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<div class="moz-cite-prefix">The convention of red for positive and
black for negative is not just automotive. It is also used by all
battery based inverter manus, all battery companies, and all
multimeters.<br>
John Wiles also agrees; <br>
red = positive, black = negative for ungrounded systems<br>
red = positive, white = negative for negative grounded systems<br>
white = positive, black = negative for pos grounded systems.<br>
I take it a step further, and use white label tape with red
lettering that says "+ positive ground + ",<br>
because I've seen so many problems with positive grounded systems,
and people not getting polarity correct.<br>
All of this is NEC compliant, and follows standard conventions.<br>
Make it easy on yourself and your journeymen on a hot roof, and
have your color coding match their multimeter.<br>
You might save an inverter or even a life.<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 6/28/2013 12:09 PM, Allan Sindelar wrote:<br>
</div>
<blockquote cite="mid:51CDD170.8020800@positiveenergysolar.com"
type="cite">
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<div class="moz-cite-prefix">On 6/28/2013 11:47 AM, <a
moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:aram@aramsolar.com">aram@aramsolar.com</a> wrote:<br>
<blockquote
cite="mid:20130628104745.b57827851f1f1a43d2e57a598576ec83.77bf2235b3.wbe@email16.secureserver.net"
type="cite"><span style="font-family:Verdana; color:#000;
font-size:10pt;">
<div>And of course Red for positive and black for negative. </div>
<div>Most building departments have not pick up on this yet.
But they will. </div>
<div>Aram</div>
</span></blockquote>
<br>
Where does "of course Red for positive and black for negative"
come from, please? I only know it as an automotive standard that
has often caused confusion when used by DIY offgridders in years
past, as black thus could represent either positive or negative
in a DC conductor pair. <br>
Is there yet a convention for ungrounded arrays? While red and
black are technically correct as ungrounded current-carrying
conductors, use of this color convention could cause as much
confusion as resolve it in the future. How about "black and
black" or for that matter "yellow and orange" (if supplied by
manufacturers) for ungrounded arrays?<br>
Thanks, Allan<br>
<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 and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b>, a Certified B <span
class="SpellE">Corporation<sup><span
style="font-size:7.5pt">TM</span></sup></span><br>
3209 Richards Lane<br>
Santa Fe, New Mexico 87507<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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