Search results with tag "Alarm signal"

National Fire Alarm and Signaling Code - AFAA-NE - Home

Nov 18, 2015 · interface devices controlled by the fire alarm system to be ... Major Changes –Chapter 17 Initiating Devices nfpa.org. NFPA 72-2016 Changes ... the sleeping areas to awaken occupants shall produce a low frequency alarm signal that complies with the following: (1) The alarm signal shall be a square wave or provide equivalent awakening ability. ...

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