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Joined: Nov 2002
Posts: 244
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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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Joined: Mar 2003
Posts: 849
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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.
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Joined: Jan 2005
Posts: 5,445 Likes: 3
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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.
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Joined: Apr 2002
Posts: 7,381 Likes: 7
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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
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Joined: Nov 2002
Posts: 244
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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!
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Joined: Apr 2002
Posts: 7,381 Likes: 7
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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
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Joined: Nov 2002
Posts: 244
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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!!
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Joined: Apr 2002
Posts: 7,381 Likes: 7
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We:
"mounted using tech screws" ??
That could have been a factor.
John
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Joined: Nov 2002
Posts: 244
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I have one of those Greenlee tap kits now. Boy those are sure nice with the all in one drill and tap.
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Joined: Jul 2004
Posts: 9,928 Likes: 34
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What is the code issue with tek screws?
Greg Fretwell
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Posts: 240
Joined: March 2005
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