What is the normal earth resistance?




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 ?    21 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 1 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 4 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 7 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

Answer / giridhar

it is between 25-30ohms when soil is dry.when the soil is
wet it falls to below 4.

Is This Answer Correct ?    4 Yes 7 No

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