Standby Battery Power Supply: Standby battery power supply shall
be capable of operating the entire system for 60 hours, and following this
period, shall sound all alarm devices for a period of five minutes. Battery
charger shall be capable of fully charging de-energized batteries in 48
hours. Battery capacity shall include a 15% overage factor to account for
Modules: All modules in the FACP shall be placement supervised.
When a module is removed, a trouble signal shall be indicated.
All FACPs shall have a lamp test feature.
MANUAL STATIONS: Specify screw terminals for wiring connections
for all manual station. Do not specify break-glass-front type stations or
pull-lever, break-glass-rod type stations.
Layout of New Systems: All signal initiation and notification
circuits shall be Class A supervised. The return loop (home run) for the
wires to the FACP shall be in a separate conduit and stated so in either the
specifications or on the plans. Fire alarm riser diagrams shall show return
conduits. Contract drawings shall also show either a matrix diagram or logic
diagram for operation of all system devices.
Adding to an Existing System: When adding to an existing Class B
supervised system, Class B wiring may be used. Drawings shall indicate
manufacturer, model no., voltage and wiring Class for all existing systems.
Conductors: Wiring for 24 Vdc fire alarm circuits shall be no
smaller than No. 16 AWG single solid copper conductors per National Electric
Electrical Conduit: Electrical conduit shall be rigid metal, IMT,
or EMT. Do not use aluminum conduit. In hazardous areas, use rigid metal
conduit only. The minimum size conduit shall be 3/4-inch in diameter.
1.7.5 Voltage: The wiring of 120 Vac and 24 Vdc circuits shall not be
placed in the same conduit. Separate conduits shall be used for 120 Vac and
24 Vdc circuits.
DOOR HOLD-OPEN DEVICES: 120 Vac door hold open devices shall be
provided when fire or smoke doors are expected to be propped open for
convenience or as a necessity of building operation. Regardless of the hold
open method, all hold open devices in the same building must release when any
one hold open device is released in accordance with NFPA 101 (1991 edition).
BOQs and BEQs two to five stories in height without elevators shall be
provided with 120 Vac door hold open devices on all interior stairwell doors.
When 120 Vac devices are used, the 120 Vac power wires shall be installed in
separate conduit from the 24 Vdc conduit.