<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:'times new roman', 'new york', times, serif;font-size:12pt"><div>You might consider using a gutter in lieu of the LB or a junction box if the site conditions are conducive.</div><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><br><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><font size="2" face="Tahoma"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Marco Mangelsdorf <marco@pvthawaii.com><br><b><span style="font-weight: bold;">To:</span></b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b><span style="font-weight: bold;">Sent:</span></b> Sat, August 14, 2010 6:47:37 AM<br><b><span style="font-weight: bold;">Subject:</span></b> [RE-wrenches] Aluminum conduit LBs<br></font><br>
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<p class="MsoNormal"><span style="color:#1F497D;">The lesson was that even if, say,
for a 2 ½ “ conduit says three 350 MCMs are OK, that doesn’t mean
that a 2 ½” LB I was planning on using is rated for three 350s.</span></p>
<p class="MsoNormal"><span style="color:#1F497D;"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D;">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 ½” LB.</span></p>
<p class="MsoNormal"><span style="color:#1F497D;"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D;">So for this short conduit run I
upsized everything to 3”.</span></p>
<p class="MsoNormal"><span style="color:#1F497D;"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D;">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.</span></p>
<p class="MsoNormal"><span style="color:#1F497D;"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D;">marco </span><span style="font-size:10.0pt;font-family:"sans-serif";"></span></p>
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<p class="MsoNormal"> </p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"sans-serif";color:blue;">Marco,</span><span style="font-size:12.0pt;font-family:"serif";"></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"sans-serif";color:blue;">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. </span><span style="font-size:12.0pt;font-family:"serif";"></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"serif";"> </span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"sans-serif";color:blue;">-Hans</span><span style="font-size:12.0pt;font-family:"serif";"></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"serif";"> </span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt;"><b><span style="font-size:10.0pt;font-family:"sans-serif";">From:</span></b><span style="font-size:10.0pt;font-family:"sans-serif";"> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <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</span><span style="font-size:12.0pt;font-family:"serif";"></span></p>
<p class="MsoNormal">Anyone know where I could go to find out the max conductor
sizes that threaded Al. LBs can handle?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">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.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks,</p>
<p class="MsoNormal">marco</p>
<p class="MsoNormal"> </p>
<p><span style="font-size:10.0pt;font-family:"sans-serif";">No virus
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