Appendix A-2
Heat Detector: A device that detects abnormally high temperature or
rate of temperature rise.
Initiating Device: A system component that originates transmission of
a change of state condition, such as a smoke detector, manual fire alarm
box, supervisory switch, etc.
Initiating Device Circuit (IDC): A circuit to which automatic or
manual initiating devices are connected where the signal received does
not identify the individual device operated.
Intrinsically Safe: Equipment designed to limit the amount of
electrical energy so that any spark or thermal effect is incapable of
causing ignition of a mixture of flammable or combustible material in
air under prescribed test conditions. Simplex Intrinsically Safe
equipment is Factory Mutual Approved for all Hazardous (Classified)
Locations in accordance with Article 500 of the National Electrical
Code, NFPA 70.
Labeled: Equipment or materials to which has 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 production 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.
Local Fire Alarm System (formerly NFPA 72 A): A Fire Alarm
system where occupants are alerted of a fire condition via local
Notification Appliances.
March Time Code: A notification code that consists of a 50% duty
cycle pulse train. The march time rate is specified in Beats Per Minute
(BPM). A Slow March Time code consists of 20 ON/OFF cycles in
one minute. A March Time code consists of 120 ON/OFF cycles in one
minute.
Municipal Master Box: An initiating device intended to send an alarm
condition to the public fire service communications center.
Normal State (IDC): The normal state is defined as the end-of-line
resistor in place with the full range of line resistance and detector load.
Notification Appliance: A fire alarm system component such as a bell,
horn, strobe, etc., that provides an audible or visible output, or both.
Notification Appliance Circuit (NAC): A circuit or path directly
connected to one or more notification appliances.
Continued on next page
Glossary of Terms, Continued
Technical Manuals Online! - http://www.tech-man.com
To Next Page
Loading...
