if we want ot select cable size with reference to load
current it take than what is the formula and it is same for
aluminium or copper?

Answer Posted / k.prakashchandra

In case of transformers, for copper cable 2.5A/sq mm and Al
i.5A/sq mm ,for generators 1.5A/sq mm and 1 A/sq mm
respectively.For others 4A & 2.5A per sq mm

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