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An optical beam smoke detector is a device that uses a projected beam of light to detect smoke across large areas, [1] typically as an indicator of fire. [2] They are used to detect fires in buildings where standard point smoke detectors would either be uneconomical [3] or restricted for use by the height of the building.
The NFPA 72 "covers the application, installation, location, performance, inspection, testing, and maintenance of fire alarm systems, supervising station alarm systems, public emergency alarm reporting systems, fire warning equipment and emergency communications systems (ECS), and their components."
A group of students at James Madison University evacuate their dorm rooms in response to a fire drill. The purpose of fire drills in buildings is to ensure that everyone knows how to exit safely as quickly as possible if a fire, smoke, carbon monoxide, or other emergency occurs, and to familiarize building occupants with the sound of the fire alarm.
The alarm transmission methods covered under UL 365 can be categorized under standard line security or encrypted line security. The systems are required to operate within the limits of Class 2 remote control and signal circuits as defined by the National Electrical Code, NFPA 70.
Alarm - raise the alarm and alert persons to the presence of fire. C onfine - shut doors and reduce airflow and fuel sources to the fire, to reduce its spread. E xtinguish or E vacuate - extinguish the fire if it's safe to do so, or coordinate the evacuation from the area.
A fire alarm control panel Fire alarm speaker and pull station. Fire alarm systems are composed of several distinct parts: Fire alarm control panel (FACP), or fire alarm control unit (FACU): This component, the hub of the system, monitors inputs and system integrity, controls outputs, and transmits information.
In most cases, once the alarm has been triggered by fire or smoke, a loud sound emanates to warn of danger or a message notifies the local fire department. Smoke alarms, also known as smoke detectors, generally sound an audible and visual alarm. Smoke alarms are usually housed in a disk-shaped plastic enclosure about 6 inches in diameter and 1 ...
Alert or Alarm - Raise the alarm by triggering a fire alarm. Alert nearby persons to gain assistance in fighting the fire or alerting other people. Alert emergency services, site security and other emergency contacts as necessary. Confine or Contain - Contain the spread of the fire by closing nearby doors and windows if it is safe to do so. The ...