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#107295 10/19/04 11:10 PM
Joined: Oct 2000
Posts: 3,661
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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
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2017 / 2014 NEC & Related Books and Study Guides
#107296 10/20/04 07:12 PM
Joined: May 2004
Posts: 697
D
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Concrete-tight

#107297 10/20/04 07:49 PM
Joined: Oct 2004
Posts: 7
O
Junior Member
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?

#107298 10/20/04 08:49 PM
Joined: Apr 2001
Posts: 518
J
Member
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.

#107299 10/20/04 09:50 PM
Joined: Oct 2004
Posts: 7
O
Junior Member
Quote
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])

#107300 10/20/04 10:55 PM
Joined: Dec 2000
Posts: 4,287
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neither of which will long withstand being eaten up by the alkali in the concrete.

[Linked Image]Thank goodness they used asphalt on this one

[Linked Image]

#107301 10/21/04 12:32 AM
Joined: Oct 2004
Posts: 7
O
Junior Member
Hmmm... so "LB Paving" a popular practice, I see. I feel so much better now.

#107302 10/21/04 05:32 AM
Joined: Jul 2003
Posts: 394
B
Member
Was that a code required "encasement"?

#107303 10/21/04 10:47 PM
Joined: Apr 2001
Posts: 518
J
Member
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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