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(a) Annunciators used in connection with presignal type interior fire alarm systems shall be of an approved closed circuit type.
(b) Annunciators shall have relays of approved type and shall be equipped with suitable target, shutter or other indicating device, each marked with a suitable description of the purpose it serves and requiring manual reset after operation.
(c) Annunciators shall be so designed that they will indicate trouble on any circuit, control board or at any other point on an interior fire alarm system, by visible and audible signals. The indicating devices on trouble annunciators shall reset automatically when the cause of trouble has been removed.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) The following sources of energy for electrically operated interior fire alarm systems shall be approved:
(1) Central station electric power;
(2) Two (2) or more electric power generating units;
(3) Two (2) or more sets of storage battery units;
(4) One (1) electric generator supplemented by storage battery equipment or other approved auxiliary equipment;
(5) Storage battery equipment under continuous charge from an approved trickle type charger.
(b) One (1) approved source of energy shall be connected to an electrically operated interior fire alarm system at all times. When an auxiliary source of energy is required, it shall be so arranged and controlled by an automatic switch that, when the primary source of energy fails, the secondary source will be automatically connected to the fire alarm signal system. No intermediate devices shall be connected between the fire alarm control board and the source of current supply unless specifically approved by the Board of Building Standards and Building Appeals.
(c) Except as provided in subsection (e) hereof, when the energy for a fire alarm signal system is supplied by a central station electric power system, it shall be accepted as the sole source of supply. Connections to the service shall be made as close to the service entrance as practicable, but in any case on the street side of any main overcurrent protection device or service switch.
(d) Fire alarm cut-outs installed at power sources shall be enclosed in locked or sealed metal cabinets painted bright red and stenciled “INTERIOR FIRE ALARM.” Fuses shall be of the enclosed cartridge type, three (3) pole with neutral fuse replaced by a solid copper wire or other approved fuses. Screw plug fuses shall not be used.
(e) In buildings or parts of buildings of Institutional H Occupancy or Assembly Occupancy classification required under Chapter 3135 to have an auxiliary power source for emergency lighting or exitways, such source shall be utilized as an auxiliary source of energy for the interior fire alarm systems.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) Provisions shall be made so that a small current flow to constantly supervise each circuit shall be maintained on every closed circuit electrically operated interior fire alarm system. A milliammeter or other approved current indicator shall be provided and so connected as to indicate the supervising current.
(b) The supervising circuit shall be provided with a trouble bell operating on open circuit arranged to ring continuously in case of failure of the system. The trouble bell shall be so located that will be within audible range of some responsible person in the building and shall be connected to the electric light or power service in the building.
(c) Trouble bells shall not be fitted with silencing switches except in such a manner that the act of silencing the bell by the operation of a switch automatically and positively transfers the trouble signal to a red lamp, fed by some auxiliary source of current supply, on the control board. This auxiliary source of current supply may be a house lighting circuit or any other approved source.
(d) Trouble bells shall be an approved vibrating type and shall give a distinctive signal.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
Interior fire alarm systems shall be provided with an auxiliary device to test the signaling devices, and provision shall be made for silent testing of coded alarm box mechanisms without operating the signaling devices. All provisions for station testing shall be of an approved type.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
Where a building is subdivided into sections by fire walls, each section shall be deemed a separate building when designing or installing required interior fire alarm signal systems. One (1) control board may be used if so arranged as to operate the signaling devices in each section of the building separately.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) Upon completion of an interior fire alarm system and as a condition of approval, a test of the entire installation shall be made under the direction of the Fire Chief and with the cooperation of the Commissioner of Building.
(b) Electrical equipment and installations shall be subject to inspection and approval under Chapter 3161. All electrically operated closed circuit systems shall show an insulation resistance of not less than ten (10) megohms with signaling apparatus disconnected.
(c) The owner or installer of such interior fire alarm system shall furnish all the necessary tools, instructions and labor to conduct the test.
(d) Every installer shall notify the Division of Fire and the Commissioner in writing at the start and upon the completion of the installation of each interior fire alarm system.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
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