fire alarm system_nec_september[1]
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FIRE ALARM SYSTEMThe Basics
NFPA 72 National Fire Alarm Code® 2007Not a Code unless adapted by AHJ
NFPA 101 Life Safety Code® 2006Not a Code unless adapted by AHJ
FIRE ALARM SYSTEM
NFPA 101 Life Safety Code®2006 “The purpose of the code is to provide minimum
requirements, with regard to function, for the design, operation and maintenance of buildings or structures for safety of life from fire”
This is accomplished by: 1.) Protection of occupants not intimate with the
Initial fire development 2.) Improvement of the survivability of occupants intimate
with the initial fire development.
FIRE ALARM SYSTEM
NFPA 72 “The purpose of this code is to define the
means of signal initiation, transmission, notification, and annunciation; the levels of performance; and the reliability of the various types of fire alarm systems.”
“The purpose of fire alarm systems shall be primarily to provide notification of fire alarm, supervisory, and trouble conditions; to alert the occupants; to summon aid; and to control fire safety functions.”
Fire Alarm System
Fire Alarm System
Fire Alarm System
Fire Alarm System
Fire Alarm System
Visible Signaling Terminology
Candela (cd) Candela effective
(cd eff.) Direct signaling Indirect signaling
Visible Signaling
Strobes Not just Strobes
Textual Graphical
Mass Notification.
Truth or ConsequencesVisible Signaling
NFPA 72 Prescriptive requirements Do Not Performance requirements Agree
Fire Alarm System
Fire Alarm System
Fire Alarm System
Fire Alarm System
Fire Alarm System
Visible Signaling in Corridors
Direct signaling For corridors no wider thatn 20ft
Appliances rated at not less thatn 15 cd Located no more than 15 fr from end Separation not greater than 100 ft
between appliances Any interruptions in viewing path treated
as separate areas
Fire Alarm System
Sleeping Areas
16 feet max between
110 or 177 cd eff
Visible Appliance Synchronization
Appliance flash rate limited by U.L.If more than two applieances can be viewed-synchronizeIf more than two synchronized groups can be viewed – synchronize the synchronized groupsIf more than two synchronized systems can be viewed – synchronize the synchronized systemsNot required for viewing from outside.
Visual Signaling in LargeSpaces
Fire Alarm System
Fire Alarm System
Fire Alarm System
Fire Alarm System
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