USCG Exam PracticeMotor controllers and remote control
Under 46 CFR §111.70-3, a motor controller for a fire pump must have low-voltage release rather than low-voltage protection under which condition?
- ✓ When automatic restart after a voltage failure or resumption of operation is not hazardousCorrect
- B. When the fire pump motor is less than 2 horsepower (1.5 kW)
- C. When the fire pump can be restarted from a central control station
- D. When the starting current of the fire pump exceeds the capacity of one ship's service generator
Why A is correct
46 CFR §111.70-3(b) requires low-voltage release for fire pump controllers when automatic restart after a voltage failure or its resumption to operation is not hazardous. If automatic restart is hazardous, low-voltage protection is required instead. The central control station exception applies to vital propulsion auxiliaries, not fire pumps.
Cited:46 CFR §111.70-3