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A 10-75 is a working fire (i.e., there is fire visible from a building), the 10-76/10-77 assignments are the alarm levels separate from the first alarm, second alarm, third alarms, etc. that are the standard fire department responses to fires in high-rise buildings.
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.
Many modern fire alarm pull stations are single-action and only require the user to pull down a handle to sound the alarm. Other fire alarm pull stations are dual-action, and as such require the user to perform a second task before pulling down, such as lifting or pushing in a panel on the station or breaking a glass panel with an attached hammer.
In some small fire departments, the only alarm may be a telephone for receiving calls. Many fire stations were built with the living quarters above the garage. This arrangement is common for fire stations built in a crowded city. The fireman's pole was invented to allow firefighters to quickly descend to the garage.
Smoke detector mounted on a ceiling. A smoke detector is a device that senses smoke, typically as an indicator of fire.Smoke detectors/alarms are usually housed in plastic enclosures, typically shaped like a disk about 125 millimetres (5 in) in diameter and 25 millimetres (1 in) thick, but shape and size vary.
A Box Alarms or General Alarm is the other main assignment utilized by the San Antonio Fire Department. A Box Alarm is the standard protocol response for reported fires in high occupancy types, i.e. a hospital, nursing home, commercial building, strip mall, theater or other potentially high risk structure.
Coded panels were the earliest type of central fire alarm control, and were made during the 1800s to the 1970s. A coded panel is similar in many ways to a modern conventional panel (described below), except each zone was connected to its own code wheel, which, depending on the way the panel was set up, would either do sets of four rounds of code until the initiating pull station was reset ...
Effective January 1, 2014, section 18.4.5.3 of the 2010 and later editions of NFPA 72 requires the mid frequency audible fire alarm signal in occupancy sleeping areas with a protected premises (building) fire alarm system.