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Grounding Reqs for 200A panel

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  • Grounding Reqs for 200A panel

    A large tree branch fell on the service drop for my house, so since the power is cut I replaced my 125A breaker panel with a 200A panel and I'm confused about how to ground the panel. It's a Homeline panel I picked up from Home Depot. The neutral bus grounds to the panel via the provided screw. There is a smaller lug directly next to the main lug on the neutral bus, is this where the ground wire terminates? Do I attach a larger lug to the grounding bar and terminate the ground wire there? Or both? There is a pre-drilled hole marked for ground, do I screw a lug in there to terminate the ground wire? What size wire is required for a 200A panel?

    1. How many grounds are required for a 200A panel?
    2. If two grounds are required,
    2a. Do I have to ground the panel to my plumbing for a secondary ground
    or can I use two separate grounding rods instead?
    2b. Do I terminate one wire at the smaller lug on the neutral bus and the
    other wire at the grounding bar?
    3. What size ground wire is required for a 200A panel?

    Your help would be greatly appreciated. Thanks.

  • #2
    Originally posted by RTK View Post
    A large tree branch fell on the service drop for my house, so since the power is cut I replaced my 125A breaker panel with a 200A panel and I'm confused about how to ground the panel. It's a Homeline panel I picked up from Home Depot. The neutral bus grounds to the panel via the provided screw. There is a smaller lug directly next to the main lug on the neutral bus, is this where the ground wire terminates? Do I attach a larger lug to the grounding bar and terminate the ground wire there? Or both? There is a pre-drilled hole marked for ground, do I screw a lug in there to terminate the ground wire? What size wire is required for a 200A panel?

    1. How many grounds are required for a 200A panel?
    2. If two grounds are required,
    2a. Do I have to ground the panel to my plumbing for a secondary ground
    or can I use two separate grounding rods instead?

    Two ground rods within a loop back to the panel neutral plus the water pipe ground

    2b. Do I terminate one wire at the smaller lug on the neutral bus and the
    other wire at the grounding bar?

    All to the neutral bar

    3. What size ground wire is required for a 200A panel?

    #4 bare copper

    Your help would be greatly appreciated. Thanks.
    check with your local supplier. some require grounding at the panelbox, others use the ground at the meter neutral bus.
    the ground shield on an SEU cable is twiasted around and terminates at the meter trough and panelbox's large lug. the grounding screw is used to bond the neutral bus to the enclosure through that threaded hole.

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    • #3
      Thanks HayZee, that helped.

      Comment

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