how to choose the cable rating for load (KW)? EXAMPLE.50KW load

Question Posted / radhakrishnan

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how to choose the cable rating for load (KW)? EXAMPLE.50KW load..

Answer / er.p.somasundaram

1 H.P = 1.25 Amps
IN CASE ALUMINIUM CONDUCTOR USE CONSTANT VALUE IS =0.75
IN CASE COPPER CONDUCTOR USE CONSTANT VALUE IS =1.25

SO CONDUCTOR SIZE= 1.25*1.25(CU)=1.25SQMM

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26 Yes

35 No

how to choose the cable rating for load (KW)? EXAMPLE.50KW load..

Answer / er.p.somasundaram

10 H.P = 10.25 Amps
IN CASE ALUMINIUM CONDUCTOR USE CONSTANT VALUE IS =0.75
IN CASE COPPER CONDUCTOR USE CONSTANT VALUE IS =1.25

SO CONDUCTOR SIZE+cable sqmm *075 =10.25amps, now a days increase current so cable size is small size increases.
10.25*0.75=10 sq mm

Is This Answer Correct ?

15 Yes

33 No

how to choose the cable rating for load (KW)? EXAMPLE.50KW load..

Answer / parasuram

Cable carring capasity is there.. we can get form cable
manufacturer...

for 50kW load,
current(I) = 50/(1.732*415*.8(p.f))
I = 28.75A
For 1.5Sqmm cable curent carring capasity = 20A in ground
2.5 = 27,
4 = 34,
6 = 43,
10 = 57,
16 = 73A like that.
now our load current is 28.75A
No.of cable with size =28.75/43A (6Sqmm)
= .6686/.7 (Diff factor)
=.955
there fore 1run 6 Sqmm aluminium cable we selected for 50
kW load.

Is This Answer Correct ?

31 Yes

153 No

how to choose the cable rating for load (KW)? EXAMPLE.50KW load..

Answer / suresh kumar

Copper Cable: Sqmm*1.5, Exam: If we have 50 Sqmm copper
cabe, The it will take load is 50*1.5=75Amp

Al Cable is multiplying factor of 1.
Exam: 50 Sqmm cable will take 50A load.

Is This Answer Correct ?

98 Yes

233 No