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<DIV>August,</DIV>
<DIV> </DIV>
<DIV> I have made many a times a 1" or 3/4"
steel threaded coupling welded to a small pc of 3/16" X 1" X 3" long steel
(coming off at a right angle). The pc welded to the coupling has a 5/16"
hole in it to be able to use the DPW turn-bolt to secure it their rack just
inboard of the edge of the array. In one end of the coupling I install a
strain relief, the other a carflex fitting or EMT male adapter (TA)....I think
you get the rest. </DIV>
<DIV> </DIV>
<DIV> Its solid because the ends of the
conduit are bolted to the rack and of course you could secure midway if
necessary, no roof penetrations, usually. Of course this only works for
~4, 10 Ga. 'PV wire' size wires, but its one option. Could include a
pic but currently on vacation.</DIV>
<DIV> </DIV>
<DIV>Bill</DIV>
<DIV>Feather River Solar Electric</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=august@luminalt.com href="mailto:august@luminalt.com">August
Goers</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, August 11, 2015 3:19
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [RE-wrenches] wiring methods
between arrays</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal>Hi Wrenches,</P>
<P class=MsoNormal> </P>
<P class=MsoNormal>I have another best practices questions: what are you doing
to run your PV wire between arrays on a rooftops? This question has come up on
this list in the past but I’m still on the hunt for a robust and faster lower
cost method. We mostly install outdoor boxes on each sub array and then run
EMT between these boxes. We use strain reliefs to enter the boxes and then
either keep PV wire or transition to THWN-2 in the EMT depending on the
layout. This method takes time and the outdoor boxes aren’t cheap.
Alternatively, we can run open-ended EMT with ground bushings on the ends to
bond the conduit. Since ground bushings are designed to be used in boxes we
switch out the aluminum lug with a tin-coated outdoor rated lug and stainless
hardware. This technically violates the listing but at least the materials
hold up. The EMT needs to be carefully bent down at the ends so rain doesn’t
enter. Lastly, we sometimes run our PV wires along strut or angle aluminum
(this is the fastest method) which also needs to be bonded with a lay-in lug.
</P>
<P class=MsoNormal> </P>
<P class=MsoNormal>Does anyone have other methods?</P>
<P class=MsoNormal> </P>
<P class=MsoNormal>Best,</P>
<P class=MsoNormal> </P>
<P class=MsoNormal>August</P>
<P class=MsoNormal>Luminalt</P></DIV>
<P>
<HR>
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