STE – Fire Safety

FIRE ALARM SYSTEMS

A fire alarm system has a number of devices working together to detect and warn people through visual and audio appliances when smokefirecarbon monoxide or other emergencies are present. These alarms may be activated automatically from smoke detectors, and heat detectors or may also be activated via manual fire alarm activation devices such as manual call points or pull stations.

Alarms can be either motorized bells or wall mountable sounders or horns. They can also be speaker strobes which sound an alarm, followed by a voice evacuation message which warns people inside the building not to use the elevators. Fire alarm sounders can be set to certain frequencies and different tones including low, medium and high, depending on the country and manufacturer of the device.

Most fire alarm systems in Europe sound like a siren with alternating frequencies.

FIRE EXTINGUISHERS

A fire extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations.

It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i.e., no escape route, smoke, explosion hazard, etc.), or otherwise requires the expertise of a fire brigade.

Typically, a fire extinguisher consists of a hand-held cylindrical pressure vessel containing an agent which can be discharged to extinguish a fire. Fire extinguishers manufactured with non-cylindrical pressure vessels also exist but are less common.

EMERGENCY LIGHTING SYSTEMS

An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage.

Emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitoriesapartments, and hotels. Most building codes require that they be installed in older buildings as well.

Incandescent light bulbs were originally used in emergency lights, before fluorescent lights and later light-emitting diodes (LEDs) superseded them in the 21st century.

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