What term describes a power source that is independent of the primary power supply?

What term describes a power source that is independent of the primary power supply?

• A. Alternate Power
• B. Electric Motor
• C. Open Motor
• D. Guarded Motor

Answer: (A)

Alternate power describes a secondary source of electrical energy that can supply the fire pump when the main power is unavailable. This ensures the pump can start and run during an outage, meeting requirements for emergency or standby operation with sources like an emergency generator or other independent power systems. An electric motor is a device that uses electrical energy to produce motion, not a source of power itself. Open motor and guarded motor refer to motor construction or protection, not to the power supply arrangement, so they don’t describe an independent power source.

Alternate power describes a secondary source of electrical energy that can supply the fire pump when the main power is unavailable. This ensures the pump can start and run during an outage, meeting requirements for emergency or standby operation with sources like an emergency generator or other independent power systems. An electric motor is a device that uses electrical energy to produce motion, not a source of power itself. Open motor and guarded motor refer to motor construction or protection, not to the power supply arrangement, so they don’t describe an independent power source.