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SE conductor extension #165461 06/28/07 09:41 AM
Joined: Jul 2006
Posts: 20
B
bman Offline OP
Member
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?

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Re: SE conductor extension [Re: bman] #165469 06/28/07 11:18 AM
Joined: Jul 2004
Posts: 9,571
G
gfretwell Offline
Member
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
Re: SE conductor extension [Re: gfretwell] #165474 06/28/07 12:34 PM
Joined: Nov 2000
Posts: 2,148
R
resqcapt19 Offline
Member
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)
Re: SE conductor extension [Re: resqcapt19] #165475 06/28/07 01:22 PM
Joined: Jul 2006
Posts: 33
E
Elec N Spec Offline
Member
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

Re: SE conductor extension [Re: Elec N Spec] #165477 06/28/07 03:42 PM
Joined: May 2005
Posts: 984
G
ghost307 Offline
Member
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If you modify the bus in the field, the UL Listing is no longer valid; even if the manufacturer blesses your method.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
Re: SE conductor extension [Re: ghost307] #165478 06/28/07 03:52 PM
Joined: Jul 2006
Posts: 33
E
Elec N Spec Offline
Member
I have enforced this. That is why I brought it up.

Elec N Spec

Re: SE conductor extension [Re: Elec N Spec] #165480 06/28/07 04:05 PM
Joined: Jan 2001
Posts: 1,044
Tom Offline
Member
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.
Re: SE conductor extension [Re: Tom] #165482 06/28/07 05:02 PM
Joined: Apr 2002
Posts: 7,235
HotLine1 Offline
Member
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
Re: SE conductor extension [Re: HotLine1] #165488 06/28/07 06:39 PM
Joined: Jul 2006
Posts: 20
B
bman Offline OP
Member
Thanks for the input. I have a call into the inspector, should hear back in the morning, will let you know what he says.

Re: SE conductor extension [Re: bman] #165521 06/29/07 03:38 PM
Joined: Jul 2006
Posts: 33
E
Elec N Spec Offline
Member
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

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