how to check the earth resistance value& what is the
minimum earth resistance for good earthing sysytem.
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Answer Posted / robeesh
Earth Resistance test to be conducted on summer conditions to achieve the correct value by using an earth resistance tester (From Megger/ Sanwa/ Fluke). The value should be less than 1 Ohm for electrical earth pits and less than 10 Ohm for Lightning protection System. Procedure for testing should be as per the equipment.
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