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Common EGC for circuits in PVC raceway #211878
11/20/13 12:15 AM
11/20/13 12:15 AM
G
George Little  Offline OP
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
Can I use the same EGC for running a 20a 120v.circuit and a 20a 277v. circuit in a PVC raceway? Code reference please if available.


George Little
2017 / 2014 NEC & Related Books and Study Guides
Re: Common EGC for circuits in PVC raceway [Re: George Little] #211881
11/20/13 02:26 AM
11/20/13 02:26 AM
S
sparkyinak  Offline
Member
Joined: Jul 2007
Posts: 1,335
Alaska
Yup


"Live Awesome!" - Kevin Carosa
Re: Common EGC for circuits in PVC raceway [Re: George Little] #211884
11/20/13 03:50 AM
11/20/13 03:50 AM
G
gfretwell  Online Content

Member
Joined: Jul 2004
Posts: 9,253
Estero,Fl,usa
If they are coming from the same service I think a single #12 would do it. 250.122(C)


Greg Fretwell
Re: Common EGC for circuits in PVC raceway [Re: George Little] #211886
11/20/13 01:47 PM
11/20/13 01:47 PM
T
twh  Offline
Member
Joined: Mar 2004
Posts: 947
Regina, Sask.
Can you run circuits from two different panels in the same conduit?

Re: Common EGC for circuits in PVC raceway [Re: George Little] #211888
11/20/13 04:13 PM
11/20/13 04:13 PM
S
Steve T  Offline
Member
Joined: Feb 2001
Posts: 306
Oak Park, IL, USA
Up to 600v you can combine circuits of different systems in the same raceway provided they are all insulated for the highest voltage-- 300.3(C).

Since a metal raceway would be allowed as the EGC for the 120v and 277v circuits, and I find no language that prohibits it, a single conductor EGC would be allowable as well. Circuitwise, the pipe and conductor work the same way.

Re: Common EGC for circuits in PVC raceway [Re: George Little] #211890
11/20/13 07:34 PM
11/20/13 07:34 PM
G
George Little  Offline OP
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
The issue seems to be, if you are coming out of two different panels, which you would be, is it proper or necessary to make a three wire splice of the ECG at the common J-box and run a separate wire from there to each panel. I say yes.


300.3(b)


George Little
Re: Common EGC for circuits in PVC raceway [Re: George Little] #211891
11/20/13 08:09 PM
11/20/13 08:09 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,997
Brick, NJ USA
George:
It sounds like you have a EGC with each circuit, going to the j-box, correct?

Then, IMHO, all the EGCs should be spliced together at that point.


John
Re: Common EGC for circuits in PVC raceway [Re: George Little] #211892
11/20/13 08:11 PM
11/20/13 08:11 PM
G
George Little  Offline OP
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
That's correct John, and I believe that the way it should be.


George Little
Re: Common EGC for circuits in PVC raceway [Re: George Little] #211898
11/20/13 10:13 PM
11/20/13 10:13 PM
S
Steve T  Offline
Member
Joined: Feb 2001
Posts: 306
Oak Park, IL, USA
If you had a metal raceway, that's the way it would be too, so I had imagined it the same way you are describing. If you ran separate EGCs for the whole run, you'd still have to bond them to the metal boxes, so they would be bonded together at that common point anyways.

Re: Common EGC for circuits in PVC raceway [Re: HotLine1] #211917
11/23/13 12:26 AM
11/23/13 12:26 AM
S
sparkyinak  Offline
Member
Joined: Jul 2007
Posts: 1,335
Alaska
One grounding conductor per conduit sized for the largest circuit within the conduit Doesn't matter if its six different systems in it. Only exeception is isolated grounding. In a ground fault in a properly grounded system the fault will go back to the panel with that supplied the fault. Each service if grounded properly is bonded together for zero potential. So no one becomes a bonding jumper themselves


"Live Awesome!" - Kevin Carosa

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