<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Check out NEC 310.4<br></div><div><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>
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-------- Original Message --------<br>
Subject: Re: [RE-wrenches] Parallel wire runs to increase size<br>
From: "Jason Szumlanski" <<a href="mailto:Jason@fafcosolar.com">Jason@fafcosolar.com</a>><br>
Date: Wed, February 02, 2011 12:15 pm<br>
To: "RE-wrenches" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
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</style><div class="WordSection1"><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Nick,<o:p></o:p></span></div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Can you cite a code section that supports this. (not challenging you – it makes sense and I agree)<o:p></o:p></span></div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">I have been wondering about SMA’s recommendation to parallel two 1/0 cables for a Sunny Island. If the wire sizes and lengths are identical, is this acceptable?<o:p></o:p></span></div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-family: "Cambria","serif"; color: rgb(31, 73, 125);">Jason Szumlanski<o:p></o:p></span></div><div class="MsoNormal" style="font-size:12pt;"><span style="font-family: "Cambria","serif"; color: rgb(31, 73, 125);">Fafco Solar<o:p></o:p></span></div></div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></div><div><div style="border-right: medium none; border-width: 1pt medium medium; border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; padding: 3pt 0in 0in;"><div class="MsoNormal" style="font-size:12pt;"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";"> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a> [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Nick Soleil<br><b>Sent:</b> Wednesday, February 02, 2011 12:05 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] Parallel wire runs to increase size<o:p></o:p></span></div></div></div><div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-family: "Arial","sans-serif";">You shouldn't parallel wiring that way. That is not acceptable by code, and it is unnecessary. If the #10 is not sufficient just replace it. Due to the fact that the larger wiring has much less resistance, most if not all of the current will flow on the larger wires.<o:p></o:p></span></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-family: "Arial","sans-serif";"> <o:p></o:p></span></div></div><div class="MsoNormal" style="font-size:12pt;"><span style="font-family: "Arial","sans-serif";">Nick Soleil<br>Project Manager<br>Advanced Alternative Energy Solutions, LLC<br>PO Box 657<br>Petaluma, CA 94953<br>Cell: 707-321-2937<br>Office: 707-789-9537<br>Fax: 707-769-9037<o:p></o:p></span></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-family: "Arial","sans-serif";"><o:p> </o:p></span></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-family: "Arial","sans-serif";"><o:p> </o:p></span></div><div><div class="MsoNormal" style="font-size:12pt;text-align: center;" align="center"><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";"><hr width="100%" align="center" size="1"></span></div><div class="MsoNormal" style="font-size:12pt;margin-bottom: 12pt;"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";"> "Starlight Solar, Larry Crutcher" <<a href="mailto:larry@starlightsolar.com">larry@starlightsolar.com</a>><br><b>To:</b> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br><b>Sent:</b> Wed, February 2, 2011 8:00:07 AM<br><b>Subject:</b> [RE-wrenches] Parallel wire runs to increase size</span><o:p></o:p></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 10pt; font-family: "Arial","sans-serif";">Wrenches,</span><o:p></o:p></div></div><div><div class="MsoNormal" style="font-size:12pt;"> <o:p></o:p></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 10pt; font-family: "Arial","sans-serif";">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</span><o:p></o:p></div></div><div><div class="MsoNormal" style="font-size:12pt;"> <o:p></o:p></div></div><div><div class="MsoNormal" style="font-size:12pt;"><span style="font-size: 10pt; font-family: "Arial","sans-serif";">Thanks.</span><o:p></o:p></div></div><div><div><span style="font-size: 10pt; font-family: "Verdana","sans-serif";">Larry Crutcher<br><a href="http://www.starlightsolar.com" target="_blank">Starlight Solar Power Systems</a><br></span><em><span style="font-size: 7.5pt; font-family: "Georgia","serif"; color: red;">powered by </span></em><em><b><span style="font-size: 13.5pt; font-family: "Georgia","serif"; color: red;">S</span></b></em><em><b><span style="font-size: 10pt; font-family: "Georgia","serif"; color: red;">TARLIGHT</span></b></em><span style="font-size: 10pt; font-family: "Georgia","serif"; color: red;">™</span><o:p></o:p></div></div></div></div></div><div class="MsoNormal" style="font-size:12pt;"><o:p> </o:p></div></div><hr>_______________________________________________<br>
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