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. 

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. 

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.

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. 



 
On Mar 25, 2013, at 6:26 PM, William Miller wrote:

> David:
> 
> 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 (insert your problem citation here) 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...
> 
> Thanks!
> 
> William Miller
> 
> PS:  Just kidding.  Hope no offense is taken.
> 
> wm
> 
> 
> At 03:46 PM 3/25/2013, you wrote:
> 
>> 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....
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