Thanks Bill. That's another welcome change to look forward to in NEC 2014. On Mar 25, 2013, at 9:53 PM, Bill Brooks wrote:
> All, > > Here is the language that has been accepted into the 2014 NEC: > > 690.31(C)(2) > > (2) Cable Trays. PV source circuits and PV output circuits using > single-conductor cable listed and labeled as Photovoltaic (PV) wire of all > sizes with or without a Cable Tray marking/rating shall be permitted in cable > trays installed in outdoor locations provided the cables are supported at > intervals not to exceed 30cm (12 in.) and secured at intervals not to exceed > 1.4m (4.5’). > > I hope this helps. It is a very big deal. > > Bill. > > > > From: re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of David Brearley > Sent: Monday, March 25, 2013 6:01 PM > To: RE-wrenches > Subject: Re: [RE-wrenches] Cable tray > > 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.... > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org >
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