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What is the function of an earth wire? Why is it necessary to earth metallic appliances?
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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