Actually, the article ³Can We Land² by Ryan LeBlanc and Tarn Yates probably has the best discussion of 690.64(B)(2) issues in particular:
http://solarprofessional.com/article/?file=SP2_4_pg24_LeBlanc&search= Diagrams 2a & bm for example, should compliment the calculations in the Hamon article. DC On 12/7/10 4:51 AM, "Al Frishman" <[email protected]> wrote: > Wrenches, > How do you apply NEC 690.64 (B) (2) when you have multiple single phase > inverters distributed across the 3 phases of an electric-panel via 2 pole > breakers? > > Do you simply add up the total of all over-current devices feeding the > panel (Inverter 2-pole breakers and main breaker) or is there a 3 phase > formula that gets applied? > > It seems logical that if the single phase inverters are connected with 2-pole > breakers > Distributed across the 3 phases then you would take the sum of what is on each > phase. > > Any and all input on this topic is appreciated. > > Regards, > Al > Aeonsolar > 917 699 6641 > > > > > _______________________________________________ > 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 > David Brearley, Senior Technical Editor SolarPro magazine NABCEP Certified PV Installer [email protected] Direct: 541.261.6545 Fax: 541.512.0343 Visit our Web site at solarprofessional.com (Sample copy available for download at: solarprofessional.com/sample)
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