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Thread: Ground rod, one or more?

  1. #1
    DIY Junior Member charp's Avatar
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    Default Ground rod, one or more?

    With ground rods is more the merrier or does that cause problems? I need to do some digging around the main panel at the street to see what's there and if there's a Ufer down at the house I don't know if I can find it. Is it advisable to add a ground rod at the house if there's already one at the street? Also, it's very dry here half the year which I've heard reduces the effectiveness of the ground.

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    It can take multiple ground rods to effect a decent ground plane. Not sure of the requirements.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    DIY Senior Member Chad Schloss's Avatar
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    from what i've read, you may need two ground rods 6' or 8' apart unless the first one measures below 25 ohms. I had my panel upgraded and the electrician installed two rods and bonded them to the equipment ground in the panel and the 3/4" copper water pipe that services the house.

  4. #4
    Electrical Contractor/Instructor jwelectric's Avatar
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    250.56 requires that there be 25 ohms or it must be two rods. If it is dry then two rods is the rule.

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