Drake I think you’re right and they’re wrong, as long as the 200A bus is protected by a 200A breaker, and as long as the Utility meter and utility conductors remain 400 David
On Thu, Oct 12, 2023 at 5:06 PM Drake Chamberlin via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > We have a design where the conductors will come out of a 400 A meter base > to a junction box. Splices in the box will allow for the PV to feed the > meter. > > A maximum of 312 Amps can come from the inverters to feed the grid. > > The loads on the existing main service are significantly less than 200A. > The service is rated at 200 A, 3 phase delta. > > > > > The conductors from the meter would be rated at 400 A to the splice, as > would the conductors to the photovoltaic system. The conductors to the > existing service would be downsized to 200 A. > > We were told that the bus bar rating of the service must also be 400 A, > even though the output of the PV does not feed through that box. Is there a > rule that says this? What would be the logic? > > Thank you, > > Drake > > > *Drake Chamberlin* > > *Athens Electric LLC* > > *Ohio Electrical Contractor’s License 44810* > > *NABCEP Certified PV Installation Professional* > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > 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/re-wrenches@lists.re-wrenches.org/ > 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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