This edition of NFPA 72, National Fire Alarm and Signaling Code, was prepared by the TechnicalCommittees on Fundamentals of Fire Alarm and Signaling Systems, Testing and Maintenance of FireAlarm and Signaling Systems, Initiating Devices for Fire Alarm and Signaling Systems, NotificationAppliances for Fire Alarm and Signaling Systems, Protected Premises Fire Alarm and SignalingSystems, Emergency Communication Systems, Supervising Station Fire Alarm and Signaling Systems,Public Emergency Reporting Systems, and Single- and Multiple-Station Alarms and HouseholdSignaling Systems, released by the Correlating Committee on Signaling Systems for the Protection ofLife and Property, and acted on by NFPA at its June Association Technical Meeting held June 11-14,2018, in Las Vegas, NV. It was issued by the Standards Council on August 14, 2018, with an effectivedate of September 3, 2018, and supersedes all previous editions.This document has been amended by one or more Tentative Interim Amendments (TIAs) and/orErrata. See "Codes & Standards" at www.nfpa.org for more information.This edition of NFPA 72 was approved as an American National Standard on September 3, 2018.