Answers were Sorted based on User's Feedback
Answer / anand
bwlow 1 ohm
|Is This Answer Correct ?||35 Yes||7 No|
Answer / anilram
for perfect earting it should be zero ohms. for pratically
at site it 1-5 ohms . in large substations the should be
below one ohm
|Is This Answer Correct ?||22 Yes||3 No|
Answer / seth roosevelt dabri
it is between o - 0.5 ohms in large substations the should be
below one ohm
|Is This Answer Correct ?||10 Yes||2 No|
Answer / sreenu
IT'S ABOUT THE RANGE LIKE 0.7 TO 0.8 . DUE TO COMPONENTS
PRESENT IN EARTH.
|Is This Answer Correct ?||16 Yes||10 No|
Answer / jan
No fixed rule. depends upon site. better keep it as low as
possible else high touch/step voltage
|Is This Answer Correct ?||6 Yes||2 No|
Answer / syed qamar abbas
The ideal value of earth resistance allowed is 1 ohm or less
for equipment's body earthing or grounding like generator,
Main distribution boards , motors etc. On other hand the
value of earth resistance allowed for lightning protection
system is 10 ohms (ideal)
|Is This Answer Correct ?||8 Yes||5 No|
Answer / bilal descon
1 ohm is ideal, but thats depend from place to place.
Near desert ares its more up to 20 ohm, but normally
betweem 0 to 25 ohm is acceptable
|Is This Answer Correct ?||10 Yes||8 No|
Answer / sethu
perfect earth value - 1.5 ohm
lighting arrest earth value - 1.7 ohm
|Is This Answer Correct ?||2 Yes||1 No|
Answer / anubhav gupta
Resistance of earth should be zero but it can't possible. however, according to NFPA &IEEE the resistance of earth is 5 our less
|Is This Answer Correct ?||1 Yes||0 No|
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