why earth hole size is biggest in plug point?

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why earth hole size is biggest in plug point?..

Answer / azhar malek

the earth hole is big cause of the resistance if the hole
is small than res. will high and therefore we could not get
much better result, that's why it is kept bigger than phase
and neutral

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why earth hole size is biggest in plug point?..

Answer / mohanraj

to A.senthil Kumar

can u explain this in another way which can be under
standable by every one ok plzzzzzzzzz

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