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Concrete LB #107295
10/19/04 10:10 PM
10/19/04 10:10 PM
Admin  Offline
OP
Administrator
Member
Joined: Oct 2000
Posts: 3,481
NY, USA
Quote
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]

2017 / 2014 NEC & Related Books and Study Guides
Re: Concrete LB #107296
10/20/04 06:12 PM
10/20/04 06:12 PM
D
Dave55  Offline
Member
Joined: May 2004
Posts: 697
Crystal Lake, Illinois, USA
Concrete-tight

Re: Concrete LB #107297
10/20/04 06:49 PM
10/20/04 06:49 PM
O
Ohm_Boy  Offline
Junior Member
Joined: Oct 2004
Posts: 7
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?

Re: Concrete LB #107298
10/20/04 07:49 PM
10/20/04 07:49 PM
J
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
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.

Re: Concrete LB #107299
10/20/04 08:50 PM
10/20/04 08:50 PM
O
Ohm_Boy  Offline
Junior Member
Joined: Oct 2004
Posts: 7
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])

Re: Concrete LB #107300
10/20/04 09:55 PM
10/20/04 09:55 PM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,264
Fullerton, CA USA
Quote
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]

Re: Concrete LB #107301
10/20/04 11:32 PM
10/20/04 11:32 PM
O
Ohm_Boy  Offline
Junior Member
Joined: Oct 2004
Posts: 7
Hmmm... so "LB Paving" a popular practice, I see. I feel so much better now.

Re: Concrete LB #107302
10/21/04 04:32 AM
10/21/04 04:32 AM
B
Big Jim  Offline
Member
Joined: Jul 2003
Posts: 394
Denver, CO USA
Was that a code required "encasement"?

Re: Concrete LB #107303
10/21/04 09:47 PM
10/21/04 09:47 PM
J
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
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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