Question

State the function of an earth wire? Why is it necessary to earth metallic appliances such as an electric iron?

Answer 1

The main function of the earth wire is to prevent live wire from overloading and absorbs the excess electrons & flows to beneath the ground . It is necessary because it prevents the electrical appliances from damage and absorbs the excess electricity from appliances.

Answer 2

The main function of the earth wire is to conduct the leaking current  from the electrical appliance to the ground . It is conected to the outer metallic body of the appliance .

It is necessary to earth metallic appliances , as it protects the user from electric shocks by transferring the current to the earth.