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each unit within the structure and a <br /> prescribed number of heat detectors in <br /> each attic space over each unit <br /> depending on the size of the attic . <br /> There shall be fixed temperature heat <br /> detector in the room or space which <br /> houses the heating plant for each unit <br /> or structure . <br /> These heat detectors shall be part of a <br /> complete , closed alarm system, local to <br /> the entire building or structure , <br /> therefore sounding around and <br /> throughout the entire building or <br /> structure . This system will be a low ..' <br /> voltage system with a sixty-hour "v <br /> battery backup . The AC power <br /> connection shall connect ahead of the <br /> main with a separate disconnect or shut <br /> off switch with a locking device and <br /> key. The wiring for this system shall <br /> be low energy fire alarm wire rated <br /> at 106 centigrade . <br /> If the layout of a particular structure <br /> offers common hallways there shall be <br /> smoke detectors in each hallway which <br /> are wired to the tow voltage alarm <br /> system, the number and location to be <br /> determined by the Fire Chief . Each of <br /> these hallway smoke detectors shall <br /> be equipped with at least nine (9) <br /> second delay capacitor and screen . '^ <br /> Also, if common hallways exist and if <br /> the Fire Chief deems them necessary, <br /> pull stations shall be installed at ' <br /> either end of these common hallways <br /> located as recommended by the <br /> Massachusetts State Building Code . <br /> Also if deemed necessary by the Fire <br /> Chief , an announciator panel shall be <br /> installed in a common hallway with the <br /> number of zones and locations of said <br /> ,. box negotiable . <br /> Within this low voltage alarm system <br /> within each building or structure there <br /> shall be installed exterior audible <br /> bells or horns as prescribed by the N <br /> Fire Chief . In any multi -family dwelling <br /> complex where deemed necessary by the <br /> Fire Chief , there shall be an exterior <br /> rotating beacon light located as <br /> -45- <br />