Section 6633 - Smoke detector installation; other residential occupancies(a) Each lodging, rooming or boarding house; hotel, motel, bed and breakfast facility; dormitory; apartment or multi-family dwelling; board and care facility; or a residential occupancy by any other name shall have smoke detection devices and/or smoke detection systems installed in conformance to the standards of the State Fire Prevention Regulations and the building codes pursuant to the specifications for the individual occupancies or use.(b) Where there is a conflict between installation requirements, this section shall be interpreted to require the more strict of the installation specifications, for a particular occupancy.(c) All required smoke detection devices and/or smoke detection systems listed in subsection (a) of this section, except as otherwise specified herein, shall be inter-connected, so that operation of any smoke detection device shall cause the alarm-sounding devices in all smoke detection devices within the building, occupancy or within a separate zoned area to sound; or that will initiate the building fire alarm system to provide an audible warning to all occupants of the building, and all such smoke detection devices and/or systems shall be hard-wired into the electric system of the building, in accordance with the National Electric Code.(d) With approval of the Fire Marshal, smoke detection devices in individual sleeping rooms may be excepted from the requirement that smoke detection devices be interconnected if such building or occupancy is provided with an automatic smoke detection system in the hallways, corridors or stairwells, or is connected to a building fire alarm system which will activate an alarm which is sufficiently audible to warn the occupants of the building of the impending danger of fire or hazard to life.(e) For all buildings or occupancies which under subsection (a) of this section are required to install smoke detection devices and/or smoke detection systems, and for such buildings or occupancies that do not have an auxiliary, emergency or back-up power system in accordance with State Fire Prevention Regulations, each smoke detection device or smoke detection system shall utilize the type of smoke detection device that has a built-in battery back-up power supply.(f) The plans and specifications for all smoke detection devices and/or systems required by this subsection shall be submitted to the State Fire Marshal's Office, prior to installation, for review and approval in accordance with § 6612 of this title.69 Del. Laws, c. 170, § 2; 71 Del. Laws, c. 219, § 4; 77 Del. Laws, c. 444, §§ 3, 6.;