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sir, i want to know the calculation for find rated current
for cable sizes.(both copper & aluminium) with examole.
please sir
for example: 35sq.mm al.cable is withstands for how many
amps?
is suitable for 45kw motor?
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Answer Posted / jack
For 35mmsq size cable ,current anything more than 150
ampers is applicable.To find current use the formula P=VI
COSfi,WHERE COSfi=0.8 ,from this find current I,to find the
cicuit breaker size use the formula c.b rating =I(1.1-
1.25) ,this will give the ciucit breaker size,
Cuurent (amp) Cable Size (mmsq)
10 1.5
25 6
50 15
100 25
150+ 35
| Is This Answer Correct ? | 2 Yes | 0 No |
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