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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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<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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