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<div class="moz-cite-prefix">I just ran into this on a new Dasol 12
v module. I ended up wiring with USE but couldn't do the series
connections. I had to bring each module wire into a J Box. I'm
now using Kyocera, as that was a PITA. Since your project is low
amperage, have you considered smaller USE like 12 or 14 GA? I
actually even keep 16 and 18 AWG TC around for little modules.
The volt drop isn't as bad as you might imagine, and 18 awg
actually has a free air rating of 18 amps (crazy huh? though
240.4(D)1 limits it to 5.6 amps continuous.)<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
On 10/9/2013 11:48 PM, Allan Sindelar wrote:<br>
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Wrenches,<br>
I do a fair amount of work on ancient systems, just because
there's been off grid here for decades. I'm rewiring several old
arrays for my next door (meaning < 1/4 mile away) neighbor. The
particular array has six 53W Solec modules wired as three
two-module 24V pairs, on a Zomeworks tracker so old that it has
aluminum rails and attached freon canisters instead of the
integral square tubes. Both modules and tracker continue to work
well, but the wiring is so degraded from sun exposure that's it's
bare in spots, and this is what I want to fix.<br>
<br>
Each module has a tiny j-box - 3" x 3" x 7/8" deep. Each j-box has
a single 3/8" cord grip bushing (CGB). Each bushing has two #10
conductors coming out of the single hole in the CGB. The O.D. of
each wire is about the same as that of THWN. The problem is that
the single hole in the CGB is only large enough to fit this
diameter. USE-2 is too large, and modern PV wire is way too large.
<br>
<br>
I bought a dozen replacement 3/8" CGBs from Del City, but the
matching lock rings are too large to fit inside the j-boxes. I'd
be cautious about using a narrow Unibit to drill an additional
hole in each j-box anyway, given that the holes would be so close
to the backsheet. <br>
<br>
The easiest solution would be to find some sunlight-resistant,
wet-rated single-conductor wire in #10 or #12 that has an
insulation O.D. about the same as THHN/THWN. Any ideas, please?
Code is not an issue in this instance - I just want a solution
that works.<br>
<br>
I thought about using float switch cable, which is UV-resistant,
wet-rated, direct-burial-rated type TC. We keep plenty in stock
for signal circuits, and it fits and is strong. The problem is
that I need single conductors, because each module will have one
series conductor and one output conductor, and they run to
different locations. <br>
<br>
Are there any better ideas out there?<br>
Thanks, Allan<br>
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<p class="MsoNormal"><b>Allan <span class="SpellE">Sindelar</span></b><br>
<span style="font-size:10.0pt"><a
moz-do-not-send="true"
href="mailto:Allan@positiveenergysolar.com"><u><span
style="color:#000099">Allan@positiveenergysolar.com</span></u></a></span><br>
<span style="font-size:10.0pt">NABCEP Certified PV
Installation Professional<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder, <b>Positive Energy, Inc.<o:p></o:p></b></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">A
Certified B <span class="SpellE">Corporation<sup><span
style="font-size:7.5pt">TM</span></sup></span><br>
<st1:address w:st="on"><st1:street w:st="on">3209
Richards Lane</st1:street><br>
<st1:city w:st="on">Santa Fe</st1:city>, <st1:state
w:st="on">New Mexico</st1:state> <st1:postalcode
w:st="on">87507</st1:postalcode></st1:address><br>
<b>505 424-1112 office 780-2738 cell</b><br>
<a moz-do-not-send="true"
href="http://www.positiveenergysolar.com/"
target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></p>
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