1 2 5 3 0 / 1 2 5 4 0 O W N E R ' S M A N U A L
P/N 447203 Issue I
XII-2
Initiating Device Circuit (IDC)
. A circuit to which initiating devices are connected.
Labeled
. Equipment or materials to which have been attached a label, symbol, or other identifying mark
of an organization acceptable to the authority having jurisdiction and concerned with product evaluation,
that maintains periodic inspection of the production of such labeled equipment or materials. And by
whose labeling the manufacturer indicates compliance with appropriate standards or performance in a
specified manner.
Listed
. Equipment or materials included in a list published by an organization acceptable to the authority
having jurisdiction and concerned with product evaluation, that maintains periodic inspection of production
of listed equipment or materials. And whose listing states either that the equipment or material meets
appropriate standards or has been tested and found suitable for use in a specified manner.
NEC
. National Electrical Code also published as NFPA standard 70.
Notification Appliance
. An electrically operated appliance used to indicate the system status such as a
bell, horn, strobe light or speaker.
Notification Appliance Circuit (NAC)
. A circuit to which notification appliances are connected.
Power Supply
. That portion of the fire alarm control unit, which provides the power needed to operate all
control unit modules, as well as that, needed to operate all electrically powered initiating devices and all
notification appliances.
Quick Test
. A term pertaining to the test mode of the system, that automatically resets after a service
technician tests initiating devices.
Supervisory Alarm
. A signal indicating the operation of a supervisory device.
Supervisory Device
. A device that monitors the condition of a sprinkler system such as a gate-valve
switch, water-level switch, low pressure switch, low temperature switch or fire pump monitor.
Trouble Signal
. An audible signal indicating trouble of any nature, such as a circuit break or ground,
occurring in the device or wiring associated with a fire alarm signal.
Waterflow Switch
. An assembly approved for service and so constructed and installed that any flow of
water from a sprinkler system equal to or greater than that from a single automatic sprinkler head will
result in activation of this switch and subsequent indication of an alarm condition.
Zone
. A designated area of a building. Commonly, zone, is interchanged with initiating device circuit.
