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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..

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..

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

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