FACP Power Supply & Battery Systems 3

Question 1

In fire alarm terminology, what does 'NAC' stand for?

Accepted Answer

Notification Appliance Circuit

Answer

NAC stands for Notification Appliance Circuit, which is the output circuit that supplies power to horns, strobes, speakers, and other occupant notification devices.

Question 2

How is a 'power-limited' fire alarm circuit defined under NEC Article 760?

Accepted Answer

A circuit whose power is restricted to specified voltage and current levels by the listed control equipment

Answer

Per NEC Article 760, power-limited fire alarm circuits have their output power restricted to defined levels by the listed control equipment, allowing reduced wiring installation requirements.

Question 3

What is the purpose of an auxiliary (booster) power supply in an FACP system?

Accepted Answer

To provide additional 24 VDC current capacity when the FACP built-in supply cannot support all field devices

Answer

An auxiliary power supply supplements the FACP's built-in power when the total current draw of connected field devices exceeds the panel's rated output capacity.

Question 4

What is the correct battery capacity formula for a non-sprinklered building using the standard NFPA 72 calculation method?

Accepted Answer

(Standby current × 60 h + alarm current × 5/60 h) ÷ 0.80

Answer

For non-sprinklered buildings, required battery capacity = (standby current × 60 hours + alarm current × 5/60 hours) ÷ 0.80 derating factor.

Question 5

Where must an FACP's secondary power supply (batteries) be located per NFPA 72?

Accepted Answer

In the FACP enclosure or in the same room or general area as the FACP

Answer

NFPA 72 requires batteries to be housed in the FACP cabinet or located in the same room or general area as the FACP to ensure accessibility and proper supervision.

FACP - Fire Alarm Control Panel Certification Practice Test

FACP - Fire Alarm Control Panel Certification Practice Test

FACP Power Supply & Battery Systems 3