Most of the electrical appliances need earthing.

1. Earthing connects the metallic body of electrical appliances deep inside the earth.
2. In case the appliance is faulty, the live wire comes in contact with the metal body of the appliances.
3. Due to earthing the current flowing through the metal body passes to earth and the user handling the device does not get shock. Therefore most of the electrical appliances having a metallic body need earthing.