Ground rod resistance


Old 05-04-04, 02:51 PM
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Ground rod resistance

Is there a simple way to measure the resistance of a grounding electrode? I understand that the code requires 25 ohms or less. Many thanks.
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Old 05-05-04, 04:21 AM
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ground rod resistance

Are you being required to show certification of the ground rod?
Old 05-05-04, 05:09 AM
jughead's Avatar
Join Date: Oct 2003
Location: Davenport, Iowa
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There are ways to measure the effectiveness of a ground system but it takes special equipment to obtain a meaningfull reading.
Old 05-05-04, 05:37 AM
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Join Date: Dec 2001
Location: New York
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You would need a special meter.
The code only requires 25 ohms or less if you have only one rod. There is no resistance max if you drive a second rod.

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