NE Fire Alarm flashcards
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32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- AHJ
- Authority Having Jurisdiction - the organization, office, or individual responsible for approving equipment, installations, and procedures under NFPA 72.
- Initiating device
- A system component that originates transmission of a change-of-state signal, such as a manual pull station, smoke detector, or heat detector.
- Notification appliance
- A fire alarm system component such as a bell, horn, speaker, or visual indicator that provides audible or visible signaling to occupants.
- Record of completion
- NFPA 72 Form 1 documenting the installed system, device counts, battery calculations, and signatures of the installing contractor and AHJ.
- Class A circuit
- An initiating device or notification circuit that continues to operate during a single open or ground fault because it provides a redundant return path.
- Class B circuit
- A circuit that does not continue to operate during a single open fault; the fault produces a trouble signal but the circuit may be disabled.
- FPLP cable
- Plenum-rated fire alarm cable listed for installation in plenums and air-handling spaces, meeting low smoke and flame spread requirements.
- FPLR cable
- Riser-rated fire alarm cable listed for installation in vertical shafts and risers where flame propagation resistance is required.
- Secondary power
- Battery or other backup supply that provides 24 hours of standby followed by 5 minutes of alarm operation (15 minutes for voice systems).
- Battery calculation
- Sum of standby current times 24 hours plus alarm current times alarm duration, with a 20 percent aging factor added.
- Supervisory signal
- A signal indicating a condition that could impair the system's ability to operate, such as a closed valve or low air pressure, annunciated within 200 seconds.
- Trouble signal
- A distinctive audible and visual indication of a fault in the system, such as an open circuit, ground fault, or loss of primary power.
- Smoke detector spacing
- Maximum 30 feet (9.1 meters) between spot-type smoke detectors on smooth ceilings, with 15 feet (4.6 meters) to walls.
- Pull station height
- Manual fire alarm boxes must be mounted 42 to 48 inches (1.07 to 1.22 meters) above finished floor and within 5 feet of exit doors.
- Duct smoke detector
- A detector listed for installation in air ducts, required where air-handling units exceed 2,000 cubic feet per minute.
- Audibility requirement
- Public mode alarms must be at least 15 dBA above ambient, or 5 dBA above ambient if ambient exceeds 105 dBA, measured 5 feet from the device.
- Sleeping area alarm
- At least 75 dBA at the pillow or 15 dBA above ambient, whichever is greater, with a 520 Hz low-frequency signal required in certain occupancies.
- Visible signal intensity
- Public mode visible appliances must provide at least 0.0375 lumens per square foot (0.4 lux) on the wall plane at 80 inches above floor.
- Synchronization
- Requirement that audible and visible appliances in the same viewing area flash in sync to prevent confusion and reduce photosensitive seizure risk.
- Pathway survivability Level 2
- Circuit protection using a 2-hour fire-rated enclosure or 2-hour rated cable, required in high-rise and certain health care occupancies.
- Pathway survivability Level 3
- Circuit protection using a 2-hour fire-rated enclosure plus 2-hour rated cable or equivalent, the highest survivability level in NFPA 72.
- Dedicated branch circuit
- A fire alarm power circuit that supplies only the fire alarm system, is labeled, and is protected from accidental disconnection by supervision.
- Annual smoke detector test
- Smoke detectors must be tested annually using listed test methods, and sensitivity must be checked at installation and at one-year intervals.
- Record retention
- Inspection and testing records must be retained for at least one year, or longer if required by the AHJ, and made available on request.
- Nebraska fire alarm contractor
- A state-licensed entity under the Nebraska Fire Sprinkler and Fire Alarm Contractor Licensing Act authorized to install, alter, or inspect fire alarm systems.
- Nebraska certificate holder
- An individual holding a State Fire Marshal certificate as a fire alarm installer or inspector/tester, required to supervise fire alarm work.
- Continuing education
- Required hours of approved training that must be completed each renewal cycle to maintain Nebraska fire alarm licenses and certificates.
- Shop drawings
- Design documents showing device locations, riser diagram, calculations, and sequence of operations, submitted to the AHJ before installation begins.
- Sequence of operations
- A written description of how the system responds to each initiating device, including alarm, supervisory, and trouble conditions, approved by the AHJ.
- Voltage drop calculation
- A calculation confirming that notification appliances receive at least their listed minimum voltage at the end of the circuit under alarm conditions.
- NEC Article 760
- The National Electrical Code article governing fire alarm system wiring, including Class 1, 2, and 3 circuits and listed cable requirements.
- Impairment procedure
- Steps taken when a fire alarm system is out of service: notify the AHJ and owner, implement a fire watch if required, and document the impairment.