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72-j() ~ATIOSAL FIRE AI_-\RM CODE 2-3.3 Primary Power Supply - Monitored Battery. House- hold fire warning equipment shall be permiued to be pow- ered by a battery. provided that the battery is monitored to ensUl-e that the following conditions are met: (a) All power requirements are met for at least 1 year of baue~' life. including monthly testing. (b) A distinctive audible trouble signal sounds before the battery is incapable of operating (from causes such as aging or terminal corrosion) the device(s) for alarm purposes. (c) For a unit employing a lock-in alann feature. auto- matic transfer is provided from alarm to a trouble condition. (d) The unit is capable of producing an alarm signal for at least 4 minutes at the battery voltage at which a trouble sig- nal is normally obtained. followed by not less than 7 days of trouble signal operation. (e) The audible trouble signal is produced at least once e'"ery minute for 7 consecutive days. (f) Acceptable replacement batteries are clearly identified I b," the manufacturer's name and model number on the unit near the battery compartment. (g) A readily noticeable, ,'isible indication is displayed when a primary battery is removed from the unit. (h) Any unit that uses a nonrechargeable bauery as a pri- mary power supply that is capable of a 10-year or greater service life, including testing, and meets the requirements of 2-3.3(b) through (e) shall not be required to have a replace- able battery. 2.3.4 Secondary (Standby) Power Supply. 2-3.4.1 Removal or disconnection of a battery used as a seconda~' (standby) power source shall cause a distinctive audible or visible trouble signal. 2-3.4.2 Acceptable replacement batteries shall be clearly identified by manufacturer's name and model number on the unit near the battery compartment. . 2-3.4.3 Where required by law for disposal reasons. rechargeable batteries shall be removable. 2-3.4.4 Automatic Recharging. 2-3.4.4.1 Automatic recharging shall be prO\ided where a rechargeable bauery is used as the secondary (standby) supply. The supply shall be capable of operating the system for at least 24 hours in the normal condition, followed by not less than 4 minutes of alarm. Loss of the secondary (standby) source shall sound an audible trouble signal at least once every minute. 2-3.4.4.2 The battery shall be recharged within 4 hours where power is provided from a circuit that can be switched on or ofT by means other than a circuit breaker, or within 48 hours where power is prO\'ided from a circuit that cannot be switched on or ofT by means other than a circuit breaker. -2.3.4.5 Where automatic recharging is not provided. the bauery shall be monitored to ensure that the following con- ditions are met: (a) All power requirements are met for at least 1 year of batte~' life. (b) A distinctive audible trouble signal sounds before the battery capacity has been depleted below the level required to produce an alarm signal for 4 minutes. 2-3.5 Primary Power - Nonelectrical. A suitable spring- wound mechanism shall provide power for the nonelectrical 1996 Edition I portion of a listed single station alarm. A visible indication shall be provided to show that sufficient operating power is not available. 2-4 Equipment Perfonnance. 2-4.1 General. The failure of any nonreliable or short-life component that renders the detector inoperable shall be readily apparent to the occupant of the living unit without the need for test. 2-4.2 Smoke Detectors. Each smoke detector shall detect abnormal quantities of smoke that can occur in a dwelling. shall properly operate in the normal environmental condi- tions of a household. and shall be in compliance with ANSI/UL 268. Sill nda rd for Safety Smoke Detectors for Fire Pro- tective Signaling Systems, or A:-.ISI/VL 217, Slllndard for Safely Single and J1ultiple Station Smoke Detectors. 2-4.3* Heat Detectors. 2-4.3.1 Each heat detector. including a heat detector inte- grally mounted on a smoke detector, shall detect abnormally high temperature or rate-of-temperature rise. and all such I detectors shall be listed for not less than 50-ft (l5-m) spacing. 2-4.3.2* Fixed temperature detectors shall have a temper- ature rating at least 250F (l40C) above the normal ambient temperature and shall not be rated 500F (280C) higher than the maximum anticipated ambient temperature in the room or space where installed. 2-4.4 Alarm Signaling Intensity. 2-4.4.1 All alarm-sounding appliances shall ha"e a mini- mum rating of85 dBA at IO ft (3 m). Exception: An additional sounding applwme intended for UM in the sa11lt room as the user. such as a bedroom, 1TUly have a sound pressure let/el as low as i5 dBA at 10ft (3 m). 2-4.4.2 Visible notification appliances used in rooms where a hearing impaired person(s) sleeps shall have a minimum rating of 177 candela for a maximum room size of 14 ft x 16 ft (4.27 m x 4.88 m). For larger rooms, the visible notification appliance shall be located within 16 ft (4.88 m) of the piUow_ Visible notification appliances in olher areas shall have a mini- mum rating of 15 candela. Exception: Where a visible notification applwme in a sleePing room is mounted more than 24 in. (610 mm) below the ceiling, a minimum rating of 1 If) candeu.z shall be permitted. 2-4.5 Control Equipment. 2-4.5.1 The control equipment shall be automatically restoring upon restoration of electrical power. 2.4.5.2 The control equipment shall be of a lype that "locks in" on an alarm condition. Smoke deteclion circuits shall not be required to lock in. 2-4.5.3 If a reset switch is prO\'ided, it shall be of a self- restoring type. 2-4.5.4 An alarm-silencing switch or an audible trouble- silencing switch shall not be required to be provided. Exception: Where the switch's silenced position is indicated by a readily apparent sigTUll. ,.~- ....... ( (\ ( .......-