AR Fire Alarm key terms

A system component such as a smoke detector, heat detector, manual pull station, or waterflow switch that automatically or manually sends a signal to the fire alarm control unit when fire or another emergency condition occurs.

An audible or visible device such as a horn, bell, chime, or strobe that alerts building occupants when the fire alarm system is activated. It is connected to a notification appliance circuit controlled by the panel.

The wiring pathway connecting initiating devices to the fire alarm control unit. It may be conventional, where devices share an alarm state, or addressable, where each device reports individually.

The circuit that supplies power and signal to notification appliances. It is supervised by the control unit so that opens, shorts, or ground faults are annunciated as trouble conditions.

A fire alarm arrangement in which each initiating or output device has a unique address, allowing the control unit to identify the specific device that activated or failed rather than only the circuit.

A field device on an addressable system that carries its own unique identifier and communicates individually with the control unit over the signaling line circuit.

The supervised pathway that carries digital communication between the fire alarm control unit and addressable devices. It may be wired as a loop or as a stub and is monitored for faults.

A fire alarm arrangement in which devices on a circuit are not individually identified; the control unit reports only the zone or circuit in alarm, and the general area must be searched to find the activated device.

A defined area or group of devices that the fire alarm control unit reports as a single unit of alarm or trouble information. Zoning helps responders locate the general origin of a signal.

A remote display panel that shows alarm, supervisory, and trouble conditions by zone or device, typically installed at a main entrance or other location where responders can read system status.

The central panel that receives signals from initiating devices, processes them, activates notification appliances and other outputs, monitors circuits for faults, and displays system status.

Continuous electrical monitoring of a circuit or component so that a break, short, ground fault, or power loss is detected and reported as a trouble signal rather than going unnoticed.

An audible and visual indication at the control unit that a fault exists in the system, such as an open circuit, loss of primary power, or failed device, meaning the system may not perform as designed.

A signal indicating that a system or component being monitored, such as a sprinkler control valve or fire pump, has moved off its normal position or condition and needs attention but is not itself an alarm.

A device installed on a sprinkler system pipe that senses the movement of water caused by a flowing sprinkler head and sends an alarm signal to the fire alarm control unit.

A device that senses visible or invisible combustion products in the air and initiates an alarm signal. Common types include ionization, photoelectric, and air-sampling designs.

A device that responds to an abnormal rise in temperature or to a fixed high temperature and then initiates an alarm signal. It is generally slower to respond than a smoke detector.

A heat detector that activates when the temperature rises faster than a preset rate per minute, catching fast-growing fires before a fixed temperature threshold is reached.

A heat detector that activates when the surrounding temperature reaches a predetermined set point, regardless of how quickly that temperature was reached.

The maximum permitted distance between detectors and between detectors and walls, determined by the detector listing and the ceiling height and configuration, so coverage has no large gaps.

A manually operated initiating device, typically mounted along an exit path, that a person actuates to send an alarm signal to the fire alarm control unit.

A smoke detector installed in an HVAC duct that samples airflow and signals the alarm system, often also shutting down air handling to limit smoke spread through the building.

A feature that briefly delays alarm processing to confirm that a smoke detector signal persists, reducing nuisance alarms from transient conditions such as dust or steam.

An alarm caused by a condition that is not a real fire, such as cooking smoke, steam, or dust. Design, placement, and verification features are used to reduce these occurrences.

The normal source of operating power for a fire alarm system, usually the commercial building electrical service, which must be dedicated and arranged so it is not easily disconnected.

The standby source, typically rechargeable batteries or an engine-driven generator, that powers the fire alarm system when the primary supply fails, for a duration set by code.

Rechargeable batteries within the control unit that carry the system load during a primary power outage and are sized to support standby plus alarm operation for the required period.

A circuit arranged so that an open or ground fault does not prevent the remaining devices from operating; the conductors leave the control unit and return on a separate path.

A circuit arranged so that a single open fault disables all devices beyond the break. It does not return to the control unit, and the fault is annunciated as a trouble condition.

An unintended connection between a circuit conductor and earth or the enclosure. Fire alarm circuits are monitored so a ground fault is reported as a trouble condition.

The loss of voltage along a conductor caused by its resistance as current flows. Notification circuits must be calculated so appliances still receive their rated voltage at the end of the circuit.

The relationship stating that voltage equals current multiplied by resistance. It is used to compute circuit current, voltage drop, and conductor sizing in fire alarm installations.

The ability of critical fire alarm circuits to keep functioning during a fire, achieved through circuit integrity methods such as dedicated enclosures or fire-rated cable pathways.

The recurring program of visual inspection, functional testing, and servicing of fire alarm components at code-specified intervals to confirm the system remains operational and reliable.

The documented test performed after installation to demonstrate that the fire alarm system and its components operate as designed and meet the adopted code before the system is placed in service.

A document prepared at installation that records the system configuration, device locations, and test results, and that is kept available for future inspection and maintenance reference.

The state board responsible for licensing and regulating fire protection system contractors and technicians in Arkansas, including issuing licenses and enforcing the adopted rules.

The credential an individual or business must hold to design, install, service, or inspect fire protection systems in Arkansas, obtained by meeting experience and examination requirements.

The official authorization issued by a local authority before fire alarm work begins, allowing installation or alteration and triggering required inspections before the system can be approved.

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

Required ongoing training hours that Arkansas license holders must complete within each renewal cycle to maintain their fire protection credentials and stay current with codes and practices.