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Joined: Oct 2000
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Seems that one of our clients decided to relocate their air compressors (Ingersoll-Rand screw type) and poured a nice, thick concrete pad on the south side of their mill. The 2" conduit LB feeds conveyors just beyond that new pad. I guess that's how they make sure that they don't dig up the conduit with a backhoe?
-Ohm_Boy ![[Linked Image]](https://www.electrical-contractor.net/Forum/Images/Concrete_lb.jpg)
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Joined: May 2004
Posts: 697
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Joined: Oct 2004
Posts: 7
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Yep. I figure it's wire-tight now, too. Although I suppose that as long as we can get a porta-band in there, it's still servicable, right? Anyone know if the code requires that both screws actually be in the removable portion of a cover?
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Joined: Apr 2001
Posts: 518
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Actually, my concern is that most LB's are made of zinc, or aluminum, neither of which will long withstand being eaten up by the alkali in the concrete. I do not believe that such bodies could ever be listed for such burial.
The LB must be "accessible." As NEC defined, that does not include the use of a jackhammet to reach it.
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Joined: Oct 2004
Posts: 7
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most LB's are made of zinc, or aluminum This one is PVC. On the brighter side, we can cut and glue it indefinitely. ![[Linked Image]](https://www.electrical-contractor.net/ubb/smile.gif) )
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Joined: Dec 2000
Posts: 4,293
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neither of which will long withstand being eaten up by the alkali in the concrete. ![[Linked Image]](https://www.electrical-contractor.net/ubb/wink.gif) Thank goodness they used asphalt on this one ![[Linked Image]](https://www.electrical-contractor.net/forum/el/lbug.jpg)
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Joined: Oct 2004
Posts: 7
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Hmmm... so "LB Paving" a popular practice, I see. I feel so much better now.
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Joined: Jul 2003
Posts: 394
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Was that a code required "encasement"?
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Joined: Apr 2001
Posts: 518
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Here, I go through the trouble of writing a brilliant post, and you guys have to spoil it by pointing out a few details (PVC, Asphalt) that let the air out of my balloon....
Don't you just hate it when that happens?
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Posts: 34
Joined: June 2004
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