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emergency voice /alarm communication system in accordance with Section <br />907.5.2.2 <br />Exceptions: <br />1. Airport traffic control towers in accordance with Section <br />907.2.22 and Section 412 of the California Building Code. <br />2. Open parking garages in accordance with Section 408.3 of the <br />California Building Code. <br />3. Buildings with an occupancy in Group A -5 in accordance with <br />Section 303.1 of the California Building Code. <br />4. Low - hazard special occupancies in accordance with Section <br />503.1.1 of the California Building Code. <br />5. <br />shall be broadcast by the emergency voice /alarm <br />communication system <br />Mf Section 907.3.1 Duct smoke detectors is hereby amended to read as <br />follows: <br />907.3.1 Duct smoke detectors. Smoke detectors installed in ducts shall <br />be listed for the air velocity, temperature and humidity present in the duct. <br />Duct smoke detectors shall be connected to the building's fire alarm <br />control unit when a fire alarm system is installed. Activation of a duct <br />smoke detector shall initiate a visible and audible supervisory signal at a <br />constantly attended location and shall perform the intended fire safety <br />function in accordance with this code and the California Mechanical Code. <br />Duct smoke detectors shall not be used as a substitute for required open <br />area detection. <br />Exception: In occupancies not required to be equipped with a fire alarm <br />system, actuation of a smoke detector shall activate a visible and an <br />audible signal in an approved location. Smoke detector trouble conditions <br />shall activate a visible or audible signal in an approved location and shall <br />be identified as air duct detector trouble. <br />(gZ Section 907.5.2.2 Emergency voice /alarm communication system is <br />revised to read as follows. <br />907.5.2.2 Emergency voice /alarm communication system. Emergency <br />voice /alarm communication system required by this code shall be <br />Ordinance No. NS -XXXX <br />75A-26 Page 12 of 84 <br />