ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Where is Everyone?
by gfretwell - 04/09/21 01:08 AM
HI gang, long time since I was here...
by gfretwell - 04/09/21 01:02 AM
Lock-down Thread
by gfretwell - 04/06/21 09:30 PM
Portable Generator Grounding
by JoeTestingEngr - 03/14/21 03:48 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (Scott35), 11 guests, and 17 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Common EGC for circuits in PVC raceway #211878 11/20/13 12:15 AM
Joined: Jan 2004
Posts: 1,507
G
George Little Offline OP
Member
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
Joined: Jul 2007
Posts: 1,335
S
sparkyinak Offline
Member
Yup


"Live Awesome!" - Kevin Carosa
Re: Common EGC for circuits in PVC raceway [Re: George Little] #211884 11/20/13 03:50 AM
Joined: Jul 2004
Posts: 9,575
G
gfretwell Online Content
Member
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
Joined: Mar 2004
Posts: 947
T
twh Offline
Member
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
Joined: Feb 2001
Posts: 308
S
Steve T Offline
Member
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
Joined: Jan 2004
Posts: 1,507
G
George Little Offline OP
Member
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
Joined: Apr 2002
Posts: 7,237
HotLine1 Offline
Member
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
Joined: Jan 2004
Posts: 1,507
G
George Little Offline OP
Member
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
Joined: Feb 2001
Posts: 308
S
Steve T Offline
Member
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
Joined: Jul 2007
Posts: 1,335
S
sparkyinak Offline
Member
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

Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
sbi
sbi
indiana
Posts: 47
Joined: March 2008
Show All Member Profiles 
Top Posters(30 Days)
BigB 4
Popular Topics(Views)
277,435 Are you busy
211,165 Re: Forum
198,192 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3