Feeders and service conductors whose calculated load is determined by this optional calculation shall be permitted to have the neutral load determined by 220.61. Where the building or structure load is calculated by this optional method, feeders within the building or structure shall have ampacity as permitted in Part III of this article; however, the ampacity of an individual feeder shall not be required to be larger than the ampacity for the entire building.
This section shall not apply to portable classroom buildings.
|Connected Load||Demand Factor (Percent)|
|First 33 VA/m2 Plus,||(3 VA/ft2) at||100|
|Over 33 through 220 VA/m2 Plus,||(3 through 20 VA/ft2) at||75|
|Remainder over 220 VA/m2||(20 VA/ft2) at||25|