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Rather than use 3" pipe for the run, you could use reducing bushings
in a 3" LB and use it with a 2 1/2" conduit. <br><br>
<br>
At 12:47 PM 8/14/2010, you wrote:<br><br>
<blockquote type=cite class=cite cite="">The lesson was that even if,
say, for a 2 ˝ “ conduit says three 350 MCMs are OK, that doesn’t mean
that a 2 ˝” LB I was planning on using is rated for three 350s.<br>
<br>
For the first time ever I saw printed in the LB itself the specified max
conduct size, in this case 4/0 for a 2 ˝” LB.<br>
<br>
So for this short conduit run I upsized everything to 3”.<br>
<br>
I looked at the Thomas and Betts spec sheet kindly supplied by Ratico on
their LB offerings and there was no notation of max conductor sizes that
I could find.<br>
<br>
marco <br>
<br>
Marco,<br>
I'm curious to know what you did after the "hard" lesson. Was
it an issue of difficult/impossible installation, or an AHJ issue? It
seems like the most straightforward solution in a situation like this is
to replace your conduit bodies (LBs in this case) with a larger size, and
then install reducers in order to leave the existing conduit runs intact.
I'm looking at an upcoming installation where I would like to use
1-1/4" EMT, but will need 1-1/2" conduit bodies to be ok with
wire fill. <br>
<br>
-Hans<br>
<br>
<hr>
<div align="center"></div>
<b>From:</b> re-wrenches-bounces@lists.re-wrenches.org
[<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" eudora="autourl">
mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of
</b>Marco Mangelsdorf<br>
<b>Sent:</b> Thursday, August 12, 2010 8:19 PM<br>
<b>To:</b> 'RE-wrenches'<br>
<b>Subject:</b> [RE-wrenches] Aluminum conduit LBs<br>
Anyone know where I could go to find out the max conductor sizes that
threaded Al. LBs can handle?<br>
<br>
I learned the hard way that a conduit of X inches that can handle
conductors of a certain size does not necessarily mean that a LB of the
same diameter can handle the same size conductors.<br>
<br>
Thanks,<br>
marco<br>
<br><br>
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