Answer / ramkumar

Earth pit resistance must be less than 1 ohm then only we
have to get good earthing

Answer / pradhyumn

Should be less than unity.

Answer / neelakandan

earth pit value is not constant it's very from soil and
it's value less than unity

Answer / bhatt

For important installations such as Sub station and data
centre, it should be less than 1 Ohm. It can be upto 5 ohm
for residential aplication.

Answer / shimran

less then 1 mean 0.10 to o.2 ohm

Answer / koti

for Individual pit; no specific fig ( in general max of 5 ohm)by standards but grid should be less than 1 ohm.

Answer / g narayanarao

It should be less than 1ohm in case of switch yards and It
should be less than 2ohms for industrial applications and
for other demostic applications it should be less than 5ohms

how to calculate power factor of capacitor? what is transformer rating?

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what is resistance

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6 Answers