processing, memory, input and output terminals, [video display
units (VDUs),] [and] [printers].
f.
Terminal Cabinet: A steel cabinet with locking, hinge-mounted
door in which terminal strips are securely mounted.
2.2.2
System Operation
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NOTE: The supply and return portions of the Style 6
loop shall not be located in the same room or shaft
to ensure system reliability. They shall be
separated by a sufficient distance so that a single
fire will not involve both the supply and return
portions of the loop.
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The system shall be a complete, supervised, noncoded, analog/addressable
fire alarm system conforming to NFPA 72. The system shall have an
interconnected riser loop or network having Style [6] [_____] supervision
that shall not be located in the same room or shaft. The return portion of
the loop shall be remote from the supply portion of the loop. [Where the
building has two stairs for egress from floors above grade, a single
impairment cannot adversely affect more than one floor. Where three or
more stairs are provided for egress from floors above grade, a single
impairment cannot adversely affect more than 1/2 of any floor.] [Any
single impairment of the system shall not affect the system on more than
[one] [one-half] of any floor.] The system shall operate in the alarm mode
upon actuation of any alarm initiating device. The system shall remain in
the alarm mode until initiating device(s) are reset and the fire alarm
control panel is manually reset and restored to normal. The system shall
provide the following functions and operating features:
a.
The FACP and fire alarm control units, if used, shall provide
power, annunciation, supervision, and control for the system.
b.
Provide Style [B] [_____] initiating device circuits [for
conductor lengths of3050 mm 10 feet or less].
c.
Provide Style [4] [_____] signaling line circuits for each floor.
d.
Provide Style [6] [_____] signaling line circuits for the network.
e.
Provide Style [Z] [_____] notification appliance circuits. The
visual alarm notification appliances shall have the flash rates
synchronized.
f.
Provide electrical supervision of the primary power (AC) supply,
presence of the battery, battery voltage, and placement of system
modules within the control panel.
g.
Provide an audible and visual trouble signal to activate upon a
single break or open condition, or ground fault. The trouble
signal shall also operate upon loss of primary power (AC) supply,
absence of a battery supply, low battery voltage, or removal of
alarm or supervisory panel modules. Provide a trouble alarm
silence feature which shall silence the audible trouble signal,
without affecting the visual indicator. After the system returns
to normal operating conditions, the trouble signal shall again
SECTION 13855N
Page 14
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