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David:<br><br>
Of course, I understand that you are not saying we can willfully
disregard the Code in anticipation of future clarification. I was
just extrapolating on your idea. <br><br>
If we want an exception based on a predicted update in the code, we are
at the mercy of the AHJ who may or may not be convinced. I think
most AHJs are willing to diverge from the Code in a more strict
interpretation, but not the reverse. Right now, as I read it, unless the
leads are 1/0 or larger, we are forbade.<br><br>
I treat PV systems like rooftop AC units. The voltages and currents
are similar, if not more severe. I don't believe you could or
should run power to a rooftop AC unit in cable tray. Conduit is a
tried and true practice and I recommend it.<br><br>
William Miller<br><br>
<br>
At 06:01 PM 3/25/2013, you wrote:<br>
<blockquote type=cite class=cite cite>Ouch. I promise I'm not advocating
for anything like that. What I may be missing is the Code reference that
says "no cable tray on roofs" or similar. <br><br>
There is so much room for improvement in wire management practices, that
being able to use cable tray seems like a step forward. I understand some
jurisdictions do not allow it, but it appears as though Code changes were
made specifically to address this. It's boring stuff, but you can read
the explanation of the Code changes in the ROP and ROC documents.
<br><br>
The Code changes a lot with regards to PV system, and Article 690 is more
fluid than other articles. Some of this is the Code trying to keep up
with technology. In other cases the Code evolves based on new
applications for existing products. Often it changes because some areas
of the Code are confusing for electricians and inspectors alike. If the
new Code language is more clear in its intent than previous versions,
some inspectors are willing to let installers build to the most current
standard.<br><br>
That's all I'm advocating for: Trying to understand how the minimum
requirements outlined in Code evolve over time so that you can have a
friendly and informed conversation with your AHJ over a donut. <br><br>
<br><br>
<br>
On Mar 25, 2013, at 6:26 PM, William Miller wrote:<br><br>
<blockquote type=cite class=cite cite>David:<br><br>
This is great news. Now, whenever I want to do something that is
prohibited by code, I can just say that the Code Making Panel is gonna
correct that pesky code section (<i>insert your problem citation
here</i>) any day now, so I might as well be allowed to do whatever it
was I was fixin' to do anyway. Unless I am missing
something...<br><br>
Thanks!<br><br>
William Miller<br><br>
PS: Just kidding. Hope no offense is taken.<br><br>
wm<br><br>
<br>
At 03:46 PM 3/25/2013, you wrote:<br><br>
<blockquote type=cite class=cite cite>So if you ever get called on
392.10(B)(2), I think you can point out that the Code Making Panels have
been busy clarifying that cable tray is okay for source circuit
conductors. Unless I'm missing
something....</blockquote>_______________________________________________<br>
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