ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#165461 - 06/28/07 07:41 AM SE conductor extension
bman Offline
Member
Registered: 07/07/06
Posts: 20
Loc: or
Have a 1200A 480V service board in dedicated electrical room. Would like to tap bus and extend conductors via conduit out top of said board across ceiling and terminate into fused SE rated disconnect switch. Installation would meet depth of working clearance and 25' tap rule. Concern is art. 230.70. Is this code legal?
Top
2017 / 2014 NEC & Related Books and Study Guides
#165469 - 06/28/07 09:18 AM Re: SE conductor extension [Re: bman]
gfretwell Online   content


Member
Registered: 07/20/04
Posts: 9039
Loc: Estero,Fl,usa
230.70(A) means whatever your AHJ says it means and you have to ask him. I don't think what you say will fly but that is a 3000 mile away opinion.
_________________________
Greg Fretwell
Top
#165474 - 06/28/07 10:34 AM Re: SE conductor extension [Re: gfretwell]
resqcapt19 Offline
Member
Registered: 11/10/00
Posts: 2148
Loc: IL
Even if 230.70(A)(1) is not a problem, 230.72(A) may be. I would not consider a service disconnet on a different wall as being grouped with the other disconnect(s).
_________________________
Don(resqcapt19)
Top
#165475 - 06/28/07 11:22 AM Re: SE conductor extension [Re: resqcapt19]
Elec N Spec Offline
Member
Registered: 07/06/06
Posts: 33
Loc: Rochester Hills, MI USA
Your AHJ may have a problem with 110.3 (B). You are tapping or altering a piece of listed equipment. The manufacturer of the equipment may void it’s listing if it is altered in anyway.

Regards,


Elec N Spec
Top
#165477 - 06/28/07 01:42 PM Re: SE conductor extension [Re: Elec N Spec]
ghost307 Offline
Member
Registered: 05/09/05
Posts: 900
Loc: Chicago Illinois USA
110.3(B) can bite you in the butt.
If you modify the bus in the field, the UL Listing is no longer valid; even if the manufacturer blesses your method.
If you decide to go ahead, you should plan on paying UL for a field inspection to certify that the board retains its UL Listing. Otherwise the AHJ can turn down the whole job.
_________________________
Ghost307
Top
#165478 - 06/28/07 01:52 PM Re: SE conductor extension [Re: ghost307]
Elec N Spec Offline
Member
Registered: 07/06/06
Posts: 33
Loc: Rochester Hills, MI USA
I have enforced this. That is why I brought it up.

Elec N Spec
Top
#165480 - 06/28/07 02:05 PM Re: SE conductor extension [Re: Elec N Spec]
Tom Offline
Member
Registered: 01/01/01
Posts: 1044
Loc: Shinnston, WV USA
UL has specifically stated that unless the equipment is listed for a field tap using manufacturer supplied materials, then it would not be within the listing to tap the bus.
_________________________
Few things are harder to put up with than the annoyance of a good example.
Top
#165482 - 06/28/07 03:02 PM Re: SE conductor extension [Re: Tom]
HotLine1 Offline


Member
Registered: 04/03/02
Posts: 6778
Loc: Brick, NJ USA
Last time I ran into a similar situation....a phone call to the Mfg. (CH), a field engineer arrived, looked, measured, sketched. 24 hours later I had Eng. signed/sealed drawings, and costs.

Came time to install, Factory Field guys came, fabricated a few extra bends, and made it work.
AHJ at site, looked, took copy of drawings & cert., left Approval sticker & cut-in card.

BTW, the overall $$$ was not that bad, considering what they did, plus the install.
John

PS: The same services are available from other mfg's, you just have to track down the right contacts.
_________________________
John
Top
#165488 - 06/28/07 04:39 PM Re: SE conductor extension [Re: HotLine1]
bman Offline
Member
Registered: 07/07/06
Posts: 20
Loc: or
Thanks for the input. I have a call into the inspector, should hear back in the morning, will let you know what he says.
Top
#165521 - 06/29/07 01:38 PM Re: SE conductor extension [Re: bman]
Elec N Spec Offline
Member
Registered: 07/06/06
Posts: 33
Loc: Rochester Hills, MI USA
Good luck. You gents are on the ball. I am seeing more and more non-listed equipment, fixtures and devices out in the field and some contractors have been hurt badly by basing their bids on equipment that they can’t use. Some time a real bargain can cost you more than what you were planning to save in the first place.
Regards,
Elec N Spec
Top
Page 1 of 2 1 2 >

Member Spotlight
Member Since: 02/23/13
Posts: 204
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
1 registered (gfretwell), 40 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
Scotto, Freecrowder, clee512, Jdscott2005, FAIZAN

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals