Why don't we use ground free electricity to avoid electric
shock.As birds are do not get shock.
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Answer / dheeraj
Grounding of large installation is necessary for earth fault detection and timely tripping of CBs. Without grounding hazardous potential may develop over the equipments which causes damage to the costly equipments.
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If you mean that we do not earth the neutral?
In a perfect situation this would be good and reduce the
risk of electric shock.
Unfortunately in real life it can only work in small
situations - using an isolation transformer for a handheld
light for example.
In large installations there is always a risk of failures
of insulation or machines. This would then cause a
connection of the neutral or phase to earth and therefore
it would no longer be ground free. The other thing is that
no insulation is perfect and there will always be leakage
with the same result.
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