Bill; If it's the IFC (International Fire Code) you need to comply with, the reference is 605.11.2 in 2012 and 2015 IFC -- Location of DC Conductors, which states they should be located at least 10 inches below the roof decking, and as close as possible to supporting members (firefighters won't cut through supporting members).
If your AHJ is using IFC 2018, Location of DC Conductors was not included in the new 1204 Energy Systems chapter, as the system should have NEC 2020 690.12 Rapid Shutdown, which makes location of DC conductors moot, as they shouldn't be energized anyway after actuating RSS. In cases like where there is no RSS (for example the 690.12 exemption for non-habitable structures intended only to house PV BOS) the AHJ could require IFC 605.11.2 compliance. Always check with your AHJ(s) as Fire Codes are frequently amended/excepted by local authorities.....though at least these sometimes make it into the next IFC cycle (for example the Boulder CO and CA and OR rooftop setback exceptions are now in IFC2018). Dan Fink Buckville Energy Consulting On Fri, Jun 5, 2020, 10:46 frenergy <[email protected]> wrote: > Hey Folks, > > I need some clarification, I'm getting conflicting views. > When running DC in metal conduit from the roof array to the exterior > wall mounted string Inverter and the attic is the way to go (for various > reasons, usually snow), how far below the roof does that conduit have to > be? Secured to the bottom of a rafter or top chord OK? Distance > from???restrictions? > > TIA, > > Bill > > Feather River Solar Electric > Bill Battagin, Owner > 4291 Nelson St. > Taylorsville, CA 95983 > 530.284.7849 > CA Lic 874049 > www.frenergy.net > > > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
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