Hi Mac, 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%".
So, the 2014 wording basically allows all inverters to follow the exception that used to be there for hybrid inverters. I hope that helps. Cheers, Mark ---- Mark Westbrock| VP, Branch Manager | Employee Owner NABCEP™ Certified PV Installation Professional NABCEP™ Certified Technical Sales Professional NM EE98J Licensed Electrician 510 S. Main St., Las Cruces, NM 88001 cell 575.640.2432 | office 575.524.2030 m...@positiveenergysolar.com <your.em...@positiveenergysolar.com> www.PositiveEnergySolar.com <http://www.positiveenergysolar.com/> <http://www.positiveenergysolar.com> On Fri, Aug 12, 2016 at 7:26 AM, Mac Lewis <maclew...@gmail.com> wrote: > Hello wrenches, > > 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. > > Thanks in advance code experts > > > > -- > > > > Mac Lewis > > *"Yo solo sé que no sé nada." -Sócrates* > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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