b. Battery Power: Transmitter standby battery capacity shall provide
sufficient power to operate the transmitter in a normal standby status
for a minimum of 72 hours and be capable of transmitting alarms during
that period.
2.8.1.2
Radio Alarm Transmitter Housing
Transmitter housing shall be NEMA Type 1. The housing shall contain a lock
that is keyed [identical to the fire alarm system for the building.]
[identical to radio alarm transmitter housings on the base.] Radio alarm
transmitter housing shall be factory painted with a suitable priming coat
and not less than two coats of a hard, durable weatherproof enamel.
2.8.1.3
The Contractor shall provide [omnidirectional, coaxial, halfwave dipole
antennas] [_____] for radio alarm transmitters with a driving point
shall be corrosion resistant and designed to withstand wind velocities of
161 km/h 100 mph. Antennas shall not be mounted to any portion of the
building roofing system.
2.8.2
Master Fire Alarm Boxes
Master fire alarm boxes shall be of the coded, [shunt] [positive]
noninterfering type with succession features having a [shunt] [local
energy] type auxiliary tripping device, and of the prewound, open-door,
pull-lever type. Mechanism shall be housed in a weatherproof cottage shell
type of housing with metallic or rigid plastic code number plate mounted on
the exterior face of the cottage shell. Operation of the actuating pull
lever shall cause the box to transmit four complete rounds of code to
gongs, recorders, and other devices on the same circuit. Driving springs
shall have the capability to transmit not less than eight complete
four-round groups of code before being rewound. Boxes shall be designed
for operation of 100 milliamperes dc, but with capability of full operation
of 70 milliamperes and up to 120 milliamperes. Activation of box when a
single open fault is present on exterior fire alarm circuit shall have box
to idle for one complete round only, then immediately transmit four
complete code rounds via the box earth ground connection. Each box shall
be equipped with manual signaling key, telephone jack, silent test device,
and box shunt device. Box shall be [[wall-] [pole-] [pedestal-] mounted]
[as indicated] with center of box 1525 mm 61 inches above grade, and
provided with lighting fixture. Mounting bolts, brackets, fastenings, and
conduit shall be copper alloy, cadmium, or zinc-coated steel. Code wheel
shall be metallic and box code shall be as directed. Electrically powered
master fire alarm boxes shall have standby sealed, lead calcium battery
capacity for a minimum of 72 hours and be capable of transmitting alarms
during that period.
2.8.3
Telephonic Reporting System
Transmitters shall be compatible with existing receiving equipment at the
Supervising Station and shall comply with applicable requirements of UL 632.
Transmitter shall respond to the actuation of the fire alarm control panel
and shall be of the electric motor-driven or prewound spring mechanism
type; it shall transmit not less than four rounds of code. When
motor-driven transmitters are provided, the motor shall be connected to a
supervised circuit in a control panel. Metallic or rigid plastic code
SECTION 13851A
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