Answer / kaustav bhadury

Body earth pits and Neutral earth pits must never be
interconnected.
As per Indian Standards, they must be seperately grounded
into different Earth pits.

Answer / dayal varma

to make standby if neutral fail then the device get the
neutral from the earthing.

Answer / yogesh

If neutral earthing pit is separate & body earthing is
separate & if there is body earth fault voltage will develop
at the body suppose 230 V & someone touches body & neutral
potential difference will be 230 V & person will get shock.

If both pits are interconnected same potential will be there
& PD will be zero. So no shock.

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