the allowable
conductor temperature for
continuous full load operation
are 70oC and 65oC for cables
upto 6kV and of 10kV
respectively, the corresponding
limiting temperatures of
conductors at short circuit are
1600C and 1550C. lt is evident
form the curve that the shorter
the switching-offtime the smaller
0.1 0.2 0.4 0.6 0.4 1 2 3 4 5 is the cross-section, the greater
Ssiching - offrime tr sec
------l- is the economy.
Permissible short-circuit current for Copper Conductors

50
 6. SOME USEFUL FORMULAS

ELEGTRICAL FORMULAS FOR DETERMINING AMPERES.

HORSEPOWER, KILOWATTS AND KILOVOLT.AMPERES

ALTERNATING CURRENT
DESIRED DIRECT
DATA Two - Phase CURRENT
Single - Phase Three - Phase
Four - Wire

Amperes when kva x 1000 kva x 1000

kva is shown
-- t zxL
kva x 1000 kva x 1000
1.73 x E E

Amperes when kwx 1000 kwx 1000

.........,.._ kw x 1000 kwx 1000
kilowatts are shown txpt ,r,Expi 1.73xExpf E

Amperes when hp x746 hp x 746 hp x 746 hp x746

horsepower is shown Ex%Effxpf Ex%Effxpf 1.73xEx%Effxpf Ex%Eff

Kilovolt-Amperes
lxE lxEx2 lx E x 1.73 IxE
1 000 1 000 000
1 000 1

Kilowatts
lxExpf IxEx2xpf lx E x 1.73 x pf lxE
1 000 000 '1000
1
1 000

lxEx%Effxpf
Horsepower
746
I xE x2 xo/o Eff
746
xpf Ix E x 1.73 x % Effx pf
746
_T
lxEx%Eff

ln three-wire, two phase circuits, the current in

E - volts ; I - amperes; o/o Etf -percent efficiency.
the common conductor is 1.41 times that in pf - power factor; kva - kilovolt ampere
e 'ther other conductor hp - horsepower; kw - kilowatts

51
TABLE :41
DIFFERENT CONDUCTOR SIZES

comparison of Gonductor sizes of different specifications

:

lmperialstandard Size : B. S. S' (old) Metric Standard size

B. S. S. (new), VDE
Nominal Area

0.98 1.0
1 I .044 0.0015
1.28 1.3
3l .029 0.0020
2.0
0.0031 1.97
3 / .036
2.98 3.0
7 I .029 0.0046

4.59 4.5
7 L036 0.0071
6.87 7.0
7 I .044 0.0106
9.59 10
7 I .052 0.0145
14.53 14.5
7 I .064 o.0225

'18.64 x
191 .044 0.0289
X
0.0404 26.03
191 .052 o
19 / .064 0.0611 39.43
49.91
o
19 1.O72 0.0774
@
19 / .083 0.1 028 66.32
0.1 506 97.19
37 I .072 e9
0.2002 129.16
37 / .083 @
0.2513 162.15
37 i "093

37 I .103 0.3083 198.90 185 @

61 /.093 0.4144 267.33 240 tr

61 /.103 0.5083 327.92 300 a

91 /.093 0.6182 398.8'1 400 0

91 /.103 0.7582 489.19 500 0

127 I .103_ 1.0582 684.71 630 0
800 0
1000 0

A Single solid wire.

+ 7-wire round strand'
x 7-wire or 19-wire round strand.
o 19-wire round or 20-wire sector shaped strand'
e 37-wire round or 39-wire sector shaped strand'
x 61-wire round or 39-wire sector shaped strand'
O 91-wire round strand.
O 127-wire round strand.
* 3 wire round strand.

52
 .@,
'--.4:/ ffim
. I smftE
rtifb.@
l.gl
| trr I

EASTERN CABLES LIMITEI)

ATA GLANCE

* Largest manufacturer of Cables & Conductors in Bangladesh producing export quality

Cable since 1971 .

.f. Machinery of German and Japan Origin.

* Modern & sophisticated manufacturing process & stringent quality control measures
ensure physical, chemical and electrical properties of lnternational Standard.

* Fully capable to manufacture any type & sizes of PVC cables having voltage upto 12 KV &
cross section upto 1000 mm2 as per VDE, BS, ASTM, JS, BDS etc.

.1. XLPE insulated LT cable / conductor are

also manufactured.

* Totally safe, reliable as well as durable.

.1. Less electricity consumption.

* Company Name / Type & size of cable is printed / embossed on each metre of its length to
ensure genuinity.

.i. Guarateed After Sales Service.

{. Wide spread Dealer / Agent network all over the country.

* Be it industry Business center or Dwelling house, only "Eastern Cables" can ensure
highest safety & longevity at lowest cost.

\,J

_l
 coNTtNUED FROM SECOND COVER)
manufacturing techniques are of
constant concern of our research and
development team. Moreover, technical
data on the latest developmenl are also
being received through visits & training
in leading cable manufacturing
enterprises of the world to ensure that
our products are always abreast of time
and technology.
PVC cables are manufactured in
Eastern Cables Ltd. mainly according to
Bangladesh Standard (BDS), Gerilan
Metric Standard (VDE), British Metric
Standard (new B.S.S) and British
lmperialStandard (old B.S.S). Bare and abroad Eastern Cables Ltd, manufactures
domestic cables following old British
lmperial Standard B.S. 2004

After fulfilling the local demand Eastern

Cables Ltd. is exporting substantial
quantity of different types and sizes of
cables to various countries of the world
including USSFl,Kuwait, U.A,E.,Singapore
etc. Easiern Cables Ltd. is also receiving
orders after competing in various
lnlernational Tenders floated within the
country and successfully executed such
orders and earned huge amount of
foreign exchange. The Programrne for
manufacturing of Crosslinked
Polyethylene (XLPE) insutated upto BS KV
cables is under execution.
lnsulated AAC and ACSR Conductors
are also manufaclured here according
to B.S. and ASTM. On demand cablei
and Conductors are also manufactured
here according to any lnternational
Standard.
Eastern Cables Ltd. at present
manufactures various lypes and sizes
of domestlc, control, flexible and power
PVC cables of continuous permissible
service voltage upto 12 KV and having
cross-sectional area upto 1000mm2
foliowing mainly the latest German
Slandards, VDE O2S0 / 9,69, VDE 0271
3.69 and B.S 6004: Moreover,
:c rqeet the demand from home and
 EASTERN CABLES LIMITED
PATENGA, CH ITTAGONG, BANGLADESH,
Telephone 88-031 -2501 291, 2501293, 2501295,
250 1 296, 250 1 297, 250 1 298
Fax B8-031-2501292
Web-site unarw. easterncables. com
E-mail info@easterncables. com

SALES & DISPLAY CENTRE

95-96, Baitul Mukarram Market, Dhaka.
Teoephone : 880-2-95526802
BSEC Bhaban (Ground Floor)
lO2Kazi Nazrul lslam Aveneu, Dhaka-1215.
Telephone : 880-2-81 20301 .
18118, Gulshan Plaza, Electric Market,
Nandankanan, Chittagong.
Telephone : 880-31-639424

rffi BANGLADESH STEEL & ENGINEERING CORPORATION

BSEC Bhaban, 102Kazi Nazrul lslam Aveneu, Dhaka-'1
Telephone : 8114616, 8112808
Telex 642225 BSEC BJ DHAKA
21 5.

Fax 880-2-8112846
E-mail bsec@bdcom.com