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The NFPA 72 (National Fire Alarm and Signaling Code) is a standard published by the National Fire Protection Association every 3 years for installation of fire alarm systems and emergency communication systems in the United States.
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From NFPA 72, 2002 Edition: “7.4.2.1* To ensure that audible public mode signals are clearly heard, unless otherwise permitted by 7.4.2.2 through 7.4.2.5, they shall have a sound level at least 15 dB above the average ambient sound level or 5 dB above the maximum sound level having a duration of at least 60 seconds, whichever is greater ...
At the time, there were nine such standards in effect within 100 miles (160 km) of Boston, Massachusetts, and such diversity was causing great difficulties for plumbers working in the New England region. [6] The next year, the committee published its initial report on a uniform standard, and went on to form the NFPA in late 1896.
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Download QR code; Print/export Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... NFPA 72; NFPA 704; NFPA 805; NFPA 921; NFPA 1001 ...
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Guide to Human Behavior in Fire, 2nd edition [9] Engineering Guide: Fire Safety for Very Tall Buildings [10] Guide for Substantiating a Fire Model for a Given Application [11] Guide for Peer Review in the Fire Protection Design Process [12] Performance-Based Fire Protection, 2nd Edition [13] Predicting Room of Origin Fire Hazards (Archived) [14]