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Question
how to check the earth resistance value& what is the 
minimum earth resistance for good earthing sysytem.
 Question Submitted By :: Suresh
I also faced this Question!!     Rank Answer Posted By  
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 21
the earth resistance should be less than 1 ohm. if we using
digital earth resistor, then one common method used as
three terminal type and the distance between these three
terminal should be 20 to 30 meters.
 
Is This Answer Correct ?    2 Yes 3 No
Chanchal Tiwari
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 22
normly earth res.value for an industrial area is 1 to 5
res.for rock sail area and residential area, this value is
8 and 1-3 res respectively.further ithink this depends upon
ur mant. capability. this can be maintened by checking
earthing pit time to time. it also depends the size of
earthing patti and the load capicity set against it.
 
Is This Answer Correct ?    2 Yes 1 No
Dipeandra Deepak
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 23
please give me the earth system 
Is This Answer Correct ?    2 Yes 1 No
Ashwin Trikha
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 24
EARTH RESISTANCE FOR GOOD EARTHING IS LESS THAN 5 OHM & GRID
RESISTANCE IS LESS THAN 1 OHM
 
Is This Answer Correct ?    8 Yes 1 No
Rahul Patil
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 25
earth resistance of individual earth pit should be less
than 5ohms and when it is connected with grid should be
less than 1 ohms
 
Is This Answer Correct ?    1 Yes 1 No
G Umamaheshwar Rao
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 26
strictly earth resistance must be zero 
Is This Answer Correct ?    0 Yes 6 No
Prashant
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 27
By using Earth Megger to check the earth resistance and
Minimum earth resistances for good earthing is 0 ohm to 5 ohm.
 
Is This Answer Correct ?    1 Yes 1 No
Kallesh
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 28
There is not one standard ground resistance
threshold that is recognized by all agencies.
However, the NFPA and IEEE have recommended
a ground resistance value of 5.0 ohms
or less
 
Is This Answer Correct ?    0 Yes 0 No
Guru
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 29
value depends upon the soil resistivity but in reality it
should be zero to get better result. As per recommendation
by NFPA and IEEE it should be less then 5 ohms.
 
Is This Answer Correct ?    0 Yes 0 No
Bhushan
 
  Re: how to check the earth resistance value& what is the minimum earth resistance for good earthing sysytem.
Answer
# 30
Earth Resistance test to be conducted on summer conditions to achieve the correct value by using an earth resistance tester (From Megger/ Sanwa/ Fluke). The value should be less than 1 Ohm for electrical earth pits and less than 10 Ohm for Lightning protection System. Procedure for testing should be as per the equipment. 
Is This Answer Correct ?    0 Yes 0 No
Robeesh
 

 
 
 
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Ohm's law applicable for semi-conductors?   4
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in magnetic field we send current to generate flux,why not voltage?   2
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What are the minimum acceptable insulation resistances of insulation of underground cable suitable for 0.440kV,11kV, 33kV and 66kV?   2
 
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