C A B LE S & TA B L E S B as ased ed on BS B S 7671:2001
Pa ki kista sta n Ca b le s
FOREW ORD O n the occasion of 50 50t th A nniversary of Pakistan C ables w e are pr proud to present ntthe latestand nd com om pletely revi vised ve version of “C A B LES A N D TA B LES” w hich isa handy reference forourm any frien end ds con conce cer rned w ith the installation of elec ect trica cal l eq equ uipm en ent t. T his bo booklet has a long history as it w as first publish shed ed by Pak aki istan C ab abl les in 1954 an and d thereafter it w as reg egu ularly updated an and d printed on various occasions in 1967,1970 (the M etric version),19 1985 85, ,19 1992 92 and 19 1999 99. . This latestversion includes revi visions and nd add dditions bas ased on B S 7671:2001 “R eq equ uirem en ent ts for E lectrical Installations” IEE W iring R egu gulations,Sixteent nth Ed E dition.The m ain de depa parture from previ viouspr pract ctice, e,and nd w ebe believe ve,the fact ctthatw illincreas asetheut utility U rdu trans nslation to the text xtm atter. W e w ou oul ld also like to put put on record our our ackno acknow w ledgm ent and an d gratitude to Engineer W aliJan of ofM /s.W aliJan A ssociates,in putting this together this latestedi dition ofC abl bles & Tabl bles.Itw as no not only his tech chnical alexp xpertise,butalso dedi dicat ation to the pr project ctw hich deserves pa particul ular m ent ntion. W e w ould also like to reiterate ou ourpolicy ofnotcom om prom ising on qu qual ality for w hich ou our r produ duct cts are m uch acclaim ed. W e w elcom e your yourvalued sug ugges gestion ons s forfurtherim prov ovem em ent in the pu publicat ation.
K am alA .C hinoy C hief E xecu ecut tive
FOREW ORD O n the occasion of 50 50t th A nniversary of Pakistan C ables w e are pr proud to present ntthe latestand nd com om pletely revi vised ve version of “C A B LES A N D TA B LES” w hich isa handy reference forourm any frien end ds con conce cer rned w ith the installation of elec ect trica cal l eq equ uipm en ent t. T his bo booklet has a long history as it w as first publish shed ed by Pak aki istan C ab abl les in 1954 an and d thereafter it w as reg egu ularly updated an and d printed on various occasions in 1967,1970 (the M etric version),19 1985 85, ,19 1992 92 and 19 1999 99. . This latestversion includes revi visions and nd add dditions bas ased on B S 7671:2001 “R eq equ uirem en ent ts for E lectrical Installations” IEE W iring R egu gulations,Sixteent nth Ed E dition.The m ain de depa parture from previ viouspr pract ctice, e,and nd w ebe believe ve,the fact ctthatw illincreas asetheut utility U rdu trans nslation to the text xtm atter. W e w ou oul ld also like to put put on record our our ackno acknow w ledgm ent and an d gratitude to Engineer W aliJan of ofM /s.W aliJan A ssociates,in putting this together this latestedi dition ofC abl bles & Tabl bles.Itw as no not only his tech chnical alexp xpertise,butalso dedi dicat ation to the pr project ctw hich deserves pa particul ular m ent ntion. W e w ould also like to reiterate ou ourpolicy ofnotcom om prom ising on qu qual ality for w hich ou our r produ duct cts are m uch acclaim ed. W e w elcom e your yourvalued sug ugges gestion ons s forfurtherim prov ovem em ent in the pu publicat ation.
K am alA .C hinoy C hief E xecu ecut tive
C A B L E S A N D
T A B L E S (M E T R IC ) (2007)
Pa ki kist st a n Ca b le s Limi mitt e d B /21 S .I.T.E .K A R A C H I-75 7570 700 0
Trusted notto C om prom ise
Pa kista n Ca Cab les Lim ited the coun unt try’s old esta nd m ostrep uta b le ca b le m a nu nuf fa cturer,w a s esta b lishe d 50 ye yea a rs a g o in 195 1 953 3 und u nd e r the sp o nsorship o f BIC C p Ic o f Un Uni ite d King d om a nd the C hino y fa m ily. In the sub seq ue nt fi ve d eca d es,Pa Paki ki sta n C a b l es has ha s ea rned a rep uta tion foritsel fa s a m a rket lea d erin the ind ustry a nd a s a com p a ny tha hat td oe s no not tcom p rom ise on q ua ual lity.As a result,the com p a ny has ha s g a ine ned d a p osition a s b ei ng the p rem ierca b le m a nu nuf fa cturerin the coun unt try. ,
Pakista n C a b les i Pak s a Pub l ic Lim ited C om p a ny and a nd w a s listed on the Pa Paki ki sta n Stock Exch Excha a ng e a s ea rly as as 19 1956 56, , w he hen n onl o nly 51 co com p a nies in Pak Paki sta n w ere p ub ubl li c. The com p a ny has ha s rep ea ted ly received a w a rd s from Ka Kar ra chi Stock Excha ng nge e and a nd M a na nag g em entAssoci a tion of ofPaki sta n. Pa ki Paki sta n C a b l es’m a nufa cturi ng fa ci l i ti es a nd head offi ce are l oca ted i n Ka Kar ra chion a n 11 1 1.5-a cre si te.Itpresen sent tl y em p l oysove ver r350 p eop l e.Itha s r eg i ona loffi ce i n La ho hor re and b ra nc nch h offi ce s i n Ra Raw w al pi nd i ,M ulta n,Ab bottab a d, Pes Pe sh a w a r a nd Q ue tta . The c o m p a n y’s di d istrib u tio n n e tw o rk co c o ve ver rs 35 c itie s al a ll o ve ver r Pa kista n. The com p a ny m a nu nuf fa ctures the foll ow i ng p rod uc uct ts: l l l
Electrica lW ires,C a b les a nd C ond uc uct tors Anod ized Alum inium Profiles O xygen Free C op opp p erRod
Sta rte d m a nufa c turing o f G e ne ra l W iring C a b le s w ith N a tura l Rub b e r Insula tio n.1953 Introd uc e d G e ne ra lW iring C a b les wi w ith PV PVC C insula tion fo r the firsttim e in Pa Paki ki sta n. 1960 Esta b lishe d Pow e r C a b le Fa Est Fac c to ry fo r m a nu nuf fa c ture o f Lo w Vo Vol lta g e A rm o ure d1968 C a bl es up to 3.3 KV forthe fi rstti m ei n Pa Paki ki sta n. Insta lle d 2000 to ns A lum inium Ro d Extrusio n p la nt w ith G e rm a n te c hn hno o lo g y. M a nu nuf fa c ture d Fi e ld C o m m un uni ic a tio n C a b le s fo r use b y Pa Pa kista n’s Arm e d Forc e s . 974 1 Re ce ived the Top 25 C om p a nies Aw a rd from La un unc c he d A lum inium
Kara ch i Sto ck Exch a ng e.1978
e xtrud e d se c tio ns c o m p rising p ip e s & c urta in ra iling s. 1979
Ag a in Re ce ived Top 25 C om p a nies Aw a rd from
Kara ch i Stoc k Ex Exc c ha ng e.1980
Re ceived C orp ora te Excell Rec enc nce e Aw a rd b y M a na nag g em entAssoci a ti on of o fPaki sta n.19 1982 82-84 Aw arde d to the 6 bes b est tm an anag ag ed co com m pa ni es. Esta b l ishe d Anod izing Pla nt form a nu nuf fa cturi ng ofAl um inium D oors & W i nd ow Se Sec ctions. 1984 Intro d uc e d fo r the first tim e in Pa Paki ki sta n M e d ium Vo Vol lta g e 15 KV XLPE ca c a b le s ful ly typ ype e tested b y KEM KEM A,Holl a nd forsup p l y to KE KESC SC . Se tup a sta te -o f-th e -a rt p la nt to m a nu fa c ture H ig h C o n d u c tivity O xyge n1996 Set Free C op opp p erRod . Be c a m e the
first 1 S0 S0-9 0 0 2 c e rtifie d
c a b le m a n u fa c tu re r in Pa kista n.1997
Re c e ived A c hie vem e nt Aw a rd fo r o utsta nd ing p e rfo rm a nc e in 1 99 66-97 97 1998 p resented b y the Presi d entofPa Paki ki sta n. Be c a m e the first o nly ca Bec c a b le a nd a lum inium certi fi ed forthe ISO 9001 :2000 ve ver rsi on.
m a nu nuf fa c ture r in Pa Pak kista n to b e2000
Introd uced LV XLPE ca c ab l es ful l y typ ype e tested by KEM KEM A,Hol l a nd forthe fi rstti mei n Pa Paki ki stan. 2001 Introd uc uce ed p ow d ercoa ted Al um i nium Profil es. C om m em ora ted 50th Anni Ann i versa ry.
2003
Achieve ved d netsa sal les of ofove ver rRs.1 b i ll ion.
2004
Achieve ved d netsa sal les of ofove ver rRs.2 b i ll ion.
2005
Tabl e ofC ontents Pag age e N o. IN TER N A TIO N A L SYSTEM S O F UN ITS: (S 1 base units,S 1 drive units in electrica cal lengineering, S 1 pr prefixe xes s exp expr ress ssi ing de decim alfactor).
1
W eights & M easures. M axim um cap capaci acity ofcon condu dui its St S tee eel lor P V C . M inim um bend ndi ing radius & sp spa acing of su sup ppo por rtfor cabl cable in ac acce cessi ssible pos osi ition. E lectrica cal lload dem and fordifferenttyp ype e ofoccu ccup pancies vol voltA m ps. S pacing forsu sup pportofco con nduits. M inim um size ofco cop pper earthing lea ead ds,bon ond ding leads & ea ear rth co cond ndu uit. P hysica cal ldim ensions ofca cab bles. C opperw ire flexible ca cab ble co con nductors,co cop pperw ire circu cul larnon flexible.
2-3 4 5 6 7 8-9 10
CU RR ENT CA PAC ITY & VO LTAG E DR O PS: S ing ngl le core P V C insu nsul lated cab cabl les no non n arm ou our red w ith or wi w itho hout ut she sheat ath (Table 4D 1A & 4D 1B 1B) )
11-12
M ulticore P V C insu nsul lated cab cabl les non non arm ou our red (Table 4D 2A & 4D 2B )
13-14
S ing ngl le core P V C insu nsul lated cab cabl les no non n m ag agne net tic ar arm ou our red (Table 4D 3A & 4D 3B 3B) )
15-16
M ulticore P V C insu nsul lated cab cabl les arm ou our red (Table 4D 4A & 4D 4B 4B) )
17-18
S ing ngl le core X LP E insu nsul lated cab cabl les no non n arm ou our red w ith or wi w itho hout utshe sheat ath (Table 4E1A 4E 1A & 4E 4E1B 1B) )
19-20
M ulticore X LP E insu nsul lated cab cabl les non non arm ou our red (Table 4E2A 4E 2A & 4E 4E2B 2B) )
21-22
S ing ngl le core X LP E insu nsul lated cab cabl les no non n m ag agne net tic ar arm ou our red (Table 4E3A 4E 3A & 4E 4E3B 3B) )
23-24
M ulticore X LP E insu nsul lated cab cabl les arm ou our red (Table 4E4A 4E 4A & 4E 4E4B 4B) )
25-26
C orrection factors forca cab bles installation m ethods 18 18,19 & 20 (Ta Tabl ble 4B 4B 3) C olou our rC od odi ing ng. . G raph ofsh sho ortcircu cui itrating. C ables laid directin ground. S ch chedule installation m ethods ofcables ( Layi ng ,H andling & S torage ofpow ercab cabl les ( Fun Fu ndam entalrequirem ents forsafety( Listofdealers /distributers (P akistan C ables)
27
) ) )
28 29 30 31-36 37-40 41-43 44
TH E IN TER N ATIO N A L SY STEM O F U N ITS (SI) SIB ase U nits Q uantity
N am e ofU nit
Length
Sym bol
m eter
m
M ass
kilogram
Tim e
second
s
Electric current
am pere
A
Therm odynam ic tem perature
kelvin
K
Am ount ofSubstance
m ole
m ol
Lum inious intensity
kg
candela
cd
SID erived U nits U sed in E lectricalEngineering
SIunit Q uantity
N am e
Frequency Force Pressure, stress Energy,w ork,quantity ofheat Pow er,radiantflux Q uantity ofelectricity electricalcharge Potentialdifference electricalpotential electrom otive force C apacitance Electric resistance C onductance M agnetic flux M agnetic flux density Inductance Lum inous flux Illum inance Acti vity ofradionuclides Absorbed dose
Expression in term s of otherunits
Sym bol
Expression in term s of SIbase units
hertz new ton pascal
Hz N Pa
N /m ²
s m .kg.s-2 m -1 .kg.s-2
joule w att
J W
N .m J/s
m ².kg.s-2 m ².kg.s-3
coulom b
C
A.s
s.A
volt farad ohm siem ens w eber tasla henry Lum en Lux becquerel gray
V F
W /A C /V V/A A/V V.s W b/m ² W b/A
W
S Wb T H lm Lx Bq Gy
1
-1
m ².kg.s-3.A m -2 .kg-1 .s4 .A² m ².kg.s-3 .A² m -2 .kg-1 .s³.A² -1 m ².kg.s-2 .A -1 -2 kg.s .A -2 m ².kg.s-2 .A cd.sr m -2 .cd.sr* s-1 m ²s-2
SIPrefixes E xpressing D ecim alFactors
Factor
Prefix
Sym bol
Factor
Prefix
Sym bol
10 18
exa
E
10 -1
deci
d
10 15
peta
P
10 -2
centi
c
T
10
-3
m illi
m
10
-6
m icro
µ
10
-9
nano
n
pico
p
fem to
f
atto
a
10
12
10
9
10
6
10 10 10
3 2 1
tera giga m ega kil o hecto deka
G M k
10
h
10
da
10
(1)
-12 -15 -18
W E IG H T S & M E A S U R E S M ETR IC M EASU RES A ND EQ UIVALENTS
LENGTH 1 m illim etre (m m )
=0.0394 in
TH E R M O M E TE R CO M PAR ISO N
1 centim etre (cm )
= 10m m
=0.3937 in
1 m etre (m )
= 100cm
=1.0936 yds
1 kilom etre (km )
= 1000m
=0.6214 m ile
1 sq.cm (cm ²)
= 100m m ²
=0.1550sq in
E =2xC
1 sq m etre (m ²)
= 10,000cm ²
=1.1960 sq.yds
C = F-32 x 5 ÷ 9
1 are (a)
=100m ²
=119.60 sq yds
F = C x9 ÷ 5 + 32
1 sq.km (km ²)
=100hectares
=0.3861 sq m iles
S U R FA C E O R A R E A
CA PAC ITY 1 cu cm (cm ³)
0.0610 cu in
1 cu decim etre (dm ³)
1000cm ³
=0.0351 cu ft
1cu m etre (m ³)
1000dm ³
=1.3080 cu yds
1 litre (l)
1 dm ³
=0.2642 U S gallon
1 hectoli tre (hl)
100 litres
=2.7497 bushels
W EIGH T 1 m illigram m e (m g)
=0.0154 grain
1 gram m e (g)
=1000m g =0.0353 oz
=0.017 chattak
1 kilogram m e (kg)
=1000g =2.2046 lb
=1.07 seers
1 tonne (t)
=1000kg = 0.9842 ton
=26.75 m aunds
Fever Chart
E 81.0 80.0 78.0 77.6 76.6 75.4 74.0 72.2
F 105 104 103 102 101 100 98.6 97
C 40.5 40 39.4 38.8 38.3 37.7 37 36.1
B R ITISH M EA SU R ES A N D EQ U IVALEN TS
LENGTH 1 inch 1 foot 1 yard 1 rod 1 chain 1 furlong 1 m ile 1 nauticalm ile S U R FA C E O R A R E A 1 sq inch 1 sq foot 1 sq.yard 1 acre 1 sq.m ile CA PAC ITY 1 cu inches 1 cu foot 1 cu yard 1 pint 1 quart 1 im perialgallon 1 bushel APO THECA RIES 1 fuild ounce 1 pint W EIG HT Avoirdu po is 1 tola 1 ounce 1 pound 1 seer 1 stone 1 hundredw eight 1 ton U SA D ry M easure Eq uivelants 1 pints 1 bushel U SA Liquid M easure E quivalents 1 fl uid ounce 1 pint (16 oz) 1 gallon U S 1 barrel
= 2.54 cm = 12 inches = 3 feet =55 yards =22 yards =220 yards =1760 yards =6080 feet
= 0.3048 m = 0.9144 m = 5.0292m = 20.117 m = 201.17 m = 1.6093 km = 1.853 km
=6.4516 cm ² =144 sq.inches =9 sq.feet = 4840 sq.yards = 640 acres
= 0.0929 m ² = 0.8361m ² = 4046.9 m ² = 259.0 hectares
= 16.387 cm ³ = 1728 cu inches = 27 cu feet = 4 gills = 2 pints = 8 pints = 8 gallons
= 0.0283 m ³ = 0.7646 m ³ = 0.5683 litre = 1.1365 litres = 4.5461 litres = 36.369 litres
= 8 fldram s = 20 flounce
= 28.413 cm ³ = 568.26 cm ³
= 0.41 oucnes = 437.5 grains = 16 unce = 16 chattak = 14 pounds = 112 pounds = 20 cw t
= 11.6363 g = 28.350 g = 0.4536 kg = 0.93 kg = 6.3503 kgs = 50.802 kgs = 1.0161 tonnes
= 0.9689 U K pt = 0.9689 U K bu
= 0.5506 litre = 35.238 litres
= 1.0408 U K floz = 0.8327 U K pt = 0.8327 U K gal = 42 U S gallon
= 0.0296 litre = 0.4732 litre = 3.7853 litres = 158.98 litres
(2)
Fahrenheit W aterFreezes
C entig- Environm ent rade
32
0
0
212
100
200
-459.6
-273.15
-546.3
M ax.G lobalHum an Env. 122
50
100
W aterBoils Absolute Zero
(H ypothetically the low est,possible tem perature atw hich allm otion w ould cease.
E
F
C
100
122
50
90
113
45
80
104
40
70
95
35
60
86
30
50
77
25
40
68
20
30
59
15
20
50
10
10
41
5
0
32
0
-10
23
-5
-20
14
-10
-30
5
-15
-35.6
0
-17.8
-40
-4
-20
-50
-13
-25
A N G U LA R M E A SU R E
THE M ETRIC S YSTEM
60 second.................................1 m inute
LINEA R M EASU RE
60 m inute.........................................1 degree
..................1 circum ference or graetcircle
10 m illim eters.............................1 centi m etre 10 centim etre.........................1 decim etre 10 decim etre..........................1 m etre 10 m etres .................................1 decam etre 10 decam etres..........................1 hectom etre 10 hectom etres......................1 kilom etre
The earth rotates at a veiocity of15 degree
S Q U A R E M E A SU R E
30 degree...................................1 sign 90 degree............................1 quadrant 4 quadrant,or 360 degree,
100 sq.m illim etres..............1 sq.centim etre 100 sq.centim etres.............1 sq.decim etre 100 sq. decim etres...............1 sq. m etre 100 sq.m etres....................1 sq.decim etre 100 sq.decam etres.........1 sq.hectom etre 100 sq. hectom etres........1 sq. kilom etre
an hour (about) 17.366 m iles a m inute at the E quator);1 degree as therefore equalto 4 m inutes.s
CIRCU LAR M EASURE D iam eter of a C ircle x 3.1416 gives
CUB IC M EASURE
C ircum ference of Circle
1000 cu.m illim etres...........1 cu.centim etre 1000 cu.centim etres.........1 cu.decim etre 1000 cu. decim etres.............1 cu. m etre
D iam eter Squard x 3.1416 gives S urface
LIQ U ID M EA SU RE
Sphere
give R adius.
10 m illim etres.......................1 centilitre 10 centilitres......................1 decilitre 10 decilitres ............................1 litre 10 litres................................1 decalitre 10 decalitres............................1 hectolitre 10 hectolitres..........................1 kilolitre
D iam eter of C ylinder x 3.1416, and
W EIG HT
product by its length, gives the Surface.
10 m illigram s........................1 centigram 10 centigram s........................1 decigram 10 decigram s........................1 gram 10 gram s.....................................1 decagram 10 decagram s........................1 hectogram 10 hectogram s.......................1 kilogram 100 kilogram s..........................1 quintal 10 quintals.................................1 ton
D iam eter S quared x .7854 gives A rea
D iam eter C ubed x .5236 gives Solidity ofSphere O ne D egree of C ircum ference x 57.3
D iam eter Squared + .7854, and product by the length, gives S olid C ontents. A C ircularAcre is 235.504 feet,a C ircular R oad 117.752 feetin diam eter. The C ircum ference ofthe G lobe is about 24,855 m iles and the D iam eter about
IN TER N ATIO N A L PAPE R S IZES
7,900 m iles
A series is based on AO . (841 x 1189) m m ),w hich is the equivalentof a square m etre in area,and each sm aller size, A1, A2, etc., is equalto half the area of the preceding largersizes
D IM E N S IO N S O F TH E W O R L D Equatori alD iam eter................7.926.68 m iles P olar Diam eter...............7,899.99 m iles D ifference..............................26.69 m iles M ean D iam eter.....................7,918.00 m iles
m illim etres
inches
Equatori alC ircum ference
2A
1189 x 1682
46.81 x 66.22
..........................................24,902.37 m iles
AO
841 x 1189
33.11 x 46.81
M eri dionalC ircum ference
A1
594 x 841
23.39 x 33.11
..........................................24,902.37 m iles
A2
420 x 594
16.54 x 23.39
D ifference...........................41.93 m iles
A3
297 x 420
11.69 x 16.54
Area of Surface
A4
210 x 297
8.27 x 11.69
..........................196,950,284 square m iles
A5
148 x 210
5.83 x 8.27
W aterArea...........139,950,284 square m iles
A6
105 x 148
4.13 x 5.83
Land Area...........57,000,000 square m iles
A7
74 x 105
2.91 x 4.13
Volum e ofLand
A8
52 x 74
2.05 x 2.91
..............................320,000,000 cubic m iles
A9
37 x 52
1.46 x 2.05
Volum e ofW ater
A10
26 x 37
1.02 x 1.46
............................320,000,000 cubic m iles
C series ifforenvelopes orfolders suitable for enclosing stationary in the A sizes
AREAS AND DEPTHS OF THE OC EANS
Area O ceans (Square (M iles
G reatest D epth (Feet)
Paci fic.....68,634,000
30,000
Atlantic....41,321,000
27,366
Indian......29,340,000
18,582
(3)
m illim etres
inches
C3
324 x 458
12.76 x 18.03
C4
229 x 324
9.02 x 12.76
C5
162 x 229
6.38 x 9.02
C6
114 x 162
4.49 x 6.38
M axim um C apacity ofPVC /SteelC onduits M axim um capacity ofPVC conduitfor the sim ultaneous draw ing in ofsingle core PVC cables N om inal cable size
N om inal overall diam eter ofcable
mm²
Size and guage o fconduit
20 m m or¾ inch
25 m m or1 inch
32 m m or1¼ inch
40 m m or1½ inch
50 m m or20 inch
P VC I nsu lati on
1.0
2.9
12
18
30
40
50
1.5
3.1
10
15
25
35
45
2.5
3.5
8
12
20
30
35
4
4.3
5
8
12
20
25
6
4.9
4
6
10
15
20
10
6.2
2
4
6
10
12
16
7.3
2
3
5
7
8
25
9.0
-
2
3
4
6
35
10.3
-
-
2
3
5
50
12.0
-
-
2
2
4
M IN IM U M B EN D IN G R A D IU S O F CA B LES Paperinsulated,PVC insulated orXLPE insulated shallalw ays be bentor(Straightened)slow ly;they shall never be bentto sm allradius,The m inim um safe bending radius m ay be taken as given below butw herever possible larger radius should be used
C able cross section & Insulation PV C /XLP E
M inim um B ending radius
M U LTICO RE
Single C ore
U n-arm oured
A rm oured
1.0 m m to 10.0 m m
3D
5D
6D
10.0 m m to 25.0 m m
6D
8D
10 D
25.0 m m to 95.0 m m
8D
10 D
12 D
95 m m to 300.0 m m
12 D
15 D
18 D
300 m m & above
20 D
25 D
30 D
“D ”is the overalldiam eterofthe cable
Allbends shallbe m ade so thatcable w illnotbe dam aged and the radius of the curve ofinner edge of any bend shallnotbe less than stated above.
(4)
(VA) ELEC TR IC A L LO A D D EM A N D FO R D IFFER EN T TYPE O F O CC U PAN CIES VO LT A M PS O ther G adgets/ appliance
Light/Fan
O ccupancy D escription
Per Sq.M eter
A ir C onditioning @ of 1500 VA per ton
Per Sq.ft
Per Sq.M eter
Per Sq.ft
Per Sq.M eter
Per Sq.ft
Banks
35
3.5
20
2.0
65
6.5
B eau ty p arlou rs/B arber shop
30
3.0
40
4.0
200
20.0
M ain Floor
30
3.0
50
5.0
110
11.0
U pper Floors
30
3.0
50
5.0
80
8.0
G round floor
30
3.0
20
2.0
100
10.0
U pper floor
25
2.5
15
1.5
75
7.5
M ultiStory
35
3.5
60
6.0
40
4.0
Single F loor
35
3.5
60
6.0
50
5.0
Hotel & R estaurants
40
4.0
30
3.0
150
15.0
Club & Recreation
20
2.0
30
3.0
150
15.0
C ontinuou s perform ance
30
3.0
50
5.0
100
10.0
N eighbour hood
20
2.0
10
1.0
80
8.0
Hosp itals/C linics
40
4.0
60
6.0
200
20.0
Sc hools/Libraries
30
3.0
25
2.5
100
10.0
Religious P laces
20
2.0
25
2.5
50
5.0
P arking /G arages
10.0
1.0
10
1.0
Nil
Nil
40 - 60
2 -6
As per dem and
As per dem and
As per dem and As per dem and
Electric/G enerator room s
40
4.0
As per dem and
As per dem and
As per dem and As per dem and
M echan icalP lant roo m s
40
4.0
As per dem and
As per dem and
As per dem and As per dem and
Dep artm en tal Stores
Re siden ces
O ffices
Theatre & A ud itorium
Industries
(5)
Spacing ofsupports for conduits
M axim um distance betw een supports
N om inalsize ofconduit
R igid M etal
Pliable
R igid Insulating
H ori zontal
Vertical
H ori zontal
Vertical
H ori zontal
Vertical
1
2
3
4
5
6
7
mm
mm
mm
mm
mm
mm
mm
N etexceeding 16
0.75
1.0
0.75
1.0
0.3
0.5
Exceeding 16 and notexceeding 25
1.75
2.0
1.5
1.75
0.4
0.6
Exceeding 25 and notexceeding 40
2.0
2.25
1.75
2.0
0.6
0.8
2.25
2.5
2.0
2.0
0.8
1.0
Exceeding 40
Spacing ofsupports for cable trunking
M axim um distance betw een supports
C ross-sectionalarea oftrunking
M etal
Insulating
H ori zontal
Vertical
H ori zontal
Vertical
1
2
3
4
5
mm²
m
m
m
m
Exceeding 300 and notexceeding 700
0.75
1.0
0.5
0.5
Exceeding 700 and notexceeding 1500
1.25
1.5
0.5
0.5
Exceeding 1500 and notexceeding 2500
1.75
2.0
1.25
1.25
Exceeding 2500 and notexceeding 5000
3.0
3.0
1.5
2.0
Exceeding 5000
3.0
3.0
1.75
2.0
NO TE :
1- The spacing tabulated allow for m axim um fill of cabels perm itted by these R egulations and the therm al lim its specified in the relevant B ritish S tandard. They assum e that the conduitor trunking is notexposed to otherm echanicalstress 2- The above figures do notapply to lighting suspension trunking or w here specials strengthening couplers are used. A flexible conduit is not norm ally required to be supported in its run. Supports should be positioned w ithin 300m ofbends orfitting
Earth elecrodes (6)
M IN IM U M SIZES O F CO PPER EA R THIN G LEAD S, C O P PE R B O N D IN G LE A D S A N D C O N D U C TO R ILU STR ATIO N O F EA R THIN G LEA D , B O N D IN G LEAD & C IR C U IT PRO TECTIVE CO ND UCTOR TERM S C ircuitprotective conductor
10 3
M inim um sizes of copper earthing leads,copper B onding leads and circuitprotective C onductors notcontained in a com posite cable,Flexible cable,or flexible cord. N om inal C ross Sectional A rea o flargest A ssocited phase cond uctor
N om inalcross sectionalarea ofearthing lead conductor
N om inalcross section alarea o f bo nding lead conductor
N om inal cross section alarea of circuitprotective cond uctor
mm²
mm²
mm²
mm²
C ircuitprotective conductor 8 9 3
4
1.0
6
4
2.5
1.5
6
4
2.5
2.5
6
4
2.5
4.0
6
4
4.0
6.0
6
6
4.0
10
10
6
6
16
10
6
6
25
16
10
10
35
16
10
10
50
25
16
16
70
35
25
-
95
50
25
-
120
70
35
-
150
70
35
-
185
95
35
-
240
120
50
-
300
120
50
-
400
120
50
-
500
120
50
-
630
120
50
-
8
8
8
2
5
7 6
G .LEV EL 1
(See N ote B elow ) 1 = earth electrod e (TT and IT system s) 2 = m ain earthing term inal 3 = exposed - cond uctive -part 4 = extraneous -cond uctive - part 5 = m ain m etallic w ater pipe/gas pipe 6 = other m eans ofearthing (TN system s) 7 = earthing lead 8 = m ain equipotentialbond ing con ductor 9 = su pplem entary equipotentialbonding con du ctors 10 = circuitprotective conductor
E A R T H E LE C T R O D E S The follow ing types of earth electrodes are recognised for the purposes of the R egulations: (i)earth rods or pipes (i i)earth tapes orw ires (iii) earth plates (iv) underground structural m etalw ork em bedded in foundations (v) w elded m etal reinforcem ent of concrete (except prestresse d concrete) em be dd ed in the ea rth (vi) lead sheaths and other m etal coverings of cables, (vii)othersuitable underground m etalw ork. The type and em bedded depth ofan earth electrode shall be such that soil drying a nd freezing w ill not increase its resistance above the required value. The design used, and the construction of, an earth electrod e sh all be such as to w ithstand d am age and to take accountofpossible increase in resistance due to corrosion. The m etalw ork of a gas,w ater or other service shall not be used as a protective earth electrodes. This requirem ent does not preclude the bonding of such m etalw ork as required by Regulation
(7)
PH YSIC A L D IM EN SIO N S O F C A B LES D etails ofC onductors (C opper) N om inal con du ctor area mm
*
M inim um Num ber ofW ires
N om inalD iam eter of C onductor C ircular Com pacted C ircular m m mm
M axim um plain cond uctor at20°C
M axim um tinned con ductor resistance at 20°C
ohm /1000 m
ohm /1000 m
1.0
1/1.13
1.13
–
18.1
18.2
1.5
1/1.38
1.38
–
12.1
12.2
1.5
7/0.53
1.78
–
7.41
7.35
2.5
1/1.78
2.55
–
4.61
4.70
2.5
7/0.67
3.12
–
3.08
3.11
4.0
7/0.85
4.05
–
1.83
1.84
6.0
7/1.04
5.10
–
1.15
1.16
10
7/1.35
6.42
–
0.727
0.734
*16
7/1.75
7.65
7.34
0.524
0.529
*25
7/2.20
8.90
8.54
0.387
0.391
*35
7/2.60
10.70
10.27
0.268
0.270
*50
19/1.85
12.60
12.10
0.193
0.195
*70
19/2.20
14.21
13.64
0.153
0.154
*95
19/2.60
15.75
15.12
0.124
0.126
*120
36/2.12
17.64
16.93
0.0991
0.100
*50
36/2.33
20.25
19.44
0.0754
0.0762
*185
36/2.60
22.68
21.77
0.0601
0.0607
*240
36/2.98
25.65
24.63
0.0470
0.0475
*300
36/3.35
28.80
27.98
–
–
300
61/2.52
32.70
31.45
–
–
*400
36/3.78
-
-
-
-
400
61/2.85
-
-
-
-
500
91/2.65
-
-
-
-
630
91/2.98
-
-
-
-
These are also supplied C O M PAC TED w ith differentw ire sizes and varying num berofw ires,w hich w illnotaffectconductor resistance at 20ºC .
C IR C U LAR PVC Insulated N on-sheathed generalpurpose C able 450/750 volt R igid C onductorC able forconduitw iring
R EF 6491X
Single C ore
N om inalC ross sectionalA rea of C onductor mm²
R adialthickness of insulation (nom inal) mm
M ean overall diam eter (upper lim it) mm
A pproxim ate w eightofcab le
1.0 1.5 2.5 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630
0.6 0.7 0.8 0.8 0.8 1.0 1.0 1.2 1.2 1.4 1.4 1.6 1.6 1.8 2.0 2.2 2.4 2.6 2.8 2.8
2.45 2.99 3.75 4.20 4.88 6.15 7.05 8.75 9.8 11.30 12.90 15.05 16.50 18.35 23.05 26.05 29.05 33.05 37.0 41.0
1.55 2.13 3.45 5 7 12 18 28 38 51 72 99 123 151 188 246 307 394 493 629
(8)
kg /100m
C IR C U LAR C ircular PVC insulated PVC sheathed 300/500 volt(up to 35 m m ²) 600/1000 volt(50 m m ²and above)
R EF 06181Y M ean O verall D iam eter
Single C ore
N om inal C onductor A rea
R adial Thickness of insulation
A pprox. Thickness ofInner C overing
R adial Thickness of Sheath
A pproxim ate w eightof cable
mm²
mm
mm
mm
mm
1.0
0.6
-
0.8
4.15
28
1.5
0.7
-
0.8
4.82
34
2.5
0.8
-
0.8
5.20
49
4.
0.8
-
0.9
6.20
75
kg/km
6
0.8
-
0.9
6.78
99
10
1.0
-
0.9
8.10
155
16
1.0
-
1.0
9.15
225
25
1.2
-
1.1
11.00
340
35
1.2
-
1.1
12.00
445
95
1.60
-
1.60
18.40
1330
120
1.60
-
1.70
20.05
1680
150
1.80
-
1.70
21.90
2000
185
2.00
-
1.80
24.30
2430
240
2.20
-
1.90
27.50
3090
300
2.40
-
1.90
30.15
3770
400
2.60
-
2.10
35.70
4830
500
2.80
-
2.10
39.35
5920
630
2.80
-
2.20
43.45
7420
R EF 06192Y 1.0
0.6
-
0.9
1.5
0.7
-
2.5
0.8
-
4.
0.8
-
6
0.8
-
10
1.0
-
Tw o C ore 4.4 x 6.6
54
0.9
4.8 x 7.6
67
1.0
5.65 x 9.10
99
1.0
6.45 x 10.7
150
1.1
7.25 x 12.05
205
1.2
8.8 x 14.95
325
R EF 06183Y
Three C ore
1.0
0.6
0.4
1.2
8.9
100
1.5
0.7
0.4
1.2
10.05
130
2.5
0.8
0.4
1.2
10.9
180
4
0.8
0.4
1.2
12.75
250
6
0.8
0.4
1.4
14.5
340
10
1.0
0.6
1.4
17.90
540
R EF 06184Y
Four C ore
1.0
0.6
0.4
1.2
9.55
120
1.5
0.7
0.4
1.2
10.20
160
2.5
0.8
0.4
1.2
11.85
230
4
0.8
0.4
1.4
14.3
300
6
0.8
0.6
1.4
16.1
440
10
1.0
0.6
1.4
19.40
680
(9)
C opper W ire Flexible cable conductors N om inal N um berand cross Secti onal N om inaldiam eter Area of wire in conductor
Approxim ate diam eterof conductor
M axim um resistance perkm ofcable at20° C
Bunched M ultiple Standard
Plain
Tinned C onductor
Single core O n flat mm²
6
mm
mm
mm
M ulticore circular
ohm
ohm
Single core on flat ohm
M ulticore circular ohm
84/0.3
3.3
-
3.14
3.30
3.23
3.39
10
80/0.4
4.2
-
1.82
1.91
1.85
1.95
16
126/0.4
5.3
-
1.16
1.21
1.18
1.24
25
196/0.4
6.6
7.1
0.743
0.780
0.757
0.795
35
276/0.4
7.8
8.5
0.527
0.554
0.538
0.565
50
396/0.4
9.4
10.3
0.368
0.386
0.375
0.393
70
360/0.5
11.2
12.4
0.259
0.272
0.264
0.277
95
475/0.5
13.0
14.5
0.196
0.206
0.200
0.210
120
608/0.5
14.5
16.0
0.153
0.161
0.156
0.164
150
756/80.5
-
18.0
0.123
0.129
0.126
0.132
185
925/0.5
-
20.0
0.101
0.106
0.103
1.108
240
1221/0.5
-
23.0
0.0763
0.0801
0.0778
0.0817
300
1525/0.5
-
26.0
0.0611
0.0641
0.0623
0.0654
400
2013/0.5
-
30.0
0.0463
0.0486
0.0472
0.0495
500
1769/0.6
-
33.5
0.0366
-
0.0373
-
630
2257/0.6
-
37.0
0.0287
-
0.0292
-
* These form ati ons are forw elding cables This tables is based on B S 6360 : 1969
C opper W ire C ircular non-flexible cables conductors (annealed) N om inal N um berand cross S ecti onal N om inaldiam eter Area of wire in conductor
M axim um resistance per km ofcable at20° C
N om inal diam eter of conductor
Plain Single core O n fl at
mm²
Tinned M ulticore circular
Single core on flat
M ulticore circular
Nom inal w eight Per km of C onductor
mm
mm
ohm
ohm
ohm
ohm
kg
1.0
1/1.13
1.13
17.7
18.1
17.9
18.2
9.0
1.5
1/1.38
1.38
11.9
12.1
12.0
12.2
13.3
2.5.
1/1.78
1.78
7.14
7.28
7.21
7.35
22.2
4.0
1/2.25
2.25
4.47
4.56
4.51
4.60
35.4
6.0
1/2.76
2.76
2.97
3.03
3.00
3.06
53.2
10
1/3.57
3.57
1.77
1.81
1.79
1.83
89.0
16
1/4.50
4.50
1.12
1.14
1.13
1.15
142
25
7/2.14
6.42
0.712
0.727
0.719
0.734
229
35
19/1.53
7.65
0.514
0.524
0.519
0.529
317
50
19/1.78
8.90
0.379
0.387
0.383
0.391
429
70
19/2.14
10.70
0.262
0.268
0.265
0.270
620
95
19/2.52
12.60
0.189
0.193
0.191
0.195
860
120
37/2.03
14.21
0.150
0.153
0.151
0.154
1086
150
37/2.25
15.75
0.122
0.124
0.123
0.126
1334
185
37/2.52
17.64
0.0972
0.0991
0.0982
0.100
1673
240
61/2.25
20.25
0.0740
0.0754
0.0747
0.0762
2199
300
61/2.52
22.68
0.0590
0.0601
0.0595
0.0607
2759
400
61/2.85
25.65
0.0461
0.0470
0.0465
0.0475
3528
400
91/2.36
25.96
0.0451
0.0460
0.0459
0.0468
3610
* To obtain the m axim um resistance ofhard-draw n conductors the tabulated figures should be divided by 0.97 This table is based on BS 6360:1969
(10)
FUN DA M ENTAL REQ U IREM ENTS FO R SA FETY
W orkm anship and m aterials G ood w orkm anship and proper m aterials shallbe used
G eneral A ll equipm ent shall be constructed, installed and protected and shall be capable ofbeing m aintained,inspected and tested so as to preventdanger so far as is reasonably practicable. A ll equipm ent shall be suitable for m axim um pow er dem anded by the current-using equipm ent w hen it is functioning in its intnded m anner. Allelectricalconductorshallbe ofsufficient size and current-carrying capacity forthe purposes for w hich they are intended. A llconductors shalleither (i)be so insulated and w here necessary further effective ly protected, or (ii) be so placed and safeguarded, to preventdanger so far as is reasonably, practicable. Every electricaljointand connection shall be of proper construction as regards conductance, insulation, m echanical strength and protection.
O vercurrentprotective devices W here necessary to preventdanger,every installation and every circuitthereofshall be protected againstover-currentby (i)devices w hich: w illoperated autom atically atvalues of currentw hich are suitably related to the (ii)safe currentrating ofthe circuit,and are of adequate breaking capacity and w here appropriate,m aking capacity,and (iii) are su itably loca ted and are ccnstructed as to prevent danger from overheating,arcing or the scattering of hot particles w hen they com e into operation and to perm itready restoration ofthe supply w ithoutdanger.
Precautions againstearth leakage and earth faultcurents. W here m etalw ork ofelectricalequipm ent, other than current-carrying conductors, m ay becom e charged w ith electricity in such a m anner as to cause danger: (41)
(i)the m etalw ork shallbe connected w ith earth in such a m anner as w ill cause discharge of electrical energy w ithou t danger,or (ii) other equally effective precautions shall be taken to prevent dang er. Every circuit shallbe arranged so as to prevent the persistence of dang erous earth leakage currents. W here m etalw ork is connected w ith Earth in accordance w ith relevent reg ulations. the circu it concerned shallbe protected againstthe persistence ofan Earth fault currentby: (i)the over-currentprotective devices as required by regulation or (ii) a residual current device or equally effective device. The m ethod described in item (ii)above shallbe used w henever the prospective Earth faultcurrentis insufficientto cause prom pt op eration of the over-cu rrent protective devices. W here any m etalw ork of electrical equipm ent is connected w ith earth in accordance w ith reg ulation and is accessible sim ultaneously w ith substantial exposed m etal parts of other services, the latter shallbe effectively connected to the m ain earthing term inal of the installation.
P rotective d evices an d sw itch es A single-pole fuse sw itch or circuit-breaker shallbe inserted in the phase conductor only. N o sw itch or circuit-breaker, excep ting w here linked,or fuse shallbe inserted in an earthed neu tral conductor and any linked sw itch or linked circuit-breaker inserted in an earthed neutralconductor shallbe arranged to break allthe related phase conductor
Isolation and sw itching Effective m eans,suitably placed for ready operation, shall be p rovided so that all voltage m ay be cutfrom every installation, from every circu it thereof and from all equipm ent, as m ay b e necessary to prevent or rem ove danger. E very fixed electric m otor sh all be provided w ith an efficient m eans of sw itching off,readily accessible,easily operated and so placed as to prevent danger. (42)
A ccessibility o f equipm en t Every piece ofequipm entw hich requires operation or attention by a person shall be so installed that adequate space are afforded for such operation or attention.
P recau tion in ad verse co nditions Allequipm ent likely to be exposed to w eather,corrosive atm osphere or other adverse conditions, sh all b e so constructed or protected as m ay b e necessary to prevent danger arising from such exposure. Allequipm entin surroundings susceptible to risk of fire or explosion shall be so constructed or protected and such other special precau tions shall be taken, as m ay be necessary to prevent danger.
A d d itio n s a n d alteratio n s to an installation N o addition or alteration, tem porary or perm anent,shallbe m ade to an existing installation,unless ithas been ascertained that the rating and the condition of any existing equipm ent,including that of the supplier, w hich w ill have to carry any additionalloads is adequate for the altered circu m stan ce s an d th e e arth ing arran g m en ts is also ad eq u ate.
Insp ection and testing O n com pletion of an installation or an extension or alteration o f an installation,appropriate inspection and tests shallbe m ade,to verify so far as is reasonab ly p ractica b le th at th e requirem ent of regulations have been m et. The p erson carrying ou t the inspection and tests or a person acting on their behalf,shall inform the p erson ordering the w ork ofthe recom m endations forperiodic inspection and testing in future.
(43)
PR O D U C T R A N G E PR O D U C T G ENER AL W IRING
S P E C IFIC A TIO N 450 /750V & 300 /500 V BSS -6004 :2000
RANG E a) SIN G LE C O R E 1m m ²to 16 m m ² b) M ULTIC O R E 1 m m ²to 10m m ²
L.V.CA B LE
600 /1000V & 1900 /3300 V
CO PPER O R ALUM INIUM BSS -6346 :1997 C O N D U C T O R X LP E O R PV C IN SU LATED
U SA G E H ouse w iring Ind ustrial lighting & C om m ercial buildings
Industrial P rojects e.g. Te xtile, F ertilize r, S ugar, Arm oured /Unarm oured R efine ries C em en t etc.
a) SIN G LE C O R E 25m m ²to 1000 m m ² b) M ULTIC O R E 16 m m ²to 400 m m ²
Arm oured /Unarm oured
11000 - 15000 V M .V.CA B LE CO PPER O R ALUM INIUM IEC -502 :1994 C O N D U C T O R X LP E O R PV C IN SU LATED
a) SIN G LE C O R E 16 m m ²to 630 m m ² b) M ULTIC O R E 16 m m ²to 300 m m ²
P rim ary C ab le o f U tility C o m pa n ie s fo r distribution to S ub-S tation
BSS :6360 :7884,215
Upto 500 m m ²
O verhe ad Tran sm ission Line s
C O N TR O L C A B LE S
600 /1000 V BSS -6346
M ULTIC O R E 1.5 m m ²to 4.0 m m ²
Industrial C ontrol W iring
W ELDING CAB LES
PC L design w ith synthetic rubber insulation
16 m m ²to 300 m m ²
A rc W elding P lan t
TELEPHO NE C AB LES
PC L Design
1 pair to 20 pairs Arm oured /U narm oured
Teleco m m un ication
CONDUCTOR PAC C /HD BC /AC SR /AAC
PV C /PE IN SU LATED
SPEC IA L CA BLES a) AI R
FIELD LIG HTING CA BLE
b) CO AXI AL C AB LES
c) S U B d) M
C ivil A viatio n A u th o rity
A irpo rt L ig h tin g
5C - 2V 75 ohm , R G - 6, R G - 11
D is h A n te n n a C C T V a n d C a b le W irin g W ater Su bm ersible Pum ps.
M E R S IB L E C A B L E S
IS C E L L A N E O U S O T H E R C A B L E S A s per custom er’s requirem ents
A LUM IN IU M SEC TIO N (Profiles) A lum -Ex B rand
B S-1474,A S TM -B 221, B S -3 98 7 & A A M A C L A S S -1
a) S ections for sliding doo rs an d w ind ow s b) Sections for hinged doo rs and w indo w s
A rchitectural, Industrial& C om m ercial.
c) S ec tion s for fixe d g lazing/sh op fron ts d) S ection s for do ub le g lazed sliding D o o r s an d W in d o w s
e) S ections for do ub le g lazed op enab le
A nodized A s W ellas
d o o rs & w in d o w s
Po w der C oated
f) G lass d oo r section s g) C urtain w allsec tion s/Struc tural glaze d sec tion s
h) C entrally pivo ted w ind ow sec tion s i) S w ing d oo r sections j) Sections for casem ent/aw ning w indo w s k) F alse ce iling sec tion s l) Specialsections to su it custom ers’specific needs
H ig h co n d u ctivity O xygen free
C O P PE R R O D
A S TM B -49
8 m m D ia
E nam el w ire m anu facturing , E lectrical/co m m un icatio n w ires, cab les, con d uctor & ena m elled w ire.
