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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Doug,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>705.95(B) allows you down size your neutral if it is used solely for instrumentation and it must be sized equal to or larger than the EGC but this is not the case. If Power One says a full size neutral is needed than that means that it is not just a voltage sensing conductor used for instrumentation and that it does carry current.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> I don’t believe there are any exceptions in code for downsizing your neutral in regards to upsizing the conductors to account for voltage drop but I could be wrong. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>--<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>John Stimac | Corvallis, OR<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Renewable Energy Associates LLC<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>541-754-2001 Office/Fax<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><a href="mailto:john@renewableassociates.com">john@renewableassociates.com</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><a href="http://www.renewableassociates.com/">www.renewableassociates.com</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><img border=0 width=200 height=79 id="Picture_x0020_1" src="cid:image001.jpg@01CE6CE7.973B1580" alt="REAL_logo_black2"><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Drake<br><b>Sent:</b> Wednesday, June 19, 2013 6:42<br><b>To:</b> re-wrenches@lists.re-wrenches.org<br><b>Subject:</b> [RE-wrenches] Full sized neutral - 240 V inverter<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hello Wrenches,<br><br>Power One tech support said that full sized neutrals had to be run to a pair of 240 V, PVI 3.6 inverters. We have a 180 foot underground run to the service panel. <br><br>Why do we need to run a full sized neutral all the way back to the panel? The wiring to the panel is oversized for voltage drop. The code allows for reduction of neutral size where neutral imbalance is less than the current of a phase, which is usually the case. <br><br>Why does a neutral need to be installed that is the size of the phase wiring where the imbalance should be negligible? Or is there a lot of neutral current for some reason? Am I missing something? <br><br>Thanks<br><br>Drake <br><br><br>Drake Chamberlin<br><i>Athens Electric LLC<br>OH License 44810<br>CO License 3773<br>NABCEP Certified Solar PV Installer<br>740-448-7328<br></i><a href="http://athens-electric.com/">http://athens-electric.com/</a> <o:p></o:p></p></div></body></html>