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Why? We r used 50sq. mm. And above size cable in 3.5 core and below size are used in 4core

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Why? We r used 50sq. mm. And above size cable in 3.5 core and below size are used in 4core..

Answer / k.prakashchandra

Above 50 sq mm cables are usually used 3 phase loads and
fair balancing of loads is expected.As the neutral current
is unlikely to exceed 50 % of full load ,half the core size
is sufficient to save money

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Why? We r used 50sq. mm. And above size cable in 3.5 core and below size are used in 4core..

Answer / diwakar

We even have three phase loads used in 25 and 35 cant say that as the reason alone.

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