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The calculation of earth (ground) rod resistances is one of the few instances where the North American and International standards have the same method of calculation. To simplify the calculation, I compiled the most commonly used formulas. As a note however, this does not include AC Substation Grounding as per IEEE Std 80 - IEEE Guide for Safety in AC Substation Grounding.

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Thank you sir I have download your Earthing Resistance Calculation

Thank you pangonilo, I have download your Earthing Resistance Calculation

how desied to provied to motor side earthing lead

The earthing resistance calculation is not displayed in the above box. Is it possible to mail me a sample calculation.

Thanks in advance

Sudheendra

Try this direct link to the earthing resistance calculation.