Hi Jason I would see if your inverter company has an engineer that can send a letter or pay Bill B to write one. I don't see how you can get out of his logic of yet another well written piece of code.
Jay Peltz power. Sent from my iPhone > On Nov 18, 2015, at 5:29 AM, Jason Szumlanski > <ja...@floridasolardesigngroup.com> wrote: > > This has reached a new level of misinterpretation. See my response and > inspector's further misinterpretation regarding fastening of breakers. I'm at > a loss of what to do now. I would just have the backfed breakers fastened, > but the clips can't be installed on adjacent breakers, so it's impossible > when you have more than one backfed breaker on one side of a panelboard. > > Am I missing something here? > > > > > > > On Wed, Nov 18, 2015 at 8:04 PM, Inspector Who Shall Not Be Named wrote: > > Sorry I haven’t gotten back to you in a couple of days. > > 2011 NEC Article 690.10 (E) says: > > Back-fed Circuit Breakers. Plug-in type back-fed circuit breakers connected > to a stand-alone inverter output in either stand-alone or utility-interactive > systems shall be secured in accordance with 408.36(D). Circuit breakers that > are marked line or load shall not be backfed. > > It is stand a stand alone output if it is not fed back into the meter. It is > a utility interactive output if it is. But either way the inverter itself is > stand alone unit. > > > 2011 NEC Article 705.12(D)(6) says: > > Fastening. Listed plug-in type circuit breakers backfed from > utility-interactive inverters that are listed and identified as interactive > shall be permitted to omit the additional fastener normally required by > 408.36(D) for such applications. > > As you can see it says LISTED PLUG IN TYPE CIRCUIT BREAKERS. It also says > listed for the inverter but is needed is a listed breaker or it needs to be a > bolt in type. > > These are the new NEC changes that are now in effect. > > > > > On Fri, Nov 13, 2015 at 4:24 PM, Jason Szumlanski <> wrote: > I think there are two sources of confusion here. > > 610.10(E) does not apply to the systems in question in any way. 610.10 > applies only to breakers connected to a standalone inverter. The definition > of stand-alone system (690.2) is a system that operates independently of a > distribution network (utility). These systems are not stand-alone. > > 705.12(D)(6) says the inverter needs to be listed and identified as > interactive, not the breaker. > > > > >> On Fri, Nov 13, 2015 at 5:05 PM, Jason Szumlanski >> <ja...@floridasolardesigngroup.com> wrote: >> NEC 2011 - one inspectors misinterpretation of the code below for your >> amusement and comments. I have to admit that 705.12(D)(6) is somewhat >> ambiguous. Appropriate use of commas by code writers would be very helpful. >> I was able to find Mike Holt's guide that clears it up, so hopefully that >> will do the trick. >> >> >> From the inspector: >> >> I am sending this e-mail to straighten out the confusion and lay out the >> requirements of the 2011 NEC requirements which now govern solar >> photovoltaic breaker requirements. >> >> >> Any back fed breaker is required to be secured in accordance with 2011 NEC >> 408.36 (D) which says: >> >> >> >> Back-Fed Devices. Plug -in type overcurrent protection devices or plug in >> type main lug assemblies that are backfed and used to terminate field >> –installed ungrounded supply conductors shall be secured in place by an >> additional fastener that requires other than a pull to release the device >> from the mounting means on the panel. >> >> >> >> This is also reiterated in the solar photovoltaic article 2011 NEC 690.10 >> (E) which says: >> >> >> >> Back-fed Circuit Breakers. Plug-in type back-fed circuit breakers connected >> to a stand-alone inverter output in either stand-alone or >> utility-interactive systems shall be secured in accordance with 408.36(D). >> Circuit breakers that are marked line or load shall not be backfed. >> >> >> >> >> >> NEC 2011 Article >> >> 705.12(D)(6) does not say what you have sent. This is what it says Word >> for Word: >> >> >> Fastening. Listed plug-in type circuit breakers backfed from >> utility-interactive inverters that are listed and identified as interactive >> shall be permitted to omit the additional fastener normally required by >> 408.36(D) for such applications. >> >> >> >> What this article says is that if the manufacturer has gotten his breaker UL >> listed and the breaker is identified as interactive it may be used without a >> hold down device. >> >> >> >> Again in conclusion a breaker may be used if it has been certified and >> listed by the manufacturer and is marked interactive. If you can find a >> listed and interactive identified breaker then you may use it without having >> to secure it in place as required by 408.36(D). All parties involved have >> been sent the above attached document which very nicely explains the new >> requirements but I will attach it again just in case you happened to have >> lost it. >> >> >> >> If anyone has anymore questions please feel free to contact me. >> > > _______________________________________________ > 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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