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Contactor in a pull box #195248 07/21/10 08:42 PM
Joined: Nov 2002
Posts: 244
W
wewire2 Offline OP
Member
Is there a code provision that prevents the use of a 3R pullbox to enclose a 480V. 3 pole contactor? I need to order this ASAP and can't find anything on it.

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Re: Contactor in a pull box [Re: wewire2] #195249 07/21/10 08:57 PM
Joined: Mar 2003
Posts: 849
Y
Yoopersup Offline
Member
Is this being used also as a pull box?? Or just a 3 R junction box being used to enclose the Contactor?? If its the latter then I;d say its done all the time.

Re: Contactor in a pull box [Re: Yoopersup] #195255 07/22/10 07:57 AM
Joined: Jan 2005
Posts: 5,316
renosteinke Offline
Cat Servant
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I've done it as a mater of routine .... but some folks have run into issues with their AHJ - who wants a hinged door.

IMO, there's no code issue, and trying to apply 'listing and labeling' is quite a stretch. Heck, I've even had folks object to cutting holes in the boxes, rather than using the factory KO's. Go figure.

Re: Contactor in a pull box [Re: renosteinke] #195257 07/22/10 08:25 AM
Joined: Apr 2002
Posts: 7,233
HotLine1 Offline
Member
As Reno said, it's routine. Contactors/relays in NEMA1 are also routine (in compliant locations) as using any other enclosure.

Could the issue be the 'opinion' that the complete assembly is not 'listed/labeled'? Or could there be an issue with conductor volume, or bend radius?



John
Re: Contactor in a pull box [Re: HotLine1] #195261 07/22/10 04:31 PM
Joined: Nov 2002
Posts: 244
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wewire2 Offline OP
Member
It's just that I had an inspector in the LA area tell me I couldn't enclose a contactor in a pull box because the box wasn't listed for that use. It was a long time ago and I never did find the code section. I guess it doesn't exist.
Thanks for the help!

Re: Contactor in a pull box [Re: wewire2] #195265 07/22/10 09:59 PM
Joined: Apr 2002
Posts: 7,233
HotLine1 Offline
Member
OK, try this scenario...

Enclosure has a UL label/listing as a pull or junction box, based on the UL White Book? If that is/was the case then by the 'book' he's technically correct.

Did the enclosure you used have a backplate? Mounting studs?

Did you have a Sq D (or other mfg) that has a 'factory' enclosure in their catalog?

From your last post, sounds like that AHJ may have had a UL White Book with him


John
Re: Contactor in a pull box [Re: HotLine1] #195269 07/22/10 11:32 PM
Joined: Nov 2002
Posts: 244
W
wewire2 Offline OP
Member
It was just a regular pull box with the contactor mounted using tech screws. I see what you're getting at though. If there is a specific box made for that contactor then it seems
reasonable that the inspector would want the approved box to be used. In this case I'm looking at a 5 day lead time if I want it in a specialized contactor box. Uhggg!!

Re: Contactor in a pull box [Re: wewire2] #195277 07/23/10 08:23 AM
Joined: Apr 2002
Posts: 7,233
HotLine1 Offline
Member
We:

"mounted using tech screws" ??

That could have been a factor.


John
Re: Contactor in a pull box [Re: HotLine1] #195280 07/23/10 02:06 PM
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Posts: 244
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wewire2 Offline OP
Member
I have one of those Greenlee tap kits now. Boy those are sure nice with the all in one drill and tap.

Re: Contactor in a pull box [Re: wewire2] #195281 07/23/10 02:57 PM
Joined: Jul 2004
Posts: 9,569
G
gfretwell Offline
Member
What is the code issue with tek screws?


Greg Fretwell
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