ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
sparky 4
Recent Posts
Dimmable LED 2x4 lay in fixtures
by gfretwell. 12/13/17 09:49 PM
2017 NEC Changes
by sparky. 12/13/17 06:57 PM
Casino Wiring methods
by HotLine1. 12/09/17 10:44 AM
Ground wire Size to water Line.
by HotLine1. 12/05/17 12:11 PM
Flexible conduit to an outside Spa
by gfretwell. 12/05/17 12:28 AM
New in the Gallery:
Gallery Test
Popular Topics(Views)
243,044 Are you busy
179,480 Re: Forum
170,403 Need opinion
Who's Online Now
0 registered members (), 20 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#200399 - 03/30/11 07:33 PM Splice in service disconnect  
SJT  Offline
Member
Joined: Jul 2002
Posts: 241
PATCHOGUE, N.Y.
A 400amp main disconnect will need to be added outside a Building. Existing is a 400 amp main circuit breaker panel in the utility room. The Arc flash rating turned out to be a Cat. 4 for the Panel.(you have to wear a space suit) so by installing a Disconnect between the Panel and the transformer, the engineer says it will go to a category 2. This is fed from a pad mount transformer with the metering mounted on the outside. Can the feeders from the transformer be spliced in the disconnect if not long enough, to go to the line side of the switch? Or will we have to install a 2'x2' junction box. Existing, is the 4" LB going to the back of the Main Panel.
Sorry about the long story - Thanks, SJT


Work Gear for Electricians and the Trades

#200401 - 03/30/11 09:29 PM Re: Splice in service disconnect [Re: SJT]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,878
Brick, NJ USA
IMHO, run this past the local AHJ first. Also you may have to run it by the local POCO. 'Line' side may be POCO jurisdiction. Using barrel crimps should be acceptable.



John

#200432 - 04/01/11 09:06 AM Re: Splice in service disconnect [Re: SJT]  
harold endean  Offline
Member
Joined: Feb 2002
Posts: 2,233
Boonton, NJ
I'm sorry I only have my 2008 NEC with me, ( we are still on that code) but would 230.33 be of use in this case?


#200437 - 04/01/11 10:03 AM Re: Splice in service disconnect [Re: SJT]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,878
Brick, NJ USA
harold:
230.33 refers you to 110.14 regarding splicing methodology, and refers to 300.xx articles which I understand are not applicable in the OP.

I mentioned the local POCO, and AHJ for a few reasons. Here (PS) crimp splices are acceptable on a case by case basis, as they are by me, and most other AHJs. Extending an existing lateral feeder to terminate at the line side of a disconnect switch, in lieu of replacement of that feeder can be acceptable. Crimp splice; feeder in acceptable condition, and sufficient 'space' within the disco.



John

#200464 - 04/02/11 12:19 PM Re: Splice in service disconnect [Re: SJT]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,142
Estero,Fl,usa
I only had the "splice in the disco" come up once and I agreed to the irreversible crimp splice, simply because any alternative was very burdensome on the installer and I did not see any particular hazard. We were literally talking about a foot of wire.


Greg Fretwell

#200468 - 04/02/11 12:33 PM Re: Splice in service disconnect [Re: SJT]  
SJT  Offline
Member
Joined: Jul 2002
Posts: 241
PATCHOGUE, N.Y.
Thanks for the inputs,
I think I'll go with the barrel crimps, if the wires are not long enough.
SJT



Member Spotlight
Bill Addiss
Bill Addiss
NY, USA
Posts: 3,879
Joined: October 2000
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.013s Queries: 15 (0.003s) Memory: 0.7781 MB (Peak: 0.9277 MB) Zlib enabled. Server Time: 2017-12-14 18:44:50 UTC