Maybe you can put in a smaller main breaker? Jesse
Sent from my iPhone On Sep 29, 2011, at 1:39 PM, "Glenn Burt" <[email protected]> wrote: > How about feeding both systems into an AC combining subpanel before feeding > the main load center? > > Often the calculations required will allow you to do more backfeeding than > the simple backfeeding a load center with individual breakers. > > > > -Glenn > > > > From: [email protected] > [mailto:[email protected]] On Behalf Of Jason > Szumlanski > Sent: Thursday, September 29, 2011 11:49 AM > To: RE-wrenches > Subject: [RE-wrenches] Adding on to existing PV System > > > > We’ve been contracted to add on to an existing PV system in a residence. The > existing system has a 30A 2P Breaker on a 200A rated panel with a 200A main > breaker. The new system would require a 15A breaker, which would exceed the > limit in NEC 690.64(B)(2). > > > > The existing system has a fusible AC disconnect mounted next to the meter. > This was originally intended as the utility external disconnect. The utility > no longer requires a disconnect, but if we do a supply side connection, we > would need a fusible AC disconnect anyway for the new system. I would > collocate the new disconnect with the old. > > > > Does anyone see any problem with doing a supply size connection for the new > system? Any labeling snags that I might need to consider? > > > > Jason Szumlanski > > Fafco Solar > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > 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 >
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