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What would be nifty, is if the chase was at the angle of the roof,
so that its top edge was level. Then instead of being a trip hazard
it could be a step.<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>
<div class="moz-cite-prefix">On 8/14/2015 10:18 AM, Jerry Shafer
wrote:<br>
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<div>How ever its done conduit or channel we really need to
reduce the trip hazard between sub arrays, It does not matter
if its enphase or string inverters keeping the conduit from
this hazard should be on the list of "To Do's" also<br>
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Jerry<br>
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<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Aug 11, 2015 at 12:19 PM,
August Goers <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:august@luminalt.com" target="_blank">august@luminalt.com</a>></span>
wrote:<br>
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<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>
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