Why are coal and salt added to the pit ib the ground?
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Adding charcoal and water in earthing pit decreases soil resistivity. The layer of charcoal and salt helps to maintain low resistance for earth fault currents. Because of ionic behavior of salt and charcoal they will maintain moisture content around the earth pit.
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- Charcoal is used to retain the moisture for a long duration because it is an adsorbent and salt is added to increase the conductivity.
- The purpose of earthing is to bring the fault current to the ground without any leakage .
- charcoal and the salt is added to the pit in the ground while earthing.
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