20:10:39:15Requirements

for load boxes. A load box is a primarily non-inductive nominal 240 volt, resistance heating type load with a minimum nominal full load of 18 kilowatts. A load box must be capable of operating at 2 or more load settings, including approximately 50 percent and 100 percent of the load box's rated total load.

Source: 42 SDR 174, effective June 21, 2016.