Three way plug point is there ,in that plug why we need
earth pin is bigger than compare with phase and nutral pins?
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Answer Posted / dhivyabharathi
The earth pin has to send fault current to earth.so, the
resistance of that path should be low.to get low resitance,
cross sectional area should be more. it can be understood
from R=pl/A.so the cross sectional area of tat pin should be
high.
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