Jeff, We have had some issues with this also .....maybe try this ref from the 2011 code 690.16 (b) where the disconnect is located more than 1.8 m (6ft) from the overcurrent device, a directory showing the location of each disconnect shall be installed at the overcurrent device location
On Thu, Nov 17, 2011 at 3:40 PM, Ryan Mayfield <r...@renewableassociates.com > wrote: > Jeff, > > Try pointing them to 690.14(B). This allows for PV source circuit isolating > switches on the PV side of the disconnecting means. As you describe it, the > dc disconnect at the inverter is the required PV disconnecting means and > you > can describe the combiner disconnects as source circuit isolating switches. > This paragraph doesn't make mention of accessibility. > > Good luck, > > Ryan > > > > -----Original Message----- > From: re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jeff Yago > Sent: Thursday, November 17, 2011 11:57 AM > To: 'RE-wrenches' > Subject: Re: [RE-wrenches] Code reviewer issue with array disconenct > location > > Here's another one of those reviewers that do not know what they are > reviewing and just cause added hours of lost time. Large 112 kW array > mounted on top of structural steel beams above multi-story parking deck. > Beams straddle center up and down ramps so no parking spaces are lost. > Multiple rows of modules and require ladders to access. Budget reviewer > deleted my design of grated walkways behind each row, so you must use tie > offs to work on any part of system. > > Each row includes a fused combiner box at center line, with individual > conduit from each grouped down centerline on high mounting then down to > inverter located outside on top deck. Inverter includes both AC and DC > disconnects which are readable accessible. Other AC disconnects included in > electric room and outside at meter. > > Due to long runs from each array row back down to inverter, I specified the > fused combiner boxes to include a DC disconnect option located in the cover > (memory of Target Store conduit fire!) which not only allows disconnecting > any single row without shutting down entire system, but also useful for > testing and service. > > Reviewer demands this "disconnect" meet code requirement that a > "disconnect" > must be readable accessible. I have told them we cannot separate this > disconnect from the combiner box and will not relocate these high voltage > combiner boxes down at eye level on a raised parking deck where any student > could gain access, so if they make an issue of this we will use a different > combiner box that does not have this option (and also loose added > protection > of conduit runs between combiners and inverter). However, I would like to > refer to code and I see no mention of a combiner box as required by code so > there is no reference to it having a disconnect. > > Suggestions? > > Jeff Yago > DTI Solar Inc. > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & 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 > > Options & 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 > > -- *James B Rudolph NABCEP Certified PV Installer *
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