NFPA 72 2010 Prep for TFM12 Fire Alarm Technical Chapter 3 Definitions Questions and Answers 100% Verified 2023

NFPA 72 2010 Prep for TFM12 Fire Alarm Technical Chapter 3 Definitions Questions and Answers 100% Verified 2023 Approved Acceptable to the authority having jurisdiction. Authority Having Jurisdiction (AHJ) An organization office, or individual responsible for enforcing the requirements of code or standard, or for approving equipment, materials, and installation, or procedure. Code A standard that is an extensive compilation of provisions covering broad subject matter or that is suitable for adoption into law independently of other codes and standards Labeled Equipment or materials to which has been attached a label, symbol, or other identifying mark of an organization that is acceptable to the authority having jurisdiction and concerned with product evaluation, that maintains periodic inspection of production of labeled equipment or materials, and by whose labeling the manufacturing indicates compliance with appropriate standards or perfomance in a specified manner. Listed Equipment,materials, or services included in a list published by an organizationthat is acceptable to the authority having jurisdiction and concerned with evaluation of products or services, that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services, and whose listing states that either the equipment, material, or service meets appropriate designated standards or has been tested and found suitable for a specified purpose. Shall Indicates a mandatory requirement. Should Indicates a recommendation or that which is advised but no required. Acknowledge To confirm that a message or signal has been received, such as by the pressing of a button or the selection of a software command. (SIG-SSS) Acoustically Distinguishable Space (ADS) An emergency communications system notification zone, or subdivision thereof, that might be an enclosed or otherwise physically defined space, or that might be distinguished from other spaces because of different acoustical, environmental, or use characteristics, such as reverberation time and ambient sound pressure level. (SIG-NAS) Active Multiplex System A multiplexing system in which signalling devices such as transponders are employed to transmit status signals of each initiating device or initiating device circuit within a prescribed time interval so that the lack of receipt of such a signal can be interpreted as a trouble signal. (SIG-SSS) Addressable Device A fire alarm system component with a discrete identification that can have its status individually identified or that is used to individually control other functions. (SIG-IDS) Adverse Condition Any condition occuring in a communications or transmission channel that interferes with the proper transmissions or interpretation, or both, of status change signals at the supervising sation. (See also 3.3.240.7, Trouble Signal.)(SIG-SSS) Alarm A warning of danger. (SIG-FUN) Nuisance Alarm Any alarm caused by mechanical failure,malfunction, improper installation, or lack of proper maitenence, or any alarm activated by a cause that cannot be determined. (SIG-FUN) Auxiliary Box An alarm box that can only be operated from one or more remote initiating devices or an auxiliary alarm system used to send an alarm to the communications center. (SIG-PRS) Combination Fire Alarm and Guard's Tour Box A manually operated box for seperately transmitting a fire alarm singal and a distinctive guard patrol supervisory signal. (SIG-IDS) Manual Fire Alarm Box A manually operated device used to initiate a fire alarm signal. (SIG-IDS) Master Box A publically accessible alarm box that can also be operated by one or more remote initiating devices or an auxiliary system used to send an alarm to the communications center. (SIG-PRS) Publicly Accessible Alarm Box An enclosure, acessibly to the public, housing a manually operated transmitter used to send an alarm to the communications center. (SIG-PRS) Alarm Service The service required following the receipt of an alarm signal. (SIG-SSS) Alarm Verification Feature A feature of automatic fire detection and alarm system to reduce unwanted alarms wherein smoke detectors report alarm conditions for a minimum period of time, or confirm alarm conditions within a given time period after being reset, in order to be accepted as a valid alarm initiation signal. (SIG-PRO) Alert Tone An attention-getting signal to alert occupants of the pending transmission of a voice message. (SIG-PRO) Ancillary Functions Ancillary functions are those non-emergency activations of the fire alarm or mass notification audible, visual, and textual output circuits allowed. Ancillary functions can include general paging, background music, or other non-emergency signals. (SIG-ECS) Annunciator A unit containing one or more indicator lamps, alphanumeric displays, or other equivalent means in which each indication provides status information about a circuit, condition, or location. (SIG-FUN) Apartment Building A building or portion thereof containing three or more dwelling units with independent cooking and bathroom facilities. (SIG-HOU) [5000,2009] Average Ambient Sound Level The Root mean square, A-weighted, sound pressure level measured over the period of time that any person is present, or a 24-hour period, which ever time period is the lesser. (SIG-NAS) Building Fire Safety Plan Documentation that provides information on the use of alarms, transmission of alarms, response to alarms, evacuation of immediate area, evacuation of smoke compartment, preparation of floors and building for evacuation and extinguishment of fire. (SIG-ECS) Carrier High-frequency energy that can be modulated by voice or signalling impulses. (SIG-SSS) Carrier System A means of conveying a number of channels over a single path by modulating each channel on a different carrier frequency and demodulating at the receiving point to restore the signals to their original form. (SIG-SSS) Ceiling The upper surface of a space, regardless of height. Areas with a suspended ceiling have two ceilings, one visible from the floor and one above the suspended ceiling. (SIG-IDS) Level Cieilings Ceilings that are level or have a slope of less than or equal to 1 in 8. (SIG-IDS) Sloping Ceiling A ceiling that has a slope of more than 1 in 8. (SIG-IDS) Sloping Peaked-Type Ceiling A ceiling in which the ceiling slopes in two directions from the highest point. Curved or domed ceilings can be considered peaked with the slope figured as the slope of the chord from highest to lowest point. (SIG-IDS) Sloping Shed-Type Ceiling A ceiling in which the high point is at one side with the slope extending toward the opposite side. (SIG-IDS) Ceiling Height The height from the continuous floor of a room to the continuous ceiling of a room or space (SIG-IDS) Beam Construction Ceilings that have solid structural or solid nonstructural members projecting down from the ceiling surface more than 4 in. (100 mm) and spaced more than 36 in (910 mm), center to center. (SIG-IDS) Girder A support for beams or joists that runs at right angles to the beams or joists. If the top of the girder is within 4 in. (100 mm) of the ceiling, the girder is a factor in determining the number of detectors and is to be considered a beam. If the top of the girder is more than 4 in. (100 mm) from the ceiling the girder is not a factor in detector location. (SIG-IDS) Smooth Ceiling A ceiling surface uninterupted by continuous projections, such as solid joists, beams, or ducts, extending more than 4 in. (100 mm) below the ceiling surface. (SIG-IDS) Solid Joist Construction Ceilings that have solid structural or solid nonstructural members projecting down from the ceiling surface for a distance of more than 4 in. (100 mm) and spaced at intervals of 36 in (910 mm) or less, center to center. (SIG-IDS) Channel A path for voice or signal transmission that uses modulation of light or alternating current within a frequency band. (SIG-SSS) Communications Channel A circuit or path connecting a subsidiary station(s) to a supervising station(s) over which signals are carried. (SIG-SSS) Derived Channel A signaling line circuit that uses the local leg of the public switched network as an active multiplex channel while simultaneously allowing that leg's use for normal telephone communications. (SIG-SSS) Radio Channel A band of frequencies of a width sufficient to allow its use for radio communications. (SIG-SSS) Transmission Chanel A circuit or path connecting transmitters to supervising stations or subsidiary stations on which signals are carried. (SIG-SSS) Circuit Either a means of providing power or a connection path between locations Coded An audible or visible signal that conveys several discrete bits or units of information. (SIG-NAS) Communications Center A building or portion of a building that is specifically configured for the primary purpose of providing emergency communications services or public safety answering point (PSAP) services to one or more public safety agencies under the authority or authorities having jurisdiction. [1221, 2010] (SIG-PRS) Communications Circuit Any signaling path of an emergency communications system that carries voice, audio, data or other signals. (SIG-ECS) Condition A situation, environmental state, or equipment state of a fire alarm or signaling system. (SIG-FUN) [ROP-29] Abnormal (Off-normal) Condition. A condition that warrants some type of signal, notification, communication, response, action, or service. (SIG-FUN) [ROP-29] Alarm Condition An abnormal condition that poses an immediate threat to life, property, or mission. (SIG-FUN) [ROP-29] Pre-Alarm Condition An abnormal condition that poses a potential threat to life, property, or mission, and time is available for investigation. (SIG-FUN) [ROP-29] Supervisory Condition An abnormal condition in connection with the supervision of guard tours, fire suppression systems or equipment, or the maintenance features of related systems.(SIG-FUN) [ROP-29] Trouble Condition An abnormal condition due to a fault in a portion of a system monitored for integrity. (SIG-FUN) [ROP-29] Normal Condition Circuits, systems, and components are functioning as designed and no abnormal condition exists. [ROP-29] Control Unit A system component that monitors inputs and controls outputs through various types of circuits. (SIG-PRO) Autonomous Control Unit (ACU) The primary control unit for an in-building mass notification system. (SIG-ECS) Emergency Communications Control Unit (ECCU) A system capable of sending mass notification messages to individual buildings, zones of buildings, individual outdoor speaker arrays, zones of outdoor speaker arrays or; a building, multiple buildings, outside areas, or a combination of these. (SIG-ECS) Wireless Control Unit A component that transmits/receives and processes wireless signals. (SIG-PRO) Day-Care Home A building or portion of a building in which more than 3 but not more than 12 clients receive care, maintenance, and supervision, by other than their relative(s) or legal guardian(s), for less than 24 hours per day. [101,2009] (SIG-HOU)