We just went through a similar scenario connecting between a 600A main breaker and five subpanels that were tapped off conductors in a wiring trough. In this case it was a load side interconnection, so the 120% rule applied. We tapped the conductors in the trough and went to our solar fusible disconnect. The parallel conductors in the trough needed to be sized to carry no more than 120% of the load from the 600A main and the 150A solar disconnect, which required upsizing the conductors to 625A parallel capacity. There was no issue with interconnecting with parallel conductors from the solar disconnect as you suggested.
On the supply side you have it easier, not needing to comply with the 120% rule. I don't think you will have any issue unless your PV inverter output rating is greater than 600A! Jason Szumlanski Florida Solar Design Group On Wed, Apr 8, 2015 at 9:58 PM, Corey Shalanski <[email protected]> wrote: > Wrenches, > > We are developing the design for an upcoming commercial project with the > following service equipment: > - MDP: 600A, main-lug, 6 main disconnect breakers, parallel 350kcmil > service conductors feeding each main lug > > Would anything prevent a supply side interconnection in this scenario? (I > understand that we would need to interconnect on *both* conductors in each > parallel pair) > > -- > Corey Shalanski > Joule Energy > New Orleans, LA > > _______________________________________________ > 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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