NFPA 72 National Fire Alarm and Signaling Code 23.8.1.3 Positive Alarm Sequence. 23.8.1.3.1 Systems that have positive alarm features complying with 23.8.1.3 shall be permitted if approved by the authority having jurisdiction. 23.8.1.3.1.1 The positive alarm sequence operation shall comply with the following: (1) To initiate the positive alarm sequence operation, the signal from an automatic fire detection device selected for positive alarm sequence operation shall be acknowledged at the fire al
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