Earthling and its importance.

The system of connecting the metal casing of an electrical appliance to a

copper plate buried deep inside the earth is called as earthling.

Many appliances such as an electric heater, a toaster, an oven, a

refrigerator etc. have a metallic body (casing). If with use the insulation of a

wire breaks or melts, the live wire may touch the metal casing. If we happen to

touch the casing carrying a current, we may receive a severe shock which may

cause death. To avoid this, metal casings of all electrical appliances are

earthed. One end of a thick copper wire is connected to the metal casing of the

appliance and the other end is connected to a copper plate buried deep inside

the earth. The current through the metal casing then flows to the earth and the

person touching the casing is saved.

Sanjay Ranade

Team Ednexa