I had a similar problem with PVC pre-installed through a roof. It was big enough pipe to run flex through and pull our PV runs.
As to the requirement to use metallic, I haven’t had my second cup of coffee yet so I won’t comment. William Miller Miller Solar.com 805-438-5600 www.millersolar.com On Wed, May 20, 2026 at 10:36 AM Mick Abraham via RE-wrenches < [email protected]> wrote: > Hi, Mechanics ~ > > The general contractor put in a 2" PVC pipe before pouring the slab. The > pipe has a 90 degree sweep so there's a vertical pipe stub. > He thought there would be no code inspections for this remote property... > oops. > > I now must use this plastic pipe for incoming PV wires. These wires will > terminate on a MidNite Power MN15‑12KW‑AIO, so question one: > Without embarrassing myself, can I argue that this qualifies for the > exemption as a PV ICS (Photovoltaic Integrated Control System)? > The PV arrays will be on top of an open horse shed, so I don't plan on any > form of "rapid shutdown". > > Assuming that the above exemption won't get me off the hook, what are your > suggestions for retrofit? My five wires could comfortably fit 1" trade size > EMT > conduit. If I cut the PVC stub then glue on a male adapter (so I could > mount a metal box low to the floor), there's still some unprotected plastic > due to the hub of the male adapter. > > Also: what would have been better initial tradecraft in a non-retrofit > slab situation, assuming that one wants to use PVC for most of the pipe run > while still satisfying > NEC 690.31(D) (1)? > > Thanks in advance, Mechanix. "The Wrench List is the Bomb!" > > Mick Abraham, Proprietor > www.abrahamsolar.com > > Cell phone or for text messaging: 970-946-6584 > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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