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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 :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 21
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
 
Answer
# 22
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
 
Answer
# 23
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
 
Answer
# 24
depends on the supply system 
Is This Answer Correct ?    14 Yes 15 No
Stephen
 
Answer
# 25
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
 
Answer
# 26
Switch on the multimeter, and using the dial on the front, select the resistance function. The multimeter will have two probes with metallic pointed ends. Place the probes on either side of the earth wire. The display on the multimeter should show a low resistance of approximately 0.5 Ohms. If the resistance is significantly higher than this, the wire is faulty and needs to be replaced. 
Is This Answer Correct ?    0 Yes 1 No
Prince
 
Answer
# 27
The Earth resistance 
Is This Answer Correct ?    6 Yes 8 No
Yashvardhan Anand
 
Answer
# 28
by using mager we can find the value of earth resistance.
there are three types of resistance
1}low resistance
2)medium resistance
3)high resistance

earth resistance comes in LOW RESISTANCE it should be blow
then 1ohm.
 
Is This Answer Correct ?    2 Yes 6 No
Malik
 
Answer
# 29
strictly earth resistance must be zero 
Is This Answer Correct ?    0 Yes 6 No
Prashant
 
Answer
# 30
good earthing less than 3 ohms 
Is This Answer Correct ?    44 Yes 59 No
Shiva
 

 
 
 
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