Fire alarm system_nec_september[1]

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Fire alarm system_nec_september[1]

  1. 1. FIRE ALARM SYSTEM The Basics NFPA 72 National Fire Alarm Code® 2007 Not a Code unless adapted by AHJ NFPA 101 Life Safety Code® 2006 Not a Code unless adapted by AHJ
  2. 2. 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.
  3. 3. 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.”
  4. 4. Fire Alarm System
  5. 5. Fire Alarm System
  6. 6. Fire Alarm System
  7. 7. Fire Alarm System
  8. 8. Fire Alarm System
  9. 9. Visible Signaling Terminology     Candela (cd) Candela effective (cd eff.) Direct signaling Indirect signaling
  10. 10. Visible Signaling   Strobes Not just Strobes  Textual  Graphical Mass Notification.
  11. 11. Truth or Consequences Visible Signaling  NFPA 72  Prescriptive requirements  Performance requirements Do Not Agree
  12. 12. Fire Alarm System
  13. 13. Fire Alarm System
  14. 14. Fire Alarm System
  15. 15. Fire Alarm System
  16. 16. Fire Alarm System
  17. 17. 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
  18. 18. Fire Alarm System
  19. 19. Sleeping Areas  16 feet max between  110 or 177 cd eff
  20. 20. Visible Appliance Synchronization Appliance flash rate limited by U.L. If more than two applieances can be viewedsynchronize If more than two synchronized groups can be viewed – synchronize the synchronized groups If more than two synchronized systems can be viewed – synchronize the synchronized systems Not required for viewing from outside.
  21. 21. Visual Signaling in Large Spaces
  22. 22. Fire Alarm System
  23. 23. Fire Alarm System
  24. 24. Fire Alarm System
  25. 25. Fire Alarm System

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