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how to caluclate cable size by Amps

Answer Posted / harshad

First calculate the current.
Eqn for 3phase: Current= Connected load in watt/sqr root of 3*415*pf

Eqn for 1phase: Current=Connected load in watt/230
Select the cable size from the chart with respect to the current.
pf(power factor) is 0.8 or 0.9

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