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Why used in layer by layer charcoal and salt used in earth
pits.
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Answer Posted / raj
The salt and charcoal is added in earthing pit to lower the resistivity of the soil. The salt and charcoal have good ionic behavior and reduce the soil resistance. The lower earth resistance is must to quickly pass the earth fault current to ground.
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https://www.cselectricalandelectronics.com/question/why-salt-and-charcoal-are-added-in-earthing-pit/
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