I see absolutely no Code compliance issues with this method. The April Fool's Code that is...
Brian Teitelbaum AEE Solar -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jason Szumlanski Sent: Thursday, April 01, 2010 9:53 AM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Using Metal Roof as conductor I am installing a PV array at about 400Vdc on a metal roof. The inverter is located a very long way from the array. I am contemplating just running a positive conductor for most of the run. I was thinking about connecting the negative PV conductor to a lug solidly bonded to the metal roof material. Then at the bottom of the roof, near the eave, I would attach another lug and continue with a negative PV conductor. At junctions of the roof material, I would drive a self-tapping stainless steel screw for continuity (with sealant, of course). This would save lots of copper. And since the negative conductor is bonded to the module frame by way of the metal roof, the negative PV conductor would also serve as the ground wire. What do you think? Would this pass inspection? What NEC sections would apply? Thank you for your time, Solar Guru P.S. April Fools _______________________________________________ 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
