Dave I agree, in the case of microinverters, you already have a main PV System disconnect at the Load Panel to shut down the system that is readily accesible. I would consider the disconnect on the roof as a supplemental disconnect for the purposes of maintenance by authorized personal that only needs to be accessible.
Bill On Tue, Apr 29, 2014 at 8:44 AM, Dave Click <davecl...@fsec.ucf.edu> wrote: > I think 240.24(A)(4) allows the installation of the inverter OCPDs in the > SolaDeck hidden under a module. > > *240.24 Location in or on Premises.* > *(A) Accessibility.* Overcurrent devices shall be readily accessible and > shall be installed so that the center of the grip of the operating handle > of the switch or circuit breaker, when in its highest position, is not more > than 2.0 m (6 ft 7 in.) above the floor or working platform, unless one of > the following applies: > ... > (4) For overcurrent devices adjacent to utilization equipment that they > supply, access shall be permitted to be by portable means. > > > And if panelboards / fused safety switches are allowed to have > screwed-down covers over the OCPDs, I'd think that installing a removable > module over these OCPDs would meet NEC. I guess an AHJ could argue that > this requires TWO covers be removed, unlike a panelboard or a switch. > > DKC > > > On 2014/4/29, 11:15, Jason Szumlanski wrote: > > 690.9(D) is not applicable to the original discussion because we were > talking about an Inverter output circuit, not a PV Source or Output circuit. > > 690.34 may apply if you call a SolaDeck with breakers a junction box, > but I can see that being a stretch in the mind of many. > > My and Ray's question about the screws on the SolaDeck cover itself > requiring a tool to render it accessible is still an issue if the breakers > themselves need to be "readily accessible," but that would also apply to a > Midnite MNPV, which also has a cover with a screw. > > > Jason Szumlanski > >> >> On 4/28/2014 5:57 PM, Bill Brooks wrote: >> >> Read 690.9(D) and 690.34. Not sure where this "hysteria--run for the >> border" sentiment is coming from. >> >> >> >> *690.9(D) Photovoltaic Source and Output Circuits. *Listed PV >> >> overcurrent devices shall be required to provide overcurrent >> >> protection in PV source and output circuits. The overcurrent >> >> devices shall be accessible but shall not be required to >> >> be readily accessible. >> >> >> >> *690.34 Access to Boxes. *Junction, pull, and outlet boxes >> >> located behind modules or panels shall be so installed that >> >> the wiring contained in them can be rendered accessible >> >> directly or by displacement of a module(s) or panel(s) secured >> >> by removable fasteners and connected by a flexible >> >> wiring system. >> >> >> >> This is not a change. Please help me understand the concern. >> >> >> >> Bill Brooks. >> >> >> >> >> >> *From:* re-wrenches-boun...@lists.re-wrenches.org [ >> mailto:re-wrenches-boun...@lists.re-wrenches.org<re-wrenches-boun...@lists.re-wrenches.org>] >> *On Behalf Of *Ray Walters >> *Sent:* Monday, April 28, 2014 2:23 PM >> *To:* RE-wrenches >> *Subject:* Re: [RE-wrenches] (no subject) >> >> >> >> Interesting so does "require a tool" include taking a screw off the cover >> plate of the combiner box, too? >> What a game changer. I'm going to Mexico for my next project; I'll >> actually enjoy even more being the sole AHJ on the project. >> >> R.Ray Walters >> >> CTO, Solarray, Inc >> >> Nabcep Certified PV Installer, >> >> Licensed Master Electrician >> >> Solar Design Engineer >> >> 303 505-8760 >> >> On 4/28/2014 2:52 PM, Michael Morningstar wrote: >> >> Readily accessible is now defined in the 2014 NEC. Installing OCPD's >> underneath a module is a major faux paux, and I can't imagine any AHJ >> thinking otherwise. Having to remove a module in order to reset a breaker, >> what a drag. >> >> >> >> "Capable of being reached quickly for operation, renewal or inspection >> without requiring those concerned to use a tool, to climb over, remove >> obstacle or other." >> >> >> >> Michael >> >> >> >> >> >> >> >> >> >> On Apr 28, 2014, at 10:29 AM, William Miller <will...@millersolar.com> >> wrote: >> >> >> >> You call it a solar panel, I call it a glass j-box cover plate. >> >> William >> >> Miller Solar >> >> >> On Apr 28, 2014, at 9:21 AM, Jason Szumlanski <ja...@fafcosolar.com> >> wrote: >> >> If that is the interpretation, >> I don't see how the breakers are "readily accessible" in a SolaDeck >> mounted anywhere, regardless of whether it is under a module. It >> requires removal of four screws (using a tool) to access the breakers >> inside the enclosure. It's all up to the AHJ. It has not been an issue >> locally here. I can see how other jurisdictions may not >> concur. >> >> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches..org> >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> >> > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & > settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette:www.re-wrenches.org/etiquette.htm > > Check out participant bios:www.members.re-wrenches.org > > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > -- William Hoffer 161 SE Fourth Ave P.O. 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