Actuation in a fire alarm system typically includes which of the following?

• A. Manual fire alarm initiation
• B. Automatic detection
• C. Extinguishing system operation
• D. All of the above

Answer: (D)

Actuation means any action that starts the fire protection system’s response. Manual fire alarm initiation is actuation because pulling a manual station sends a signal to the control panel and begins the alarm, notification, and safety actions. Automatic detection is actuation as detectors sense conditions and automatically trigger the alarm and responses. Extinguishing system operation is actuation too, since releasing or activating a suppression system initiates its response and is coordinated with the alarm. Because actuation covers all the ways the system can be triggered, the typical actuation includes all of the above.