Fire Alarm Cause And Effect Matrix -
This document explains what the matrix is, how to read it, and provides a standard industry example typically used in commercial buildings, hospitals, and industrial facilities.
- The Effect at 2 PM (Office hours): Evacuate only the affected floor.
- The Effect at 2 AM (Empty building): Send a silent signal to central monitoring station. Do not evacuate (prevents exterior noise complaints).
5.2. Integration Points
The feature must assist compliance with: fire alarm cause and effect matrix
- Detection Criteria: Photoelectric smoke threshold = X% obscuration
- Alarm Class: Fire Alarm
- Notification: Horn/strobe in Zone A (Temporal-3)
- Panel Outputs: Zone A NAC energized; relay FA1 closes
- Annunciation: Zone A lit on FACU; remote annunciator displays "Zone A SMOKE"
- Controls: HVAC shutdown (AHU-1), elevator recall to Level 1, fire doors auto-close
- Suppression: No direct suppression command; waterflow supervised
- EVAC: Live/recorded area message for Zone A
- Monitoring: Transmit alarm to central station (CID)
- Reset: Manual reset at FACU after condition cleared
- Delay: 0s verification
- Fail-safe: Battery backup supplies NAC for 24 hours standby
- Logging: Event logged with timestamp & device ID
- Acceptance: Functional test: trigger detector → verify all listed actions
- Standards: NFPA 72, local code ref
Define expected automatic and manual responses of the fire alarm system for each initiating event to ensure correct, predictable actions for life safety, alarm notification, and system control. This document explains what the matrix is, how
