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.*
** National Electrical Code 2008 Edition *(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, National Electrical Code 2008 Edition 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:*[email protected]
<mailto:[email protected]>
[mailto:[email protected]] *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 <tel:303%20505-8760>
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
<[email protected] <mailto:[email protected]>> 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
<[email protected] <mailto:[email protected]>>
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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