Posted by Greg K on April 27, 2012 at 19:50:19 from (75.105.32.39):
In Reply to: Electrical question posted by Stephen Newell on April 27, 2012 at 19:35:30:
There actually is a special tester that measures the resistance to ground through a ground rod. They happen to be very expensive I am told and I know of no inspectors or businesses that own one although I am sure someone somewhere does. The local standing is that you do not need to drive more than 2 ground rods to make up for the poor grounding capabilities of the ground (if 2 doesn't do it a dozen won't either). So it is cheaper to just drive a second ground rod rather than invest in an expensive tester.
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