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#115558 11/11/03 09:32 PM
Joined: Oct 2000
Posts: 3,682
Likes: 3
Admin Offline OP
[Linked Image]
The "electrician" decided to convert this 2" EMT LB into some type of 2" EMT LB LL 3/4!

Submitted by;

Scott Griffin
Griffin Electric Co., Inc.
Central New York

#115559 11/12/03 07:17 AM
Joined: Jan 2002
Posts: 1,457
This used to be called "Yankee inginuity" now it is a violation.

#115560 11/12/03 09:32 AM
Joined: Aug 2002
Posts: 1,081
Extra service charge for a custom installation...

#115561 11/12/03 07:33 PM
Joined: Oct 2003
Posts: 147
I have a question. Does the N.E.C allow splicing in LBs, can it be used as a general purpose junction box?

If yes, then I would call this "use of an LB as a juction box". This would bring up issues of internal box volume and maximum box fill. Removing the cover would probably reveal a code violation in these areas.

If No, then I would call this "modification of electrical equipment".(modifying a 2"LB to a 2"LB,LL3/4")

Does the N.E.C allow modification of electrical equipment without it being re-certified?

#115562 11/12/03 08:18 PM
Joined: Mar 2001
Posts: 333
Crash, an LB(conduit body) can contain splices, but the body can't be modified. The conduit body cubic inch capacity must be marked by the manufacturer in order to splice in it.

#115563 11/12/03 08:50 PM
Joined: Aug 2002
Posts: 1,691
How would such a violation be corrected?

I assume a special box is already sold for that type of configuration or a reducing connector? Or do you feed the fat pipe into a junction box first to tap into the thinner pipe and then from the box to the elbow?

If would you go about puting something like this together properly? [Linked Image]

Asking out of curiosity, not that I'm going to actually go out and do this for someone.... [Linked Image]

#115564 11/12/03 09:11 PM
Joined: Oct 2000
Posts: 5,392
i would imagine the conductors would need to be pulled out, and a proper JB installed

#115565 11/12/03 09:11 PM
Joined: Mar 2001
Posts: 333
Sven, a conventional junction box could be used. A tee condulet could also be installed in the horizontal run and the EMT rerouted over to it.


#115566 11/27/03 12:05 AM
Joined: Jul 2003
Posts: 141
What article of the NEC does that violate? We drill holes in other boxes, etc. If it doesn't overstuff the LB, it doesn't seem like a bad move to me...can somebody educate me on this one?

#115567 01/07/04 05:27 PM
Joined: Jan 2004
Posts: 91
your violation is probably in the UL listing
for the lb. you cannot modify its surface.

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