Fire Alarm Cause And Effect Matrix -

Without a matrix, programmers guess. Guessing leads to disaster. For example:

| | OUTPUT 1: Local Alarm (Floor) | OUTPUT 2: Building Evacuation | OUTPUT 3: HVAC Shutdown | OUTPUT 4: Elevator Recall | OUTPUT 5: Fire Dept. Notification | | :--- | :---: | :---: | :---: | :---: | :---: | | Manual Pull Station (Any) | -- | X | X | X | X | | Smoke Detector (Lobby) | -- | X | X | X | X | | Smoke Detector (Floor 1 Office) | X | -- | -- | -- | X | | Smoke Detector (Floor 2 Office) | X | -- | -- | -- | X | | Smoke Detector (Mech. Penthouse) | -- | X | X | -- | X | | Duct Smoke Detector | -- | -- | X | -- | X | | Waterflow Switch (Sprinkler) | -- | X | -- | -- | X | fire alarm cause and effect matrix

If you answered "No" to any of the above, your fire alarm system is not a safety system; it is a liability waiting to happen. The Cause and Effect Matrix is the brain of your building's defense against fire. Treat it with the respect it deserves, audit it annually, and test it quarterly. Without a matrix, programmers guess

Even experienced engineers get the C&E wrong. Here are the top three failures: Notification | | :--- | :---: | :---:

Cause: Smoke detector + People counting camera sees 50 people in a dead-end corridor. Effect: Activate directional sounders pointing people away from the fire, not just the standard nearest exit.