Question

What can be the function of an earth wire? Why is it required to earth the metallic appliances?

Answer 1

Earth wire or else we can say that the Earthing connection in an electrical wiring at home is connected to a high capacity storage of metallic or salted materials. These materials can drain electric charge when it is available on the wire and make the charge or the voltage potential on the wire to be zero. This all will help you in answering this question.

Complete answer:
Generally the metallic bodies of the electric appliances are being connected to the Earthing by using the three-way plug connections. When there is an overflow in the electric power supply or maybe there is a short circuit somewhere. At this time these large values of voltage and the excess current flow into the Earthing connection. So the appliance will be secure from the damage. When the electric wiring in the house or in the appliance is found to be wrong, and because of that the metallic body of the appliance is carting electricity on it. Then this high voltage or leaked charges will be made to flow into the earth by the process of earthing. This can help us from the exposure to electric shocks when we touch the appliances. In short we can say that the main function of earth wire is to protect the metallic appliances from sudden damage because of the leakage of current.

Note:
The colour for the earth wire was in green before the arrival of the 1977 IEE regulations. After these regulations, the earth wire colour is now being featured as green and yellow stripes also. This is in accordance with IEC regulations. It will be having a key safety function of relating the metal casing of the electrical appliance with the ground.