Technical terms spanning standards, manufacturers, commissioning, networking, testing and fault finding.
Technical guidance only. Confirm current project requirements against the applicable standards, legislation, system documentation and site-specific fire strategy.
Showing 15 of 15 matching glossary entries.
A panel indication that the charging circuit or the batteries are outside limits — aged batteries, poor connections or a failed charger stage.
Check battery date codes and terminal voltage under load before condemning the charger.
Emergency lighting powered from a central battery installation rather than batteries in each fitting, concentrating maintenance at one point.
The European product standards for fire detection and alarm system components — panels, power supplies, detectors, call points, sounders, isolators and radio devices each have their own part.
The resistor, capacitor or active unit at the end of a monitored circuit that lets the panel supervise the wiring for open and short circuit faults.
Emergency lighting arranged to illuminate escape routes and exits so occupants can leave safely on supply failure.
Whether an electrically controlled lock releases (fail-safe) or stays locked (fail-secure) on power loss — chosen per door from escape and security requirements.
Escape routes generally demand fail-safe behaviour; confirm against the fire strategy.
The position equipment adopts on power or signal loss — open or closed varies by design strategy, so confirm the intended state before judging behaviour a fault.
A brief regular test proving each emergency luminaire operates on supply failure — proves function, not duration.
The UK domestic convention describing the equipment standard and power arrangements for dwelling alarm systems, set by the applicable domestic standard and risk.
A monitored input/output device connecting the fire system to other building systems — plant, dampers, lifts, security — under cause-and-effect control.
An emergency luminaire that lights only when the normal supply fails.
The monitored supply providing system power and battery charging; PSU faults commonly present as charger, battery or mains fault indications.
The current a system draws in normal standby, from panel and all devices together; the first input to any battery calculation.
Loop devices often dwarf the panel's own figure — never use the panel datasheet alone.
A powered damper in ductwork controlled to restrict smoke movement; the test is trigger → movement → position feedback, not just a status LED.
Sizing batteries from standby current × standby duration plus alarm current × alarm duration, with the required safety margin, rounded up to a standard battery size.