[RE-wrenches] NEC 690.64 (B) (2)

[Al Frishman]

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

 

 

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