dissonant
Member
- Location
- Honolulu, HI
- Occupation
- Electrical Engineer
What is everyone's interpretation of the wording from the 2017 NEC 705.12(B)(2)(3) when it states "One of the methods that follow shall be used to determine the ratings of busbars in panelboards"
Does this mean that you must select only 1 method to use for every panelboard the PV system is connected to? Or can it be interpreted it to mean you can select one method for one panelboard in the system and another method for another panelboard in the PV system?
For my particular case, I am looking at using 705.12(B)(2)(3)(c) for the panel that the inverters are connected to (only inverter breakers on this panel) and then 705.12(B)(2)(3)(b) for the panel that feeds the inverter panel.
Does this mean that you must select only 1 method to use for every panelboard the PV system is connected to? Or can it be interpreted it to mean you can select one method for one panelboard in the system and another method for another panelboard in the PV system?
For my particular case, I am looking at using 705.12(B)(2)(3)(c) for the panel that the inverters are connected to (only inverter breakers on this panel) and then 705.12(B)(2)(3)(b) for the panel that feeds the inverter panel.