What is the min and max ohmic value for earthing?
Question Submitted By :: Electrical-Engineering
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it's depend on system
Basicaly for LV system it should be less than 1 ohm and
for MV system it should be in rage of 1 to 5 omh
ideal is 0 resistance but practically it is not possible Sham
It is depending on usage
LV- for copmutor/ electronic device --- 0- 1 ohm
for UPS --- 0- 1 ohm
HV - for substaion/ power generating system- 0- 5 ohm
but 0 is not possible. Satya Dev ( Knight Frank)
max 8 Ppc
max 5ohm Suresh
For derty Earth: the min is zero as ideal case and the
maximum shoildn't more that 1.5 ohm.
For Clean earth the min as before and the maximum is 1 ohm. Mgalalkhedr
It depends on the system and the resistivity of the
soil .Minimum is less than 1 ,Maximum is 10 ohms . Ahmed
Individual value should be less than 5 Ohms , as low as
possible, Combined value to be < 1 ohms , it is not
dependent on voltage level Arjun
The whole list of answers is confusing.
No one is telling the correct values for a normal
Industrial machinery which sometimes includes sophisticated
machinery using Computers and electronics circuit.
I want to check the earthing status of some of the Earths I
did about 5 years ago in my factory.
Can someone help me in this.
firstname.lastname@example.org R Prakash