Thanks to Nick for catching a misstatement in my email, corrected below
in *bold*. I was trying to make a general statement out of his specific
situation.
On 2014/6/26, 10:20, Dave Click wrote:
NEC says 10' from the array, defined as "A mechanically integrated
assembly of modules or panels with a support structure and foundation,
tracker, and other components, as required, to form a direct-current
power-producing unit. 70HB14_CH00_FM_pi_xii.pdf " I take this to mean
that the "array" definition includes support structure, so you could
go 10' from the bottom of the pole?
But that doesn't matter, as rapid shutdown requirements only apply to
PV systems *[conductors]* "on or in" buildings; it only applies to a
ground-mounted system if you bring the dc all the way into *or
onto***a building (*if you are >10' from the array or >5' within the
structure*). So, Rapid Shutdown doesn't apply at all to your scenario
where only the ac wiring from a pole mount enters the building.
DKC
On 2014/6/25, 12:00, Jesse Dahl wrote:
Re-reading this rapid shutdown convo.
Does 10' from the array mean from the modules or the "mount"? What
if the array is on a pole, the pole is 15' tall and the inverter is
mounted at the base of the pole? Since the array (modules) is 15'
from the inverter is rapid shutdown required?
Again, since the title of 690.12 is "On Buildings" is it required for
pole mounts where only AC enters the building? Thoughts?
Thanks!
Jesse
On Sat, Apr 19, 2014 at 12:22 PM, Dan Fink <danbo...@gmail.com
<mailto:danbo...@gmail.com>> wrote:
Hi Aaron, boB, Wrenches;
I think Aaron brings up a good point, and it's certainly
confusing to me.
The boldface type heading of 690.12 is "Rapid Shutdown of PV
Systems on Buildings"
The body of the 690.12 text begins with "PV system *circuits*
installed on or in buildings shall....."
690.2 defines "Photovoltaic source circuit" as "Circuits between
modules and from modules to the common connection point(s) of the
DC system"
and "Photovoltaic output circuit" as "Circuit conductors between
the PV source circuit(s) and the inverter or DC utilization
equipment."
"PV system" from the heading of 690.12 is not defined in 690.2,
other than that the definition of "Photovoltaic system voltage"
specifically includes both PV output and source circuits.
To me the confusing part of 690.12 is "PV Systems on Buildings"
is that "system" is not defined, and tends to imply rooftop
arrays. But "PV system circuits installed on or in buildings
shall....." is pretty clear. I interpret it to mean anything DC
and PV stuck to the side of building like conduit, etc, or
running inside....which means it applies to ground-mount arrays
too if they terminate outside or inside the building.
What I'm seeing as the easy work-around for us off-grid folk is
the old "power shed" idea containing battery bank, balance of
system, inverter etc....just build it within 10 feet of the PV
array and you're fine.
Any thoughts?
Dan Fink,
Executive Director;
Otherpower
Buckville Energy Consulting
Buckville Publications LLC
NABCEP / IREC accredited Continuing Education Providers
970.672.4342 <tel:970.672.4342>
On Fri, Apr 18, 2014 at 3:30 PM, b...@midnitesolar.com
<mailto:b...@midnitesolar.com> <b...@midnitesolar.com
<mailto:b...@midnitesolar.com>> wrote:
Bill Brooks should probably respond to this also, but reading
the NEC, it looks like if the wires
do not go inside the building to run more than 5 feet (as the
crow flies), the the rapid disconnect
does not apply. OR, less than 10 feet from the array IF
the PV is mounted on that building.
boB
On 4/18/2014 1:34 PM, Aaron Mandelkorn wrote:
The rapid shutdown language is so confusing. When looking
at the rapid shutdown language, does PV systems "on" a
building refer to only situations where the array is on a
building; or does it include DC conductors as well. For
example, if the DC conductors from a pole mounted array
run up the side of a building before punching in to the
inverter, does this require rapid shutdown? Is this PV
system considered "on" a building?
Aaron
Aaron Mandelkorn
Owner/Solar Specialist
Renewable Energy Outfitters
719-221-5249 <tel:719-221-5249>
970-596-3744 <tel:970-596-3744>
www.reosolar.com <http://www.reosolar.com>
reoso...@gmail.com <mailto:reoso...@gmail.com>
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