In new construction, NFPA 72 requires a smoke detector in each sleeping room. Additionally, in new construction, all detectors must be interconnected so that when one detector activates, all detectors sound the alarm. Fire alarm systems must produce an alarm signal that is different from all other signals. This signal may not be used for other purposes. Testing and maintenance of fire alarm systems is the responsibility of the property owner.
Smoke detectors require an annual functional test and periodic sensitivity testing.
History of NFPA 72 NFPA's signaling standards date back to 1898, only two years after the Association was founded. The 1993 Edition of NFPA 72 consolidates five signaling standards and NFPA 74, Standard for the Installation, Maintenance and Use of Household Fire Warning Equipment. Today, more than 225 members and alternates of seven NFPA technical committees help develop the National Fire Alarm Code.