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. What should be the minimum and maximum ohmic value for
earthing?

. What should be the minimum and maximum ohmic value for earthing? ..

There is no specific value as such, but usual values are as follows.
1) Generating Stations less than 1 Ohm.
2) 220kV Sub stations up to 1 Ohm.
3) 66kV S/S up to 2 Ohm.
This should be as low as possible.

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