<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Check out <span>NEC<span id="GD__CURSOR"> </span></span>551.47.. Maybe... Good Luck.. db<br></div><div><br>Dan Brown<br>Foxfire Energy Corp.<br>Renewable Energy Systems<br>(802)-483-2564<br><a href="http://www.Foxfire-Energy.com">www.Foxfire-Energy.com</a><br>NABCEP #092907-44</div><div><br><br></div>
<blockquote id="replyBlockquote" webmail="1" style="border-left: 2px solid blue; margin-left: 8px; padding-left: 8px; font-size: 10pt; color: black; font-family: verdana;">
<div id="wmQuoteWrapper">
-------- Original Message --------<br>
Subject: Re: [RE-wrenches] Parallel wire runs to increase size<br>
From: Mick Abraham <<a href="mailto:mick@abrahamsolar.com">mick@abrahamsolar.com</a>><br>
Date: Wed, February 02, 2011 11:47 am<br>
To: RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
<br>
Hi, Larry~<br><br>If you convert from American AWG wire gauge sizes to "millimeters squared" units...you can add the "mm squared" values together, then convert back to AWG. Here's one conversion chart among many which are available:<br> <br><a target="_blank" href="http://www.engineeringtoolbox.com/awg-wire-gauge-d_731.html">http://www.engineeringtoolbox.com/awg-wire-gauge-d_731.html</a><br><br>When running wires in parallel as you describe, one cannot be assured that the amperage will divide proportionally to the various wire sizes...because the connection to one strand may be stronger/better than the connection to another one. <br> <br>The marine world has the ABYC; the RV world may have something similar...and those organizations may frown on the parallel wiring practice. I wouldn't lose much sleep over this, but I would consider sizing any overcurrent protection for the smallest conductor. <br> <br>Jolliness,<br><br clear="all">Mick Abraham, Proprietor<br><a target="_blank" href="http://www.abrahamsolar.com">www.abrahamsolar.com</a><br><br>Voice: 970-731-4675<br> <br><br><div class="gmail_quote">On Wed, Feb 2, 2011 at 9:00 AM, Starlight Solar, Larry Crutcher <span dir="ltr"><<a target="_blank" href="mailto:larry@starlightsolar.com">larry@starlightsolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div bgcolor="#ffffff"> <div><font face="Arial" size="2">Wrenches,</font></div> <div><font face="Arial" size="2"></font> </div> <div><font face="Arial" size="2">Some of our business involves repairing poor PV solar installations on recreational vehicles. So often we wind up installing a roof junction box and running a second PV to controller wire and then replacing the controller to battery wire size. For instance, we may find a 10 gauge wire run to the controller. We then add #8, #6, #4 or even 2 gauge and parallel to the #10 depending on power and distance of the run. My question: Is there a calculator or chart that will tell me what the combination of any two wire sizes equate to? example: #10 + #4 = X</font></div> <div><font face="Arial" size="2"></font> </div> <div><font face="Arial" size="2">Thanks.</font><font face="Verdana" size="2"></font></div> <div> <div>Larry Crutcher<br><a href="http://www.starlightsolar.com" target="_blank">Starlight Solar Power Systems</a><br><font color="#ff0000"><i><font face="Georgia" size="1">powered by </font><b><font face="Georgia" size="4">S</font><font face="Georgia" size="2">TARLIGHT</font></b></i><font face="Georgia" size="2">™</font></font></div> </div></div> <br>_______________________________________________<br> List sponsored by Home Power magazine<br> <br> List Address: <a target="_blank" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br> <br> Options & settings:<br> <a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br> <br> List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br> <br> List rules & etiquette:<br> <a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a><br> <br> Check out participant bios:<br> <a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a><br> <br> <br></blockquote></div><br> <hr>_______________________________________________<br>
List sponsored by Home Power magazine<br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Options & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br>
<br>
List rules & etiquette:<br>
<a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out participant bios:<br>
<a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><br>
<br>
</div>
</blockquote></span></body></html>