Question

what is earthing?
why it is necessary?

Answer 1

As it's a safety factor, earthing is essential and mandatory. It's an electrical connection between the exposed metallic parts of an electrical appliance or installation and the earth, regarded to have zero potential. dangerous level of potential or voltage that endangers the user's life.Aug 10, 2008

Answer 2

Earthing an electrical applicance means to connect the outer metal case of the appliance to the earth by means of a conducting wire. It is done to prevent electric shock caused due to an accidental charging of the metal case of the appliance.

It is necessary because it it reduces the chances of getting an electric shock, which sometimes could be fatal.