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Answer Posted / kumar manish
Earthing: It is done for the protection of human life/ user
of an electrical equipment. It simply means connecting all
the metallic parts of an electrical equipment to the earth
potential. Even in the absence of any backup protection if
a phase/ live wire is shorted with the metallic part of the
equipment body; as the user and the equipment will be at
the same potential and hence will not get any shock!
Grounding: It is purposely done to create a zero potential
in a live circuit. Commonly it is the neutral in a circuit
that is grounded, one good reason is the detection of an
earth fault in a grounded power system. In electronics
circuit it is done to avoid unnecessary noise(voltage build
up) in the circuits due to Radio Frequencies.
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