An inspector can bump absolutely anything. That doesn't mean they've correctly interpreted the code or made a decision that increases electrical safety, only that they have the authority to call it anyway they like.
What constitutes a long DC circuit in a building? Ten feet, fifty feet? What if it's in RMC? What if it's in metallic flex conduit in a crawl space and droops every four feet between joists? How about if it enters through a roof, into a tight attic. A good AHJ will look at the big picture and make a decision based on the code, their own experience in the trade, and common sense. Some will simply cover their ass. They do bear a rather large burden of responsibility. Dick Ratico Solarwind Electric --- You wrote: Regarding the DC disconnect, the 2008 Handbook 690.14C(1) comments, "These requirements generally prohibit long runs of PV source and input circuits inside a building before reaching the required PV disconnect. A short conductor run through a wall at the point of first penetration to reach a disconnect mounted inside the building is allowed." I think an inspector could bump a long DC circuit through a building even if it was in conduit. What do you all think? Joel Davidson ----- Original Message ----- From: Bill Brooks To: 'RE-wrenches' Sent: Friday, December 18, 2009 8:32 PM Subject: Re: [RE-wrenches] 690.31E (through a building) Mark, The readily accessible disconnect at the inverter is all that is necessary according to the code. There may be practical reasons for additional disconnects, but if the system has no combiner box, or the combiner is at the inverter, only the disconnect at the inverter is required. Bill. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mark Dickson Sent: Friday, December 18, 2009 3:25 PM To: 'RE-wrenches' Subject: [RE-wrenches] 690.31E (through a building) Hello there, Due to a lot of concrete and asphalt, we are forced to run our PV source circuits in through one exterior wall, through a crawl space and out through the opposite exterior wall to our inverter and disconnect. We will be using EMT and will not be making any stops while inside the building. We will however need to place a couple of pull-boxes due the various required bends in excess of 360*. Will we be required to place a DC disconnect at the "first readily accessible" point inside the building? Best regards, Mark Dickson, NABCEP Certified Solar PV Installer T Oasis Montana Inc. --- end of quote --- _______________________________________________ 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
