What is the permissible value of earth resistance!
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Answer Posted / p.gupta.1852
Earth resistance should be as small as possible . It
depands on voltage level of the system to be grounded . As
voltage level increases the earth resistance required to be
nearer to zeero as far as possible . Earth resistance
should not exceed 5 ohm for 433V distribution system and
should be below 1 ohm for 66 KV Grid .
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