<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>my 2 cents - As I understand it we need to consider both the Solar Panel and the inverter.</div><div><br></div><div>The use of a TL inverter requires the solar panels to be ungrounded which means that neither the Pos or Neg conductors from the solar panel are grounded and therefore no White wire.</div><div><br></div><div>We can also use a ungrounded panel on an inverter with a transformer but the color requirements are the same since there are no grounded conductors there are to be no white wires.</div><div>An example is the newer Sunpower Panels that are non polarized (neither pos or neg grounded) which can be used with standard transformer inverters. </div><div><br></div><div>Make sense?</div><div><br></div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div><p class="MsoNormal"><i><span style="font-size: 10.5pt; color: black; ">Al Frishman</span></i><span style="font-size: 13.5pt; color: black; "><br></span><span style="font-size: 13.5pt; color: rgb(3, 1, 0); ">Aeon</span><span style="font-size: 13.5pt; color: rgb(255, 151, 0); ">Solar</span><span style="font-size: 13.5pt; color: black; "></span></p><p class="MsoNormal"><i><span style="font-size: 10.5pt; color: black; "><a href="tel:%28917%29%20699-6641" value="+19176996641" target="_blank">(917) 699-6641</a> - cell</span></i><span style="font-size: 10.5pt; color: black; "><br></span><i><span style="font-size: 10.5pt; color: black; "><a href="tel:%28888%29%20460-2867" value="+18884602867" target="_blank">(888) 460-2867</a></span></i><span style="font-size: 10.5pt; color: black; "><br></span><i><span style="font-size: 10.5pt; color: black; "><a href="http://www.aeonsolar.com/" target="_blank">www.aeonsolar.com</a></span></i></p></div></span>
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<br><div><div>On Sep 23, 2013, at 3:59 PM, Ray Walters wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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<div class="moz-cite-prefix">Hi Marco;<br>
<br>
Article 200.7 specifically prohibits using white wire for anything
but grounded conductors. This came up last year on a large
project with an ungrounded array, that also had white incorrectly
specified in the plans. The appropriate colors would be red for
positive, and black for negative. <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 9/23/2013 1:27 PM, Marco Mangelsdorf wrote:<br>
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<div class="Section1"><p class="MsoNormal">Hi all,<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">We’re doing more and more installs with TL
inverters
(SMA and P1).<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I’m using double-insulated wire from the
array string
to the first enclosure, as in j-box, and then transitioning to
standard
THHN/THWN wire.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I recently purchased some of that #10
double-insulated wire,
getting a spool of black and white.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Then after receiving the two spools it
occurred to me: since
the array is ungrounded, as far as there being no grounded
conductor in the circuit,
did I blow it by getting a spool of white wire?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">What sayeth you all? Can I not use that
white wire in
those array circuits for TL inverters?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Thanks,<o:p></o:p></p><p class="MsoNormal">marco<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p>
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