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#36272 - 04/02/04 07:32 PM Proper Grounding  
Merlin  Offline
Member
Joined: Jan 2004
Posts: 170
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 07:57 PM Re: Proper Grounding  
Roger  Offline
Member
Joined: May 2002
Posts: 1,716
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. [Linked Image]

Roger


#36274 - 04/03/04 05:28 AM Re: Proper Grounding  
pauluk  Offline
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Joined: Aug 2001
Posts: 7,520
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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