Brake horsepower
Brake horsepower means the sum of the alternator/generator input horsepower and the mechanical accessory horsepower, excluding any power used to circulate engine coolant, circulate engine lubricant, or to supply fuel to the engine.
Source
40 CFR § 92.2
Scoping language
The definitions of this section apply to this subpart. They also apply to all subparts of this part, except where noted otherwise.