I want to give Power supply to a house from the Feeder,
Total Load of the House is 128 KW, how to calculate cable
size for this load ?
Answers were Sorted based on User's Feedback
Answer / s. patel
the equation of Power:
P=VICos (phi)
for single phase:- if load is 128 kw for single phase
then...Iph=(p/vph Cos(phi)(assume:p.f=1)
= 128000/(240x1)
=533Amp so this need 400-500sq mm 1 core of copper ok...
and if 3 phase is there
then
p=1.73xVLxILxCOS(phi)
IL=128000/(1.73x415x1)
=178Amp
if it may p.f is down up to 0.85 then current rating will increase by 200 to 210 Amps
so we have to select the cable as per their current carrying capacity up to 210 amp for three phase connection.
So we have to select 95 sq mm x 3 core...ok
Is This Answer Correct ? | 10 Yes | 1 No |
Answer / s.patel
means for 3 phase connection
95-120 sq mm x3c of copper or for aluminium 150-185 sq mm x3c is required...
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / charan
Pl. Exp me how to Calculate the size.. i mean i want the
formula for that..
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / s. patel
if you are using 1 phase with 128 kw then you need to select the 500 sq. mm or if you are using 3 ph. then you have to select 4x120 sq mm of copper pvc cable armored or unarmored
and fro alluminium 4Cx185 sq. mm pvc cable is require.....
Is This Answer Correct ? | 0 Yes | 2 No |
Answer / k.prakashchandra
Diversity factor can be taken as 1.5 to 2.5 depending upon
the simultaneous similar loads.You can use 4x50 sq mm copper
cable or 4x70/95 sq mm Al cable.
Is This Answer Correct ? | 0 Yes | 3 No |
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