Here is the code for 1-3 unit houses built from June 1976 on.

CHAPTER 28.34
FIRE DETECTION SYSTEMS
Sec.
23-28.34-1. Fire detection systems required.
23-28.34-2. Minimum number of detectors.
23-28.34-3. Location of detectors.
23-28.34-4. Power supply and wiring methods.
23-28.34-5. Enforcement.
23-28.34-6. Homeowners responsible.
23-28.34-7. Penalty.
23-28.34-1. Fire detection systems required.
 

Statute text
All buildings hereinafter constructed or converted for residential occupancy shall be equipped with a smoke detection system listed and/or approved by the underwriters laboratories, inc., or factory mutual, installed according to standards set forth below, except that the systems shall not be required in buildings or structures subject to the provisions of the general laws relative to the installation of automatic fire warning systems connected thereto.
History
(P.L. 1976, ch. 238, § 1; P.L. 1992, ch. 91, § 1.)
Annotations
Comparative Legislation. - Smoke detectors:
Conn. Gen. Stat. §§ 29-292.
Mass. Ann. Laws ch. 148, § 26C et seq.
Collateral References. - Liability of person furnishing, installing, or servicing burglary or fire alarm system for burglary or fire loss. 37 A.L.R.4th 47.
 

23-28.34-2. Minimum number of detectors.

Statute text

(a) A minimum of one approved smoke detector shall be located in the highest habitable level and on each floor, level, or story.
(b) For any floor, level, or story exceeding twelve hundred square feet (1200 sq. ft.) in area, one approved smoke detector shall be provided for each twelve hundred square feet (1200 sq. ft.) or portion thereof or as specified by the manufacturer for the particular device.
History
(P.L. 1976, ch. 238, § 1; P.L. 1992, ch. 91, § 1.)

23-28.34-3. Location of detectors.

Statute text

(a) Approved smoke detectors shall be located outside each separate sleeping area in the immediate vicinity of the bedrooms and on each additional story of the living unit including basements and cellars and excluding crawl spaces and uninhabitable attics. Bedrooms, or sleeping rooms, separated by other use areas, such as kitchens or living rooms, but not bathrooms, shall require a separate smoke detector.
(b) In basements or cellars, smoke detectors shall be located within twenty-four inches (24") of the base of stairways with solid risers and treads and side enclosed from the top of the stairway to the basement floor in addition to any other detector requirements for that level.
(c) In basements or cellars with an open stairway, smoke detectors shall be located at the top of the stairway in addition to any other detector requirements for that level.
(d) All detectors shall be mounted on the ceiling.
History
(P.L. 1976, ch. 238, § 1; P.L. 1991, ch. 67, § 57; P.L. 1992, ch. 91, § 1.)

23-28.34-4. Power supply and wiring methods.

Statute text

(a) For all detection systems, a one-hundred and twenty (120) AC primary source of electric power with battery back-up shall be taken from a dependable light and power supply source. The wiring to each detector shall be taken from a branch lighting circuit serving a habitable area. The power source for the detectors shall be on the supply side ahead of any switches and not on circuits protected by a ground fault circuit interrupter.
(b) All required detectors shall be provided with a visible intermittent or steady "power on" indicator and shall be inter-connected so that when one detector is actuated all detectors will sound and emit an audible signal having a minimum rating of eighty-five (85) dBA at ten (10) ft.
(c) All smoke detector systems shall be tested in accordance with the manufacturer's recommendation.
(d) Combination smoke/heat or fire/burglar systems meeting the requirements of § 23-28.34-3 and chapters 4 and 5 of N.F.P.A. standard 74, 1989 edition may be used.
(e) The appendices of N.F.P.A. 74, 1989 edition may be used for informational purposes only.
History
(P.L. 1976, ch. 238, § 1; P.L. 1991, ch. 67, § 58; P.L. 1992, ch. 91, § 1.)

23-28.34-5. Enforcement.

Statute text
The local fire authorities certified by the state fire marshal as prescribed by § 23-28.2-6 in cooperation with the building code officials shall enforce the provisions of this chapter.
History
(P.L. 1976, ch. 238, § 1; P.L. 1992, ch. 91, § 1.)

23-28.34-6. Homeowners responsible.

Statute text
It shall be the responsibility of the homeowner to maintain in operable condition smoke detection systems, installed as required pursuant to this chapter.
History
(P.L. 1976, ch. 238, § 1.)

23-28.34-7. Penalty.

Statute text
Any owner of a building or structure who fails to comply with the provisions of this chapter shall be punished by a fine of not more than five hundred dollars ($500).
History
(P.L. 1976, ch. 238, § 1.)