[RE-wrenches] (no subject)

[Jason Szumlanski]

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.hren at 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 <
> mjmorningstar at 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 <william at 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 <jason at 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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