Hi Nick, I may not be entirely clear on your situation, but I interpret 690.64(B)(2), literally or otherwise, as meaning a busbar, or a conductor used in the SAME WAY as a busbar, rather than as a feeder. By that, I mean the conductor would have the solar breaker's energy tapped into it in such a way that the conductor downstream of the tap could at times see the sum of the solar current and grid current exceed the conductors ampacity.
Dick Ratico Solarwind Electric --- You wrote: if you read 690.64b it does mention both the buss rating AND conductors. for years and years I thought it was just for the buss rating until i got called recently for the feeders being undersized and unable to accommodate the solar within 120%. I see a lot of sentiments in this thread that it is only for busing, and I would really like to discover a reference to that. Someone told me something about the difference of having main lugs and main breakers in the sub panel... i am looking into it. >From the literal of 690.64 it would seem that if you are fed with #4 than you are stuck with 120% of 100a regardless of the sub panel rating. nick --- end of quote --- _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org 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
