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j_sun 02-16-2013 04:12 PM

What to do w/ ground wire going into sub-panel
 
Hi,
I am in the process of replacing all the knt in my old home. Unfortunately that involves a lot of tearing out of plaster and other tedious things. To help with this process I need to temporarily drop a circuit out of a sub panel in my attic. This sub panel does not have a ground wire connecting it to the main panel. My question is what do I do with the ground wire in the romex I am running into the sub panel for my new circuit? Do I connect it to the neutral or cut it off? The main panel has the neutral and ground busses bonded and is properly grounded w/ ground rods.

Thanks.

stickboy1375 02-16-2013 04:13 PM

Quote:

Originally Posted by j_sun (Post 1118431)
Hi,
I am in the process of replacing all the knt in my old home. Unfortunately that involves a lot of tearing out of plaster and other tedious things. To help with this process I need to temporarily drop a circuit out of a sub panel in my attic. This sub panel does not have a ground wire connecting it to the main panel. My question is what do I do with the ground wire in the Rex I am running into the sub panel for my new circuit? Do I connect it to the neutral or cut it off? The main panel has the neutral and ground busses bonded and is properly grounded w/ ground rods.

Thanks.

What wiring method was used to feed this sub-panel?

j_sun 02-16-2013 04:15 PM

Quote:

Originally Posted by stickboy1375

What wiring method was used to feed this sub-panel?

It's the old style 10/3 romex w/o ground

stickboy1375 02-16-2013 04:16 PM

Quote:

Originally Posted by j_sun (Post 1118435)
It's the old style 10/3 romex w/o ground

I would replace the feeder going to that panel... no good with that setup. For temporary use, I would GFCI protect the original 10-3 NM if you plan on renovating that area at a later date.... Or just GFCI protect your new temp. circuit...

j_sun 02-16-2013 04:20 PM

Perfect. Thanks. I am planning on replacing the whole setup.

j_sun 02-16-2013 04:22 PM

Btw. What do you recommend I use for the new sub panel? I've got 100A new SquareD main panel with ample breaker space. The sub panel will likely feed 3-4 general lighting and receptacle circuits.

stickboy1375 02-16-2013 04:25 PM

Quote:

Originally Posted by j_sun (Post 1118446)
Btw. What do you recommend I use for the new sub panel? I've got 100A new SquareD main panel with ample breaker space. The sub panel will likely feed 3-4 general lighting and receptacle circuits.

just get a sq. d 8 circuit panel if you dont think you'll ever need the room...

ericmunyon12345 02-19-2013 01:42 PM

Quote:

Originally Posted by j_sun
Hi,
I am in the process of replacing all the knt in my old home. Unfortunately that involves a lot of tearing out of plaster and other tedious things. To help with this process I need to temporarily drop a circuit out of a sub panel in my attic. This sub panel does not have a ground wire connecting it to the main panel. My question is what do I do with the ground wire in the romex I am running into the sub panel for my new circuit? Do I connect it to the neutral or cut it off? The main panel has the neutral and ground busses bonded and is properly grounded w/ ground rods.

Thanks.

Re run the feed with 3 wire with ground. In the sub panel, the neutral bus bar should NOT be bonded to the panel.

j_sun 02-19-2013 01:45 PM

Hi All,
Thanks for the input. I ended pulling the correct wire from the main panel and installed a brand new SqD sub-panel. I figured if I was going to put some effort into now I might as well do everything the right way.

Jason


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