What is the type of electrical earthing recommended in hard
rock area

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What is the type of electrical earthing recommended in hard rock area..

Answer / kishore

couterpoise type

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What is the type of electrical earthing recommended in hard rock area..

Answer / k,prakashchandra

6" dia deep( up to 75 m) bores ,40mm dia MS rod as
electrode and Bentonate clay for filling

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