Arrangement of earthing materials.like what we put

Arrangement of earthing materials.like what we put first charcol,then salt.then plate.
Plz answer me about that.

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Arrangement of earthing materials.like what we put first cha..

The layer of charcoal and salt helps to maintain low
resistance for earth fault currents.Because of ionic
behaviour of salt and charcoal they will maintain moisture
content around the earht pit.

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