Light Duty
Characteristics: Annual operating hours <= 1.000; Percentage of time at full load: <= 20%; Average load application: <= 50%
Medium Duty
Characteristics: Annual operating hours <= 3.000; Percentage of time at full load: <= 50%; Average load application: <= 70%
Heavy Duty
Characteristics: Annual operating hours: Unlimited; Percentage of time at full load: <= 100%; Average load application: <= 100%