Answer / pradyumna chandra panda

Earth electrod should have low resistance and copper flate meet it. IF we use GI flate then potentional between earth &neutral will be increase on unbalance load, but it is allowed only 20 volt . we can decreare the earh resistance by increance the electrode in parallel.

Answer / balu

Copper flat is low resistance than
compared to gi and it has good
mechanical strenth.

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