FACP Power Supply & Battery Systems 3

Question 1

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

Accepted Answer

Notification Appliance Circuit

Answer

Network Access Controller

Answer

Non-Addressable Control

Answer

Neutral AC Connection

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

A circuit with output power limited to 100 watts maximum

Answer

A circuit that can only power devices drawing less than 1 ampere

Answer

A circuit powered exclusively by batteries

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

To replace the primary AC power supply during outages

Answer

To charge the backup batteries at a faster rate

Answer

To power only the FACP CPU and memory boards

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

(Standby current × 24 h + alarm current × 5 min) ÷ 0.80

Answer

Total current × 48 h

Answer

Peak alarm current × 60 h ÷ 0.75

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

In a dedicated battery room separate from the FACP

Answer

In the building's main electrical room regardless of FACP location

Answer

Within 10 feet of the main service entrance panel

Question 6

What is the typical ampere-hour (Ah) rating of sealed lead-acid batteries used in a small to medium commercial FACP?

Accepted Answer

7–18 Ah

Answer

1–2 Ah

Answer

50–100 Ah

Answer

200+ Ah

Question 7

What tests are required on FACP batteries during the annual inspection per NFPA 72?

Accepted Answer

Load voltage test and capacity (discharge) test

Answer

Specific gravity measurement only

Answer

Visual inspection for corrosion only

Answer

Replacement of all batteries regardless of condition