(a) Smoke Detector.
(1) Each smoke detector shall be capable of detecting abnormal quantities of smoke that may occur in the dwelling and shall properly operate in the normal environmental conditions of the dwelling.
(2) Smoke detectors shall be capable of detecting gray smoke having a minimum smoke obscuration of four percent (4%) per foot (optical density of 0.0177 per foot).
(b) Laboratory Approval. No smoke detector or heat detector shall be installed unless the unit bears the label of Underwiters' Laboratories, Inc. or other similar nationally recognized testing and approval laboratory which maintains a periodic follow-up review of the labeled devices to ensure compliance with the original approval.
(c) Alarm Sounding System.
(1) Each detection device shall cause the operation of an alarm which shall be clearly audible in all bedroom areas over background noise levels, with all intervening doors closed. The audibility level must be met with all usual night-operated household equipment, such as air conditioners, humidifiers, etc., in operation.
(2) All alarm sounding devices shall have a minimum rating of eighty-five dBs at ten feet.
(3) The audible signal shall be distinctive from audible signaling devices used for other purposes.
(4) The detector shall be designed for and capable of either self-restoration or manual restoration of the detector system.
(5) No detector shall provide for deactivation of the audible alarm other than by reactivation of the detector system.
(d) Control Equipment.
(1) The control equipment shall be automatically restoring on restoration of electrical power.
(2) The control equipment shall be of a type that locks in on an alarm condition. Smoke detectors circuits need not lock in.
(3) Any reset switch shall be self-restoring.
(4) No detector shall be equipped with an alarm-silencing switch or an audible-trouble-silencing switch unless its silenced position is indicated by a readily apparent signal.
(5) Smoke detectors may be tested by subjecting the unit to smoke instead of a test button or component.
(e) Detection Circuits.
(1) Wire used shall be of the solid conductor, no-stranded type.
(2) The detector's circuit shall be such that a break in the wiring shall not cause an alarm signal, but shall cause an audible trouble signal, using either a closed loop detecting circuit or normally open contact detectors with end-of-line resistor or equivalent.
(3) All wiring shall be installed in accordance with the provisions of the proper construction codes of Borough.
(Ord. 2030. Passed 12-17-79.)