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<font size=3>Kirk:<br><br>
When you say inverter combiner, I am confident you mean the device
combining the AC output conductors of multiple inverters.<br><br>
I got the same jive from an over zealous inspector once, but he and your
inspector are just plain wrong. Examine and show them the
diagram in the code book of PV source and output conductors
(690.2). These are all DC PV conductors, not AC conductors, and,
assuming the statement in the paragraph above is correct, the
passage has no application here. This is a rookie inspector
mistake.<br><br>
Good luck,<br><br>
William<br><br>
PS: By saying the source and output connectors are connected
together, this is an oblique way of describing the PV combiner, the one
point where PV source and output circuits are connected
together.<br><br>
WM<br><br>
<br><br>
At 06:10 PM 4/9/2011, Kirk Herander, VSE wrote:<br>
<blockquote type=cite class=cite cite>2008 NEC states that:<br><br>
(B) Conductors of Different Systems. Photovoltaic<br>
source circuits and photovoltaic output circuits shall not be<br>
contained in the same raceway, cable tray, cable, outlet box,<br>
junction box, or similar fitting as feeders or branch circuits<br>
of other systems, unless the conductors of the different systems<br>
are separated by a partition or are connected together.<br><br>
Can anyone describe and give an example of what "connected
together" means<br>
to inverter PV circuits in the same conduit as a branch (load)
circuit?<br><br>
I have a single existing PVC conduit to a barn with an AC load subpanel.
I<br>
want to run the output conductors of an inverter combiner panel in the
barn<br>
through the same conduit to get to be main building. The fill /
derating<br>
calcs work to do this. The inspector says I have to run a new conduit
for<br>
the AC inverter combiner because the subpanel feeder and the combiner
output<br>
conductors are "not connected". But they are both connected to
the main<br>
building panel. Any insight will be appreciated. Thanks. I've also been
told<br>
that the NEC 2011 comments on 690.4 (B) clarify this. Can anyone
comment?<br>
Obviously I am not mixing DC and AC conductors.<br><br>
<br><br>
Kirk Herander</blockquote>
<x-sigsep><p></x-sigsep>
William Miller <br>
Miller Solar<br>
Voice :805-438-5600<br>
email: william@millersolar.com<br>
<a href="http://millersolar.com/" eudora="autourl">http://millersolar.com<br>
</a>License No. C-10-773985<br>
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