Subpanel next to main panel in house - grounding

[Marcus Waddell]

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.

 

[Reach4]

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.

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.

 

[Sponsor]

 

[Stuff]

Yes, you need to separate the grounds and neutrals. It is simple and code to use either a 3 wire plus ground cable or wires in conduit. Nothing more is needed.
See 5th diagram: https://www.doityourself.com/forum/electrical-ac-dc/495452-sub-panel-diagrams.html
Multiple codes in the NEC apply to this. Article 250 is about grounding and bonding.

 

[Marcus Waddell]

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.

 

[Stuff]

Correct. In same structure you don't ground the panel outside of the ground wire connecting panels.

 

[Marcus Waddell]

Correct. In same structure you don't ground the panel outside of the ground wire connecting panels.

Excellent, thanks for the help.