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Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
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ELectrician...NEC...ground wire.
Anyone have a copy of the NEC handy or know off the top of their head if the EMT can be used as the ground or does a ground wire need to be pulled to the outlet/switch.
Last edited by MotoSook; 05-14-2006 at 09:02 PM.. |
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05-14-2006, 07:34 AM
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Pull a seperate ground wire and make sure you bond the electrical box to it also.
JR
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05-14-2006, 08:00 AM
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Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
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JR, I would like to err on the safe side and just pull a separate wire, but technically, does the NEC allow the EMT to be used as the ground?
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05-14-2006, 08:06 AM
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Somewhere in the Midwest
Join Date: Oct 2001
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Just found out..NEC allows the EMT to be used as the ground, but most shops pull a separate ground in case one of the EMT connectors comes loose.
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05-14-2006, 08:23 AM
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250.118(4) lists EMT as suitable for equipment grounding means
358.60 Grounding. EMT shall be permitted as an equipment grounding conductor, (EGC). hope that helps 
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05-14-2006, 08:49 AM
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Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
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Excellent! There are a couple of circuits that I will pull a ground wire to, but the others I'll use the EMT to ground. Thanks for looking it up!
Last edited by MotoSook; 05-14-2006 at 12:33 PM.. |
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05-14-2006, 10:22 AM
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 this is a test.... Last edited by SLO-BOB; 10-22-2006 at 01:21 PM.. |
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05-14-2006, 11:16 AM
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Do yourself a favor and pull a separate ground. While NEC allows EMT to be used as a ground, you cant always trust your conduits mechanical connections to be secure, therefore compromising the conduits grounding capabilities.
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05-14-2006, 11:35 AM
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Pull a ground. Locknuts do come loose, then there goes your bond. Some jobs like hospitals have it in their specs to pull grounds with everything. I piped my home and pulled a ground though everything. Not much more labor or materials for peace of mind. Code does allow for conduit to be used as ground though.
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05-14-2006, 11:57 AM
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Suok,
Been out doing Mother's day stuff, so couldn't respond to your question. I own a construction company. I have never seen an electrical contractor fail to pull a ground wire, anywhere, on one of my jobs. There are a lot of reasons why you should pull a seperate ground wire but if you ever have voltage leave those pretty colored wires in the pipes and take up residence in your EMT, you will not soon forget it. There are a million ways to do something half-ass, so I can't say some people don't get cheap with the electrical wiring. Pull a seperate wire. JR
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05-14-2006, 01:17 PM
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this is a test.... Last edited by SLO-BOB; 10-22-2006 at 01:21 PM.. |
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05-14-2006, 02:01 PM
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Quote:
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05-14-2006, 05:04 PM
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Quote:
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05-14-2006, 05:34 PM
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this is a test.... Last edited by SLO-BOB; 10-22-2006 at 01:22 PM.. |
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05-14-2006, 05:51 PM
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this is a test.... Last edited by SLO-BOB; 10-22-2006 at 01:23 PM.. |
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05-14-2006, 06:01 PM
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if you're a homeowner doing the job yourself, pull the ground.
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05-14-2006, 06:14 PM
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Quote:
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05-14-2006, 06:18 PM
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this is a test.... Last edited by SLO-BOB; 10-22-2006 at 01:23 PM.. |
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05-14-2006, 06:40 PM
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Somewhere in the Midwest
Join Date: Oct 2001
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Well guys, thanks for the posts. I pulled a ground to all of the outlets and switches. #12 hot and neutral and #14 ground, easy to push throught 1/2 inch EMT in the garage (I'm wiring the detached garage I built this past winter..finally!).
We pulled #6 hot and neutral and #8 ground from the house panel to the sub panel in the garage. I have a 50 amp GFI breaker in the house panel (for 120 and 240 power in the garage). The screwy thing is that the sub panel I bought has no ground bus. So I guess I'll have to put a ground lug in the panel to connect the #8 ground (from the house) to the #14 grounds. I called my girlfriend's uncle who is an electrician (I forgot about him and to call him before I posted). He mentioned that NEC technically requires a ground rod for a detached building, but most inspectors let you pass if you share ground with the house. I had an electrician help, and I learned a few things...and although we still don't have lights in the garage, I think I'm OK to finish it all myself now....what a Mother's Day! I was running around all weekend and working in the rain and mud. I think I'll have it all wired and done tomorrow or the next day... Last edited by MotoSook; 05-14-2006 at 07:30 PM.. |
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05-14-2006, 06:40 PM
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this is a test.... Last edited by SLO-BOB; 10-22-2006 at 01:24 PM.. |
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05-14-2006, 06:44 PM
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