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-   -   Adding new GFI circuit to existing sub panel. (http://www.diychatroom.com/f18/adding-new-gfi-circuit-existing-sub-panel-159865/)

spudgun 10-12-2012 05:50 PM

Adding new GFI circuit to existing sub panel.
 
Existing 100A sub panel is fed by three #4's in metal conduit. I presume the conduit is acting as the ground. I want to add two circuits that will need GFI protection:
1) Is the sub panel correctly grounded as is? -- (the existing feeds are hard piped also).
2) New circuits will be Romex and not in conduit. Do I need to add a grounding bar to the box for the GFI's or can their grounds share the neutral bar?

joecaption 10-12-2012 06:00 PM

Might want to post a picture of the panel with the cover removed for better ansewers.

Jim Port 10-12-2012 06:08 PM

Neutrals and grounds cannot share the same bar in a subpanel.

spudgun 10-12-2012 06:22 PM

Not sharing the same bar in a sub panel makes sense. Given that the box is grounded, when I add a second bar is it bonded (screwed) to the box like the neutral bar, or is it somehow isolated?


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