A Protected Premises System operating under secondary power must be capable of _______.

A Protected Premises System operating under secondary power must be capable of _______.

• A. 8 hours under normal operation and 30 seconds in alarm.
• B. 12 hours under normal operation and 4 minutes in alarm.
• C. 24 hours under normal operation and 5 minutes in alarm.
• D. 72 hours in standby.

Answer: (C)

When a Protected Premises System runs on secondary power, the backup power must keep the system functioning for 24 hours in normal operation and for at least 5 minutes when an alarm occurs. This ensures continuous monitoring and reliable notification during a power outage: the system can keep devices energized and communicate status for a full day, and it can sustain audible/visual alarms for a brief period to alert occupants and support response efforts after power loss. The other timeframes (8 or 12 hours, or 72 hours) don’t meet the standard standby requirements and aren’t sufficient or appropriate for typical PPS backup loads.

When a Protected Premises System runs on secondary power, the backup power must keep the system functioning for 24 hours in normal operation and for at least 5 minutes when an alarm occurs. This ensures continuous monitoring and reliable notification during a power outage: the system can keep devices energized and communicate status for a full day, and it can sustain audible/visual alarms for a brief period to alert occupants and support response efforts after power loss. The other timeframes (8 or 12 hours, or 72 hours) don’t meet the standard standby requirements and aren’t sufficient or appropriate for typical PPS backup loads.