What should be the earthing resistance of an industrial
substation and also What should be the house hold earthing
resistance?
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Answer Posted / manoj mahajan
As per IS: 3043-1966, "Code of Practice for Earthing", the
Earthing Resistance shall not be greater than 5-ohms. The
Earthing Resistance of a Power Station shall be not more
than 0.5-ohm while that of a major and a minor substation
shall be not more than 1-ohm and 2-ohms respectively.
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