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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'>All,<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'>The 2011 NEC reference for stand-alone systems is 705.12(D)(2) Exception:<o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></i></p><p class=MsoNormal><i><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Exception: Where the photovoltaic system has an energy storage device to allow stand-alone operation of loads, the value used in the calculation of bus or conductor loading shall be 125 percent of the rated utility-interactive current from the inverter instead of the rating of the overcurrent device between the inverter and the bus or conductor.<o:p></o:p></span></i></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'>The 2014 NEC made this the rules of the road for all inverter output circuits connected to other sources.<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'>Bill.<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><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> RE-wrenches [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Howie Michaelson<br><b>Sent:</b> Friday, August 12, 2016 8:39 AM<br><b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b>Subject:</b> Re: [RE-wrenches] 120% rule for hybrid inverters<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Mark, I read that section as stating that <u>both</u> must be true, which I would take to mean if one is using a 20 amp breaker to protect the output from a 3 kW inverter, you need to count it as 20 amps toward the 120% rule, not the 15.63 amps the 125% calculation would infer. I know that 2014 was changed to allow for larger breakers to feed hybrid inverters, but I can't recite the code that allows that (unless I am misreading the intent of the section you quoted). Can you clarify this for me?<o:p></o:p></p></div><p class=MsoNormal>Thanks,<o:p></o:p></p></div><p class=MsoNormal>Howie<o:p></o:p></p><div><div><div><div><p class=MsoNormal><br clear=all><o:p></o:p></p><div><div><div><p class=MsoNormal><b><span style='color:#783F04'>Howie Michaelson</span></b><br><i><span style='font-size:7.5pt'>NABCEP Certified Solar PV Installer™</span></i><br>Sun Catcher, LLC<br><span style='font-size:10.0pt;color:#444444;background:white'>Renewable Energy Systems Sales and Service<br>VT Solar Electric Incentive Partner</span><br><span style='color:#B45F06'>802-272-0004</span><o:p></o:p></p></div></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Fri, Aug 12, 2016 at 9:39 AM, Mark Westbrock <<a href="mailto:westbrock@positiveenergysolar.com" target="_blank">westbrock@positiveenergysolar.com</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif'>Hi Mac,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif'>The wording changed because in the 2011 NEC 705.12(D) you had to use the size of your backfeed breaker in calculating the busbar loading, but in 2014, 705.12(D)(2)(3)(b) now says "125 percent of the inverter output circuit current and the rating of the OCPD protecting the busbar shall not exceed 120%". <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif'>So, the 2014 wording basically allows all inverters to follow the exception that used to be there for hybrid inverters. I hope that helps.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif'>Cheers,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif'>Mark<o:p></o:p></span></p></div></div><div><p class=MsoNormal><br clear=all><o:p></o:p></p><div><div><div><div><div><div><div><div><div><div><div><div><div><div><p class=MsoNormal>----<o:p></o:p></p></div><div><div><div><p class=MsoNormal><span style='font-size:11.5pt;font-family:"Calibri",sans-serif;color:#0076BE'>Mark Westbrock</span><span style='font-size:11.5pt;font-family:"Calibri",sans-serif;color:#666666'>| VP, Branch Manager | Employee Owner</span><span style='font-size:9.5pt'><o:p></o:p></span></p></div><div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif;color:#444444'>NABCEP™ Certified PV Installation Professional<o:p></o:p></span></p></div></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif;color:#444444'>NABCEP™ Certified </span><span style='font-size:11.5pt;font-family:"Calibri",sans-serif;color:#666666'><o:p></o:p></span></p><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif;color:#444444'>Technical Sales Professional<o:p></o:p></span></p></div></div><div><p class=MsoNormal><span style='font-family:"Tahoma",sans-serif;color:#444444'>NM EE98J Licensed Electrician</span><span style='font-size:9.5pt'><o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:11.5pt;font-family:"Calibri",sans-serif;color:#666666'>510 S. Main St., Las Cruces, NM 88001</span><span style='font-size:9.5pt'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.5pt;font-family:"Calibri",sans-serif;color:#666666'>cell <a href="tel:575.640.2432" target="_blank">575.640.2432</a> | office <a href="tel:575.524.2030" target="_blank">575.524.2030</a></span><span style='font-size:9.5pt'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.5pt;font-family:"Calibri",sans-serif;color:#3D85C6'><a href="mailto:Your.Email@PositiveEnergySolar.com" target="_blank"><span style='color:#1155CC'>mw@PositiveEnergySolar.com </span></a></span><span style='font-size:9.5pt'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.5pt;font-family:"Calibri",sans-serif;color:#3D85C6'><a href="http://www.positiveenergysolar.com/" target="_blank"><span style='color:#1155CC'>www.PositiveEnergySolar.com</span></a></span><span style='font-size:9.5pt'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:9.5pt'><a href="http://www.positiveenergysolar.com" target="_blank"><span style='text-decoration:none'><img border=0 id="_x0000_i1025" src="https://www.positiveenergysolar.com/wp-content/uploads/Positive-Energy-Solar-horizxs.png"></span></a><o:p></o:p></span></p></div></div></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Fri, Aug 12, 2016 at 7:26 AM, Mac Lewis <<a href="mailto:maclewis1@gmail.com" target="_blank">maclewis1@gmail.com</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><p class=MsoNormal>Hello wrenches,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I am looking for the exception to the 120% rule in the 2014 code that allowed for compliance to the 120% rule to be based on the utility-interactive current as opposed to the backfeed breaker size for hybrid inverter. I hope this still exists, but I'm having a hard time finding it in the 2014 code. In 2011 it was 705.12(D)2 Exception. That was nice clear language that all inspectors accepted, I'm hoping the same exists for the 2014 code.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks in advance code experts<o:p></o:p></p></div><div><p class=MsoNormal><span style='color:#888888'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:#888888'><br clear=all><o:p></o:p></span></p><div><p class=MsoNormal><span style='color:#888888'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='color:#888888'>-- <o:p></o:p></span></p><div><div><p class=MsoNormal><span style='color:#888888'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:#888888'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:#888888'><o:p> </o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='color:#888888'>Mac Lewis</span><b><span style='font-family:"Arial",sans-serif;color:#FF9900'><o:p></o:p></span></b></p><p><span style='color:#305A78'>"Yo solo sé que no sé nada." </span><b><span style='color:#686868'>-Sócrates</span></b><b><span style='font-family:"Arial",sans-serif;color:#FF9900'><o:p></o:p></span></b></p></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & 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://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</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 or update participant bios:<br><a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a><br><br><o:p></o:p></p></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>List sponsored by Redwood Alliance<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Change listserver email address & 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://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html" target="_blank">http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html</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 or update participant bios:<br><a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a><br><br><o:p></o:p></p></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div></div></body></html>