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In: (i) all buildings erected or converted to residential use, and (ii) all dwelling units substantially altered, on or after January 1, 2018, smoke alarms shall also comply with the following requirements:
(a) Standards for listing and installation. Single- and multiple-station smoke alarms shall be listed in accordance with UL 217-06 and installed in accordance with NFPA 72-13.
(b) Required locations. Single- or multiple-station smoke alarms shall be installed and maintained, regardless of occupant load, at all of the following locations:
(1) On the ceiling or wall outside of each sleeping area in the immediate vicinity of bedrooms.
(2) In each room used for sleeping purposes.
(3) In each story within a dwelling unit, including basements, but not including crawl spaces and uninhabitable attics. In dwellings or dwelling units with split levels and without an intervening door between the adjacent levels, a smoke alarm installed on the upper level shall suffice for the adjacent lower level, provided that the lower level is less than one full story below the upper level.
(c) Interconnection. Where more than one smoke alarm is required to be installed within an individual dwelling unit or sleeping area other than a dwelling unit, the smoke alarms shall be interconnected in such a manner that the activation of one alarm will activate all of the alarms in the individual unit. Physical interconnection of smoke alarms shall not be required where listed wireless alarms are installed and all alarms sound upon activation of one alarm. The alarm shall be clearly audible in all bedrooms over background noise with all intervening doors closed.
(d) Power source. In new construction, required smoke alarms shall receive their primary power from the building wiring and shall be equipped with a battery backup. Smoke alarms with integral strobes that are not equipped with battery backup shall be connected to an emergency electrical system in accordance with 14E-7-700. Smoke alarms shall emit a signal when the batteries are low. Wiring shall be permanent and without a disconnecting switch other than as required for overcurrent protection.
Exception: Smoke alarms are not required to be equipped with battery backup where they are connected to an emergency electrical system that complies with Section 14E-7-700.
(Added Coun. J. 9-6-17, p. 55278, Art. VI, § 13)