Designing an Earth Mat

Hello Nagaraj,

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Moose

Dear,

As per my knowledge, Earth matting for such a small installation of 500kva, where are the fault levels do not exceed more then 200 MVA, may not be strictly needed.

This will be applicable above the installations of 5 MVA wherein , step voltage during faults exceed the safe limits say 750 V with skin resistance of 25 K Ohms.

go to relevent IEC standard for design.for 415v system,earth mat is not neccessary,but standard flat,electrode shall be disign as per your soil resistivity.

This question has been raised and answered many times.Pl peruse form thread.