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What is Earthing? The metallic parts of electric machinery and devices to the earth plate or earth electrode through a thick conductor wire (which has very low Resistance) for safety purpose is known as Earthing or grounding. Methods of Earthing | Types of Earthing 1). Plate Earthing: In plate earthing system, a plate made up of either copper with dimensions 60cm x 60cm x 3.18mm is buried vertical in the earth (earth pit) which should not be less than 3m (10ft) from the ground level. Pipe Earthing • A galvanized steel and a