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What is the function of an earth wire? Why is i...

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Question: What is the function of an earth wire? Why is it necessary to earth metallic appliances? Answer: The wire which is in contact with the earth from the metallic part of an electrical device is called an earth contact wire. It is color is green. In a faulty situation, if an electric current start flowing in the metallic part of the equipment, then there is a possibility of an accident. If there is earth contact, then the current is transferred to the earth. This does not cause electric shock and prevents accidents.

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