CA Fire Alarm key terms

The specific published version of a model fire code formally enacted by the authority having jurisdiction, which fixes the technical requirements enforceable on a given project.

The organization, office, or individual empowered to approve equipment, installations, and procedures and to enforce the fire code within a jurisdiction.

An alternative design or method approved by the authority having jurisdiction as providing a level of safety at least equal to the prescriptive code requirement.

A fire protection approach in which stated safety goals and design scenarios are met through engineering analysis rather than strict adherence to prescribed prescriptive rules.

A device that senses visible or invisible combustion particles and sends a signal to the fire alarm control unit; it detects smoke but does not itself sound an alarm.

A detector whose sensing element responds to conditions at a single compact location, as opposed to sampling conditions along a line or across an area.

The maximum permitted distance between detectors, or between a detector and a wall, established by code for a given ceiling height and detector listing.

The floor area that a single detector is credited with protecting, derived from its listed spacing and adjusted for ceiling configuration and airflow conditions.

A heat detector that responds when surrounding temperature increases faster than a set rate, allowing it to react to a fast-growing fire before a fixed threshold is reached.

A heat detector that operates when its sensing element reaches a predetermined temperature, regardless of how quickly that temperature was attained.

A very-early-warning detection system that continuously draws air from protected areas through a pipe network to a sensitive particle sensor for analysis.

An audible, visible, or tactile device that alerts occupants of a fire condition, such as a horn, speaker, strobe, chime, or bell connected to the alarm system.

A device that produces sound to warn occupants, required to meet minimum sound pressure levels above ambient noise in the protected space.

A strobe or similar light source that signals alarm to occupants who cannot hear audible devices or who are in high-noise environments.

The measured luminous intensity of a visible notification appliance, used to select strobe output adequate for the size and use of the protected room.

The property of an alarm signal being loud enough to be heard over ambient noise, typically expressed as sound pressure level above the background in decibels.

An emergency communication arrangement that delivers prerecorded or live spoken instructions through speakers to guide occupants during evacuation or relocation.

The central panel that receives signals from initiating devices, processes them according to programmed logic, and activates notification and control outputs.

A system architecture in which each initiating and output device has a unique identifier, letting the panel report the specific device that has activated.

A system architecture in which devices share a circuit, so the panel reports only the zone or circuit in alarm rather than the individual device.

An arrangement that groups protected areas into labeled zones so responders can locate the general area of alarm origin from the panel display.

A remote display panel that repeats alarm, trouble, and supervisory status information from the fire alarm control unit at a location convenient for staff or responders.

The normal commercial electrical source that operates the fire alarm system, typically a dedicated branch circuit that must not be switched or ground-fault protected in a way that disables it.

The standby source, usually rechargeable batteries or an engine generator, that keeps the fire alarm system operating when normal power fails.

The method of sizing standby batteries by summing quiescent and alarm current draws over required time periods, then applying a derating factor for aging.

The wiring path connecting detectors, manual stations, and other initiating devices to the control unit so their alarm signals can be received.

The communication loop or path used by addressable systems to carry data and power between the control unit and individually identified devices.

A circuit arrangement in which the outgoing and return conductors are separate, so a single open fault does not prevent devices from operating.

A circuit arrangement in which conductors run out to the devices and stop, so a single open fault disables all devices located beyond the break.

Continuous monitoring of circuit integrity so that opens, shorts, or ground faults produce a trouble signal at the control unit rather than silently disabling protection.

A distinct audible and visible indication at the control unit that a fault exists in the system, such as a wiring break, power loss, or device failure.

The documented performance test of a completed fire alarm installation, witnessed by the authority having jurisdiction, demonstrating that all functions operate as designed.

A form documenting the installed system configuration, device locations, and programming, signed by the installer and provided to the owner and authority having jurisdiction.

Project drawings revised after installation to show the actual installed locations and routing of devices, circuits, and equipment.

The recurring program of visual inspection, functional testing, and servicing that keeps a fire alarm system reliable throughout its service life.

The pre-construction examination of submitted fire alarm drawings and calculations by the authority having jurisdiction to verify code compliance before installation begins.

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

A table mapping each initiating device or zone to the outputs it activates, used to document and verify programmed system logic during review and testing.