My inspector tells me that I am required to size my AC disconnect at 125% of the "calculated load" I am using a 30 amp disco to disconnect a maximum inverter output of 27 amps.
He is referencing 225.39 Here is my argument why my practice is acceptable . Please tell me I am wrong about this. Always happy to be educated.
Here is what I see….
Your starting place 225.39 "rating of disconnect" to be determined by parts 1 ,2 3 or 4 of article 220.
Article 220… article 220.3 ( additional load calculation references) Application of other articles… In other articles applying the loads in specialized applications there are requirements provided in table 220.3 that are in addition to or modification of those within this article ….. "solar circuit sizing and current" 690.8
690-8 Circuit sizing and current..
Calculation of maximum circuit current. The maximum current for a specific circuit shall calculated in accordance with 690.8(A) (1) through (A)(5) (A)(3) INVERTER OUTPUT " THE MAXIMUM CURRENT SHALL BE THE MAXIMUM INVERTER CONTINOUS OUTPUT RATING."
Later in 690.9 there are specific references to "overcurrent protection" and conductor sizing A different set of calculations entirely.
I am just talking about equipment here.. Comments?
He is referencing 225.39 Here is my argument why my practice is acceptable . Please tell me I am wrong about this. Always happy to be educated.
Here is what I see….
Your starting place 225.39 "rating of disconnect" to be determined by parts 1 ,2 3 or 4 of article 220.
Article 220… article 220.3 ( additional load calculation references) Application of other articles… In other articles applying the loads in specialized applications there are requirements provided in table 220.3 that are in addition to or modification of those within this article ….. "solar circuit sizing and current" 690.8
690-8 Circuit sizing and current..
Calculation of maximum circuit current. The maximum current for a specific circuit shall calculated in accordance with 690.8(A) (1) through (A)(5) (A)(3) INVERTER OUTPUT " THE MAXIMUM CURRENT SHALL BE THE MAXIMUM INVERTER CONTINOUS OUTPUT RATING."
Later in 690.9 there are specific references to "overcurrent protection" and conductor sizing A different set of calculations entirely.
I am just talking about equipment here.. Comments?