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Old 08-21-2011, 07:18 PM   #1
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Can I screw a PVC body directly into wood?


Carlon's PVC j-boxes have mounting holes, but the LB bodies do not. Can I drill a hole into the body amd secure it to the adjacent sub-floor (I'm attaching from below)?

I think it's important to do this because the body will be the last piece, and subsequently the supporting piece, for the roughly 15-foot vertical section running from the basement (where the piece in question will be) to the attic.

The LB body (1-1/2") will be right next to a 6x6x4 box, which, if I don't screw in the LB body, will be the last screwed-in piece before the vertical run.

Ultimately, I want to know if it's code to put a metal screw in the body.

Thanks for your time.

Chris


Last edited by iceclimber2001; 08-21-2011 at 07:19 PM. Reason: Additional information.
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Old 08-21-2011, 07:38 PM   #2
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Can I screw a PVC body directly into wood?


For what it's worth....I have.

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Old 08-21-2011, 07:39 PM   #3
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Can I screw a PVC body directly into wood?


This is a kinda grey area of the code.

A pipe strap before the LB and one on the pipe up in the attic would be sufficient.

I am assuming the pipe is fished in the wall. Right?
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Old 08-21-2011, 08:44 PM   #4
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Can I screw a PVC body directly into wood?


Yes, it is fished through the wall. I found a chase of sorts. There are virtually no opportunities to strap it to anything until the attic, which I haven't even broken into yet (although it's just the ceiling of a closet that's left to get through). I'll probably try to get a block of a 2x4, or whatever thickness needed, to attach that to a joist in the attic.

Or maybe It'll perfectly align with an attic joist... and I'll win Powerball this week.
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Old 08-21-2011, 10:24 PM   #5
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Can I screw a PVC body directly into wood?


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Originally Posted by Missouri Bound View Post
For what it's worth....I have.
Me too.

It probably violates the UL listing, but I think that'd be awfully nit-picky.
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Old 08-22-2011, 07:26 AM   #6
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Can I screw a PVC body directly into wood?


http://www.iaei.org/magazine/2006/01...-with-the-nec/

Conduit bodies are permitted to be supported by rigid and intermediate metal conduit, EMT, and rigid nonmetallic conduit, as appropriate, in accordance with the exceptions in NEC 314.23 (E) and (F).

It doesn't say you can't screw the conduit body into wood, but it says it must be supported by conduit that is supported according to code.
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Old 08-22-2011, 02:47 PM   #7
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Can I screw a PVC body directly into wood?


I screw through the back of PVC LB's all the time and am not ashamed to admit it.
IMO a screw through PVC is self-sealing, and it assures the LB stays straight and clean looking.

That said, I think it is a technical violation as well.
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Old 08-22-2011, 03:40 PM   #8
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Can I screw a PVC body directly into wood?


Quote:
Originally Posted by Speedy Petey View Post
I screw through the back of PVC LB's all the time and am not ashamed to admit it.
IMO a screw through PVC is self-sealing, and it assures the LB stays straight and clean looking.

That said, I think it is a technical violation as well.
Me too. Similar to drilling an outside one for drainage, grey area.
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Old 08-22-2011, 08:14 PM   #9
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Can I screw a PVC body directly into wood?


I found something in a 2011 guide that made it sound like it wasn't cool (non-code). I think I can secure one end using a 1-1/2 or 2" strap (can't remember which I bought after sizing it up). The glue and securing methods in the attic will have to suffice. I'm not worried that it will fail or cause any stress on the system whatsoever, if I pay attention to what I'm doing. "Above code" is my philosophy. Thank you, Mr. Cauldwell.
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Old 08-23-2011, 12:23 AM   #10
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Can I screw a PVC body directly into wood?


I have done the same thing in both Américiane and European verison of LB fitting I know c'est a techanal voliation however some situation you have no choice but do it and my inspector did not say too much on that part.

Merci.
Marc

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