NICET FAS-III key terms

The organization, office, or individual responsible for approving equipment, installations, and procedures and for interpreting and enforcing the applicable fire and building codes.

The National Fire Alarm and Signaling Code, which establishes minimum requirements for the design, installation, testing, inspection, maintenance, and performance of fire alarm and signaling systems.

Equipment or materials included in a published list by an organization acceptable to the authority having jurisdiction, indicating the product meets designated standards and is subject to follow-up inspection.

A product safety standard for fire alarm control units and accessories; equipment used in protected-premises fire alarm systems generally must be listed to this standard.

A category assigned to a building or space based on its use and hazard level, which determines the fire protection, detection, and alarm features required by building and fire codes.

The portion of a fire alarm system that carries signals between components, including initiating device circuits, notification appliance circuits, and data communication links between control units and devices.

A signaling circuit or pathway that leaves the control unit, serves the devices, and returns to the control unit, so a single open fault or ground does not prevent operation of all devices.

A circuit or pathway that connects devices in a single path and does not return to the control unit; a single open fault disables devices beyond the break.

The circuit that connects automatic detectors and manual pull stations to the fire alarm control unit so their alarm, trouble, and supervisory signals can be received and processed.

The circuit that supplies operating power to audible and visible notification appliances; it must deliver sufficient voltage and current to operate every appliance under worst-case conditions.

A system in which each initiating or output device has a unique address, allowing the control unit to identify the specific device that is in alarm, trouble, or supervisory condition.

A system that groups initiating devices into zones rather than identifying each device individually, so the control unit reports the zone rather than the specific device.

A defined area or group of devices whose signals are reported together by the control unit; zones may follow floors, smoke compartments, or other functional boundaries.

A feature that delays processing of a smoke detector alarm for a set period and resets the detector to confirm the alarm, reducing false alarms from transient conditions.

A design arrangement in which two or more detectors in the same area must alarm before the system initiates an alarm, reducing false alarms from a single detector.

An alarm caused by a condition that is not a genuine fire, such as cooking smoke, dust, steam, or insects; proper detector selection, placement, and verification features help reduce these.

A detector whose sensing element is concentrated at a single point, such as a ceiling-mounted smoke or heat detector, as opposed to a beam or line-type detector.

The maximum distance between detectors and the area each detector may cover, as permitted by code, based on detector type, ceiling height, and ceiling configuration.

The layering of smoke or hot gases beneath a ceiling, which can keep smoke from reaching a detector and may require adjusted detector placement or spacing.

A signal indicating an off-normal condition in a system or protected premises that requires attention, such as a closed valve, low tank level, or fire pump condition.

A signal indicating a fault in the fire alarm system itself, such as an open circuit, ground fault, or loss of primary power, requiring prompt attention.

An arrangement that delays occupant notification for a short period after an alarm to allow trained personnel to investigate; if the alarm is not acknowledged, notification proceeds automatically.

A calculation of voltage lost along a circuit due to conductor resistance, used to confirm that notification appliances receive at least their minimum rated operating voltage.

A calculation of standby and alarm current loads and required battery capacity to verify the system can operate for the code-required time without primary power.

The backup power source, such as batteries or a generator, that keeps the fire alarm system operating when the primary power source fails, for a code-specified duration.

A resistor installed at the far end of a conventional circuit to provide supervision; its presence allows the control unit to detect open circuits, and its loss indicates a fault.

An approved material or system used to seal penetrations in fire-rated walls or floors, restoring the fire-resistance rating and helping prevent smoke and fire spread.

Cable approved for installation in air handling spaces, having limited smoke and flame spread characteristics; it is typically marked FPLP or an equivalent plenum rating.

Cable approved for use in vertical shafts between floors, typically marked FPLR, and designed to limit flame travel in riser applications.

A document required by NFPA 72 that records the installed system configuration, device locations, and installer certifications, and is part of the acceptance process.

A document that records inspection and testing results, including dates, devices tested, test methods used, and any deficiencies found and corrected.

The initial operational test of a new or modified fire alarm system, witnessed by the authority having jurisdiction or its representative, to verify code and design compliance.

A test verifying that a smoke detector's response falls within its listed sensitivity range, performed with a calibrated instrument or the manufacturer's specified method.

A condition in which a fire alarm system or part of it is out of service; it requires notification of the authority having jurisdiction, occupant notification, and documented mitigation until restored.

A written description of how the fire alarm system responds to each input, including which outputs activate, in what order, and under what conditions.

A table mapping each initiating device or input to the outputs and actions it triggers, used to document and verify system programming and design intent.

The documents, drawings, calculations, and product data submitted to the authority having jurisdiction or design professional for review and approval before installation.

A drawing updated to show the actual installed configuration of the system, including device locations, circuit routing, and changes made during construction.

A Request for Information; a formal written question from the contractor to the design professional seeking clarification of drawings or specifications during design or construction.

A written modification to the contract scope, price, or schedule, approved by the owner, usually arising from design changes or unforeseen field conditions.