Secondary Power Requirements

Test your knowledge of NFPA 72 2016 secondary power requirements.

1. Sealed lead-acid batteries must be replaced ________.

Correct Answer: When either C or D apply

2. The battery calculation safety margin for batteries used for fire alarm secondary power ________ percent.

Correct Answer: 20

3. A generator used for providing secondary power for a fire alarm system must meet the requirements of NFPA 110 for a Type 10, Class 24, Level 1 system. Type 10 requires ________.

Correct Answer: 10 minutes transfer (to standby) time

4. Secondary power capacity for shared equipment shall be permitted to have a capacity of ________ hours where acceptable to the authority having jurisdiction and where a risk analysis is performed to ensure acceptable availability is provided.

Correct Answer: 8

5. While operating on secondary power, audio amplifier monitoring shall be required only when an alarm is present.

Correct Answer: True

6. The secondary power supply for in-building mass notification systems shall be capable of operating the system under quiescent load for a minimum of 24 hours and then shall be capable of operating the system during emergency conditions for a period of ________ minutes at maximum connected load.

Correct Answer: 15

7. All fire alarm systems require batteries as part or all of its secondary power.

Correct Answer: True

8. Fire alarm systems for supervising stations require batteries as part or all of the secondary power.

Correct Answer: False

9. Batteries are ________ if they are offline and waiting to be put under load in the event of a loss of power.

Correct Answer: Trickle-charged

10. When performing charger tests for sealed lead-acid batteries, with the batteries fully charged and connected to the charger, measure the voltage across the batteries with a voltmeter. Verify the voltage is ________ volts per cell, ±0.02 volts at 77°F (25°C) or as specified by the manufacturer.

Correct Answer: 2.30