Question

why is earthing of electrical equipment is necessary? explain with sketch any one type of earthing.

Answer 1

It is called grounding and the process is necessary so that the electricity can go to the ground.  In the case of a lightning rod it is so that the building does not catch on fire and in normal household appliances it allows it to run more smoothly.

Answer 2

Hi friend...
First see the first attached file for sketch

Now I am going to answer your first question

QUESTION ==
why is earthing of electrical equipment is necessary?

ANSWER ==
Earthing (definition)
Earthing (also known as grounding) refers to contact with the Earth's surface electrons by walking barefoot outside or sitting, working, or sleeping indoors connected to conductive systems, some of them patented, that transfer the energy from the ground into the body.

Now see the second and third attached file for its necessity...

I hope it will help you mate
#yahyaahmad#