Answer / rajkumar nirmalkar

We provide earthing to restrict the fault current since the
earth is considered to be as zero potential .
We also protect man and machine from the hazardous current
flowing from the equipment in case of any fault.

Answer / baiju k nair

It is nothing but a protection for the personnel and the
costly equipment. In case of any falut in the system a
large amount of current flows through the equipment which
may damage the costly windings of the motors or
transformers, and can also be dangerous for the personnel
at sight so earthing will divert the large current to the
earth thus protecting the equipment and the personnel.

Answer / sujit288

It is the connection between the metalic body of equipment
and mass of earth for protect man and machine from the
hazardous current flowing from the equipment in case of any
fault

Answer / t.c.raghavendran prabhu (lnt)

There are three major Factors that influences good earthing:

1) Earthing is mainly done to arrest the flow of jumping
electrons from the body to the ground because the ground
potential is zero.

2) Mainly body earthing of the equipment has to be done to
avoid the damage and losses of machine & humans.

3) Good earthing resistance is 1-2 ohms.ELCB ie,Earth
Leakage Circuit Breaker has to be placed in the Panel
boards for the safety purposes.

Answer / s. prakashmurthy

The earth connection improves service continuity and avoids
damage to equipment and danger to human life.
The object of an earthing system is to provide as nearly as
possible a surface under and around a station a uniform
potential and as nearly zero or absolute earth potential as
possible.In general, all parts of apparatus other than live
parts,shall be at earth potential which is always at a zero
potential.
( This information is referred from IS:3043 - 1987 for the
benefit of readers ).

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