Setting aside code issues for a moment, I wouldn't hesitate to put an OCPD under a module if strategically located such that only one module needs to be removed and there is adequate working space (i.e. the last module in a row). How often are OCPD service issues encountered, especially AC inverter output circuits? Very infrequently in my experience. I think it's good practice to keep a SolaDeck AC output circuit combiner box out of the blazing Florida sun, plus it looks a heck of a lot better. I did it at my home, and I'm happy I did so.
Jason Szumlanski On Mon, Apr 28, 2014 at 5:38 PM, Rebekah Hren <rebekah.h...@gmail.com>wrote: > *Fuses for PV dc circuits do not have to be readily accessible:* > > 690.9(D) Photovoltaic Source Circuit and Output > > 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. > > The language allowing j-boxes under modules has been in the NEC for many > cycles: > > 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. > > A dc combiner is now defined in the 2014 Code as a device/equipment and > thus outlet might have it covered. I think there is an argument to be made > that a box containing overcurrent protection can be positioned under a > module. However I don't think it's a great idea and wouldn't want to > maintain a system with fuses on a roof under the array, but this seems like > a grey area in the Code and getting the AHJ interpretation would be > advisable. > > Rebekah Hren > > > > > > > > > On Mon, Apr 28, 2014 at 4:52 PM, Michael Morningstar < > mjmornings...@gmail.com> 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. >> >> _________________ >> >>
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