Answer / jaydeep parmar

value of the earth pit should be less then 2 ohm and earth grid value should be <1 ohm

Answer / tauseef tarique, engineer(e)

The earth resistance value can be checked by the use of
earth resistance tester (called megger earth tester). The
best earth resistance should be less than one ohm but the
permissible value is less than 5 ohm. For rocky areas it
should be less than 8 ohms.

Answer / pandiyarajan

Grid resistance value should be lessthan 1 ohm

Answer / aruna devi

By using earth megger .It should be less than 2ohm.

Answer / ramniveth

as per the IEEE standards it should be less than 1 Ohms

Answer / bhavini

earth tester use for measuring resistance of earth pit
should be less than 1 ohm.

Answer / praveen kumar jain

As such there is no any standard of earth resistance value,
Its varies on different type of soil resistivity. Idley it
should be 0, but in different kinds of soil for electrical
equipment it should be better to below 10 Ohms and for
electronic equipment it should be better to below 5 ohms.

Answer / ramaraj.g

The earth resistance value can be checked by the use of
earth resistance tester (called megger earth tester). The
best earth resistance should be less than one ohm but the
permissible value is less than 5 ohm. For rocky areas it
should be less than 5 ohms.

we using the DMM in check the L - N , N- E ,E- L
this small calc
L-N - 230 v
N-E - BELLOW THE 2 VOLTS IS GOOD ERATH CONN
E-L - 230v IS RECONFORM TO GOOD EARTH OR NOT
L-N = E-L

Answer / bk sharma

It should be near <0.5 ohm for good earthing.

Answer / bhanu

earth testers are used. and it is checked wheathe earh
resistance range is from 1-2 ohm or not.

I have c license but I don't know eligibility of Max Kilo Volts under the electrical licensing board.

0 Answers   MindSquare, Sical,

Dear Sirs, I am a technical persons.In one of our Electrical Sub- Station, We have installed three numbers of 1250KVA ,11KV/0.415KV Transformer to feed the Factory load. We have found some abnormality. In one of our Transformers the leakeage current from transformer body to earth through earth continuity wire is almost 86 Amp but in other transformer it is (5-10)Amp. where the load current on three phase and neutral are respectively 1360Amp,1400Amp,1370 Amp & 176Amp. So please any technical person help me about the reasons of this situation and how I can rectify the fault. Moreover,I have measured the earth resistance of the Earth continuity wire which is less than 1 Ohm. Thanks Tapas Barua

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