Al,
SMA has a good whitepaper on their site covering this, and there was an article in a recent Solar Pro covering this topic as well. Good Luck! Glenn Burt From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Al Frishman Sent: Tuesday, December 07, 2010 5:51 AM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] NEC 690.64 (B) (2) 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: 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
