what is the resistance value of earthing pit and why they
are connected?
Answers were Sorted based on User's Feedback
Answer / pradeep kumar dhar
The resistance value varies according to the nature of the
soil.It is very high for rocky soils.A value of 1 ohm or
less is considered to be very good.Several pits are
interconnected to reduce the value of earth resistance.
Is This Answer Correct ? | 20 Yes | 2 No |
Answer / vikram
The resistance value depanded to the nature of the
soil.The resistance value is very high for Hill area. when
resistance value of lessthan 1 ohm this value is very good.
Is This Answer Correct ? | 6 Yes | 1 No |
Answer / parmod kumar
The resistance value of Earth Pit should below 1 Ohm &
Earth pit are connected to reduce the earth resistance
value.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / ajoy kumar
In some cases like rocky soil, the resistance value of individual earthpit become more than 5 ohms. For these cases, we can consider the combined earthing and it should be atleast less than 1 ohm.
Is This Answer Correct ? | 2 Yes | 2 No |
Answer / &
the earth resistance
more than 1. and any
switch yard
maintain...earth
resistance below 3
meter, with the mat
giiii
Is This Answer Correct ? | 1 Yes | 1 No |
What is 100% protection of generator? Why 95% protection is used not 100%?
What is RMU, and what it's function?
How seriving & testing of the HT & LT breakers are done. What are the standard Ir values on which we can come to know the test is passed or failed?
why we use DO Fuse in H.T. Line ? What is the purpose of DO Fuse
Advantage of LT panel vs HT panel ?
when running 2 nos 450kva dg sets in parallel operation ,in one Dg set power factor and Kvar going to lagging and ampere suddenly going high,please give me suggestion to correct the same.
how to calculate units consumption for a 12 hp motor /hr.
what is green house effect?
what is the ground fault relay,which purpose it will be use,clearly tell me plz
what happens when the supply frequency to the tube light is reduced to 25Hz....?
what are the precuation should be taken ahen installing power transformer,circuit breaker,current & potential transformer
wha tis the ac motor used for traction system