(2)
Enable or disable the point/device
(3)
Control sensor's relay driver output
2.2.8
Electric Power
2.2.8.1
Primary Power
Provide primary power for the FACP from the normal AC service to the
building [where shown on the drawings] [or] [_____]. Power shall be 120
VAC service, transformed through a two-winding, isolation type transformer
and rectified to low voltage DC for operation of circuits and devices.
Make the service connection for the FACP at the [main service switchgear]
[emergency distribution panel where shown] [a main distribution panel where
shown]. Provide appropriate equipment to protect against power surges.
Provide a separate NEMA 1 "general purpose enclosure" for the circuit
breaker. The circuit breaker enclosure shall be painted red, marked "FIRE
ALARM SYSTEM," provided with a red and white engraved plastic sign
permanently affixed to the face of the switch, and provided with a lockable
handle or cover.
[2.2.8.2
Generator
Where any emergency generator provides a standby power supply for life
safety system circuits, provide a connection from one of the circuits for
the fire alarm system.
]2.2.9
Emergency Power Supply
Provide for system operation in the event of primary power source failure.
Transfer from normal to auxiliary (secondary) power or restoration from
auxiliary to normal power shall be automatic and shall not cause
transmission of a false alarm.
2.2.9.1
Batteries
Provide sealed, maintenance-free, [lead-calcium] [sealed lead acid] [gel
cell] [nickel-cadmium] [lithium] batteries as the source for emergency
power to the FACP. Batteries shall contain suspended electrolyte. The
battery system shall be maintained in a fully charged condition by means of
a solid state battery charger. Provide an automatic transfer switch to
transfer the load to the batteries in the event of the failure of primary
power.
2.2.9.2
Capacity
**************************************************************************
NOTE: Use 48 hours if the building has no generator
providing standby power to the fire alarm system.
If such a generator exists, use 4 hours.
**************************************************************************
Provide the batteries with sufficient capacity to operate the system under
supervisory and trouble conditions, including audible trouble signal
devices for [48] [_____] hours and audible and visual signal devices under
alarm conditions for an additional [10] [_____] minutes.
SECTION 13855N
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