2013 Maryland Code
PUBLIC SAFETY
§ 9-104 - General requirements for smoke detectors

§9-104.

(a) (1) Except as provided in paragraph (2) of this subsection and § 9-102(d) of this subtitle, smoke detection systems shall operate on an alternating current (AC) primary source of electric power.

(2) Smoke detection systems may operate on approved power supplies other than an alternating current (AC) primary source of electric power if:

(i) the power supply is approved by the State Fire Prevention Commission; and

(ii) it is clearly evident that reasonable safety is secured.

(b) Each approved smoke detector shall be installed so as not to exceed the lineal or square footage allowances specified for the smoke detector, based on the generally accepted test standards under which the smoke detector was tested and approved.

(c) Smoke detection systems, including specialized smoke detectors for the deaf and hearing impaired, shall be approved for the particular system and shall only be used for detection and signaling in the event of fire.

(d) Each lease for an existing residential dwelling unit that contains alternating current (AC) electric service shall contain a disclosure in 10-point bold type that states:

“This residential dwelling unit contains alternating current (AC) electric service. In the event of a power outage, an alternating current (AC) powered smoke detector will not provide an alarm. Therefore, the occupant should obtain a dual powered smoke detector or a battery powered smoke detector.”