Why is coal used in earthing? - QuoraJul 13, 2015 . In eathing, a mixture of charcoal and salt is used . For earthing the ground resistance should be minimum in order to allow immense current to.use of coal lim stone and salt in grounding,Why do you use salt and coal in earth pits - AnswersMaterials needed: (1.25 m) copper road , salt and coal . 2. How to make to GI earth pit : a. Dig a hall in the dirt ground at least for 1m depth. b. Install a PVC pipe.
use of coal lim stone and salt in grounding