<div dir="ltr"><div><div>Wrenches<br></div>For some of our off grid customers we have installed the combiner on the array right behind the gimble and then only run the home run wire down, fewer wires is better. We try to keep the run in a loop 720` real close to the gimble, the loop reduces wire stress and we have had no failures. <br></div>Jerry<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 30, 2015 at 5:35 PM, Ray Walters <span dir="ltr"><<a href="mailto:ray@solarray.com" target="_blank">ray@solarray.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
We used to just bundle the PV cables and secure them close to the
pivot point at both the rack and the pole with insulated wire loom
clamps. We always made a big enough loop to handle full
articulation, but not too long so they wouldn't catch on the
Combiner box, etc. We also started using braided ground strap,
instead of stranded #6. Braided is made for movement, stranded #6
would strain harden and break off at the connector.<br>
I'm not sure how flex conduit would do. It definitely could break
out of a plastic J box, I would think. The back and forth motion
eventually wears out things not really made to move. I had lots of
trouble with this issue.<br>
Finally, don't be greedy on tracker settings, I'd keep the total
range of motion to less than a full 180 degrees Azimuth, and
probably limit the tilt some too. <br>
<pre cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
<a href="tel:303%20505-8760" value="+13035058760" target="_blank">303 505-8760</a></pre><div><div class="h5">
<div>On 11/30/2015 8:21 PM, Mac Lewis wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr">Hi Wrenches,
<div><br>
</div>
<div>I'm looking for advice on the best way(s) to secure PV
source circuit wiring on a dual axis tracker. I've never
wired one up before and it seems tricky. This particular
tracker is 12 modules, 3 strings. Is it best to run a
flexible conduit up the pole and leave plenty of excess
conduit to create large loops that fluctuate in size
throughout the day? What are some other ideas? How do you
avoid abrasion over time? </div>
<div><br>
</div>
<div>Thanks in advance<br clear="all">
<div><br>
</div>
-- <br>
<div>
<div><br>
</div>
<div><font color="#305A78" face="'times new roman', serif"><br>
</font></div>
<div><br>
</div>
Mac Lewis<br>
<br>
<span><b><font size="3" face="Arial, Helvetica, sans-serif">
<p align="left"><font color="#000000" face="Verdana,
Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé
que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p>
</font></b></span></div>
</div>
</div>
<br>
<fieldset></fieldset>
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