Subpanel next to main panel in house - grounding

Discussion in 'Electrical Forum discussion & Blog' started by Marcus Waddell, Apr 13, 2019.

  1. Marcus Waddell

    Marcus Waddell Member

    Joined:
    Aug 16, 2017
    Occupation:
    Project Manager
    Location:
    Marietta, GA
    Hey all,
    Thinking about putting in a subpanel right next to my main panel to feed some items for an indoor woodshop.
    I cannot seem to figure out if I need to separate the neutral and ground in a subpanel that is located right next to the main panel in my house. If I do, can I just run it to where the main panel grounds (i.e. the water pipes a couple of feet away)? Thanks for the help. **would also be nice if y'all know the specific part of the NEC that applies.
     
  2. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    You need to run a neutral and ground both to the main box. The subpanel will have ground and neutral separate. The main box will keep connected ground and neutral.

    I think no further ground rod is needed if the main box is to code, but you may need to upgrade to code for grounds. I am not sure. I am not an electrician. I have no code cites for you.
     
    Last edited: Apr 13, 2019
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  4. Stuff

    Stuff Active Member

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    Location:
    Pennsylvania
  5. Marcus Waddell

    Marcus Waddell Member

    Joined:
    Aug 16, 2017
    Occupation:
    Project Manager
    Location:
    Marietta, GA
    So basically just ground the sub panel to the main panel and separate the neutral and ground in the subpanel? I just did a subpanel to my shed, but it was over 100' away, so I did two ground rods. Was really hoping I didn't need to do the same thing here.
     
  6. Stuff

    Stuff Active Member

    Joined:
    Mar 7, 2013
    Location:
    Pennsylvania
    Correct. In same structure you don't ground the panel outside of the ground wire connecting panels.
     
  7. Marcus Waddell

    Marcus Waddell Member

    Joined:
    Aug 16, 2017
    Occupation:
    Project Manager
    Location:
    Marietta, GA
    Excellent, thanks for the help.
     
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