Fire pumps shall be supervised for which conditions?

Fire pumps shall be supervised for which conditions?

• A. Loss of power
• B. Phase reversal
• C. Pump run
• D. Loss of power, phase reversal, and pump run

Answer: (D)

Supervising a fire pump means continuously monitoring three critical things: the power supply, the phase sequence, and the pump’s running state. If power is lost, the pump cannot operate, so detecting that loss and raising an alert is essential. Phase reversal in a three-phase supply can cause the motor to rotate in the wrong direction or fail to start properly; catching this issue prevents a silent, nonfunctional pump. And you must confirm that when a start signal is given, the pump actually runs; otherwise a commanded start could fail to produce pumping action due to mechanical or electrical faults. Covering all three conditions ensures that any fault—power loss, incorrect wiring phase, or failure to run—triggers an alarm and prompt corrective action. That’s why the best answer includes supervision of loss of power, phase reversal, and pump run.

Supervising a fire pump means continuously monitoring three critical things: the power supply, the phase sequence, and the pump’s running state. If power is lost, the pump cannot operate, so detecting that loss and raising an alert is essential. Phase reversal in a three-phase supply can cause the motor to rotate in the wrong direction or fail to start properly; catching this issue prevents a silent, nonfunctional pump. And you must confirm that when a start signal is given, the pump actually runs; otherwise a commanded start could fail to produce pumping action due to mechanical or electrical faults.

Covering all three conditions ensures that any fault—power loss, incorrect wiring phase, or failure to run—triggers an alarm and prompt corrective action. That’s why the best answer includes supervision of loss of power, phase reversal, and pump run.