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how to calculate the size of cable for 100 kva load,?can
somebody tell me with a formula
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Answer Posted / virendra
Considering Powe factor 0.8
Kw = KVA*.08
KW = 100*0.8
= 80 KW
w = 1.73 * 415 * Il * 0.8
80000 = 1.73 * 415 * I1 * 0.8
I = 80000/ 1.73*415*0.8
= 139 Amp
You can choose the cable which current carring capacity per
phase is on or above 140 Amp
By considering the future expansion of load the 180 Sq.mm
AYFY cable is ideal.
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