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#36272 - 04/02/04 03:32 PM Proper Grounding
Merlin Offline

Registered: 01/27/04
Posts: 170
Loc: NW Indiana
I just finished hooking up my new service to my home. As I was grounding the service disconnect panel, I got wandering. Is there a good way to check for a good ground at the ground rod.

In the past installations I have done, I use the reccomended ground rod for the soil type and area. (example - 5/8" x 10' for sand) If in doubt, I always go bigger. But is there a way to check to see if that is sufficient. Thanks, Kevin

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#36273 - 04/02/04 03:57 PM Re: Proper Grounding
Roger Offline

Registered: 05/18/02
Posts: 1779
Loc: N.C.
There are numerous ways to check the ground rod resistance, this can be a fall of potential test which uses somewhat expensive testers, it can be a clamp type meter, you can actually apply voltage and use an amprobe. The truth is, the required 25 ohms at the ground rod doesn't mean much at our voltage levels, and unless you are shooting for some "performance" level of grounding, you are better off just driving two rods and then head to the house.


#36274 - 04/03/04 01:28 AM Re: Proper Grounding
pauluk Offline

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
The traditional method used here for decades is the fall-of-potential method mentioned by Roger.

There's a description of it, along with other useful notes here. .


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