5 mins of alarm under battery power

[ccs46]

@kcin556

It is a requirement that the fire alarm system must still be able to support a full 5 minute alarm condition after 24 hours on battery backup. It is a factor that goes into the backup battery calculations when a system is installed.

So let’s say the power went out 24 hours earlier and then a fire is detected. The system must maintain the alarm condition (notification appliances sounding, strobes flashing, etc) for a minimum of 5 minutes without the batteries dying.

Keep in mind this is based on the worst case scenario possible: backup batteries close to or at the end of their useful life, full load on the system, full 24 hours power failure before the alarm, etc.

Oh wow! I never knew that it had to be 5 minutes after a power failure lasting 24 hours! :shock: