I am not required to meet 2017 code. In Florida, they are only up to the 2011 code. I want to bring it up to NEC2017 regardless. So for my questions, assume the 2017 code is relevant. And it is a flat carport roof, the rack is mounted at a fixed tilt of about 20 degrees. Understood?
From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf Of Ray Sent: Wednesday, June 12, 2019 4:24 PM To: re-wrenches@lists.re-wrenches.org Subject: Re: [RE-wrenches] need for outdoor DC disconnect Are you required to meet the latest code? In many retrofit/ replacement situations, you are only required to meet the code requirements of the date the original system was installed. Metal vs PVC is dependent on the code version you are meeting. Was metal a NEC 2008 requirement? I don't have my old code versions here. When metal is required, its only from the point of entry into the building to the inverter, so if you mount the inverter outdoors, it doesn't have to change either. I've got lots of legacy systems that have PVC on the inside, and never had an issue. Seems like more trouble to change out than its worth, but if the AHJ requires it, then yes. Also, you didn't mention if the array was roof or ground mounted, which would effect the 690.12 interpretation. Ray Walters Remote Solar 303 505-8760 On 6/12/19 12:49 PM, Kirk Herander wrote: All, I am retrofitting an existing PV system with Storedge / LG Chem / optimizers and updating some code issues. I am replacing the PVC conduit carrying the array conductors into the building with metallic raceway to the point of DC disconnect(i.e. the inverter). The array is presently connected to an Outback inverter / FM60 controller / AGM batteries (grid tied with backup). If I am interpreting NEC 690.12 etc. correctly, a DC disconnect outdoors is generally not required because of new rapid shutdown capability, amongst other reasons. Would this be the case regardless of metal or plastic conduit penetrating the building? The system at present has no outdoor DC disco, and to me that's a violation in addition to lack of metallic raceway entering the building. Thanks. Kirk Herander Owner|Principal, VT Solar, LLC Celebrating our 28th Anniversary 1991-2019 <https://nam02.safelinks.protection.outlook.com/?url=www.vermontsolarnow.com &data=02%7C01%7C%7C9f0330d75a244870112408d685311841%7C84df9e7fe9f640afb435aa aaaaaaaaaa%7C1%7C0%7C636842843233477645&sdata=0NjyuKeQbEK6245SNnk8X4XnP9Q%2B %2BqtvcALkdDghvk4%3D&reserved=0> www.vermontsolarnow.com dba Vermont Solar Engineering NABCEPTM 2003 Inaugural Certificant VT RE Incentive Program Partner 802.863.1202 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org <mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> Check out or update participant bios: www.members.re-wrenches.org <http://www.members.re-wrenches.org>
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