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    tonyyy47's Avatar
    tonyyy47 Posts: 2, Reputation: 1
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    #1

    Mar 25, 2011, 11:16 AM
    Do you need to run a separate ground rod for a sub panel in a home
    The main panel already has 2 grd rods I'm running a 4 wire ser cable
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
    Printers & Electronics Expert
    		  
    #2

    Mar 25, 2011, 11:42 AM

    The answer is maybe.

    It depends on where the second panelboard will be.

    If it is within the same structure as the main service panel, then no a separate grounding system is not needed. You still have to keep Neutral and Ground isolated from each other on the second panel but you do not need a new ground rod.

    However, if you are installing the panelboard in a separate structure (garage, workshop) then the answer is Yes.

    Ground and Neutral must also be isolated from each other.
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