ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Photocell
by Docholiday. 01/22/18 10:52 AM
AreMetal Ladders Ever OK For Electrical Work?
by gfretwell. 01/22/18 01:15 AM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 14 guests, and 15 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
GEC with (2) 200AMP Main Disconnects #64705
04/12/06 05:31 PM
04/12/06 05:31 PM
S
ShockMe77  Offline OP
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
I'm taking over a job that someone else started and had a question about jumping a GEC from one main disconnect panel to another main disconnect panel. Both panels are 200 amps each and are side by side. As it is now, the one GEC that comes from the water main is terminated in one panel, and jumped out to the other panel. Something tells me this wrong and that the GEC should be "tapped" before entering either of the panels. I'm not sure wich article applies here. Any help would be appreciated.

Work Gear for Electricians and the Trades
Re: GEC with (2) 200AMP Main Disconnects #64706
04/12/06 06:22 PM
04/12/06 06:22 PM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
250.64(C) requires a continuous (unspliced) GEC unless spliced by an irreversible compression connector.
250.64(D) pemits taps to a GEC where multiple service enclosures are installed.

If you enter the first enclosure and then run a jumper to the second one, it could be argued that the GEC to the second one is not continuous because it is "extended" (to the second panel) without the use of an irreversible comnpression connector as required by 250.64(C).
On the other hand, entering the first enclosure with #2, then jumping to the 2nd enclosure with #4, seems no different than tapping onto a #4 with a mechanical connector, which is acceptable for the tap (but not a splice)
It seems easier to just run an appropriately sized GEC (#2) beneath or above each enclosure and tap on a #4 to each ground buss.

[This message has been edited by Redsy (edited 04-12-2006).]

[This message has been edited by Redsy (edited 04-13-2006).]

Re: GEC with (2) 200AMP Main Disconnects #64707
04/13/06 07:08 PM
04/13/06 07:08 PM
S
ShockMe77  Offline OP
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
Thank you, Redsy! That's exactly what I thought was the right thing to do, but I needed to know the article I was thinking of. I was looking past 250.66 for what I needed. The #4 copper to the water meter also needs to be upgraded to the appropriate size for the 300 amp feed at the meter pan. Thaks for your help, I really appreciate it.


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
CDS
CDS
Nicholson Ga
Posts: 34
Joined: June 2006
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
Potseal 15
sparky 15
Popular Topics(Views)
243,595 Are you busy
180,393 Re: Forum
170,862 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.016s Queries: 14 (0.004s) Memory: 0.9498 MB (Peak: 1.0739 MB) Zlib enabled. Server Time: 2018-01-22 18:18:23 UTC