Fire Detection and Alarm RAMS Guide for UK Contractors

Key Topics in a Fire Detection and Alarm RAMS

Fire alarm impairment management and temporary fire watch

When the fire detection and alarm system is isolated during installation or maintenance work, the building's primary means of detecting and alerting occupants to fire is degraded. This is a formal fire alarm impairment and must be managed. The RAMS must describe: written impairment notification to the Responsible Person (RP) before any isolation; the temporary fire watch arrangement — a competent person patrolling the affected zone at a frequency agreed with the RP (typically every 30 minutes) to compensate for reduced detection coverage; the maximum duration of any individual isolation; and the reinstatement procedure — testing and confirming the system is fully operational before the impairment is closed. Many clients require notification to their insurer of planned impairments longer than a specified duration. Covering detectors without notifying the RP and implementing a temporary fire watch is a common inspection failure.

Service strikes during drilling for cable routes

FD&A installation requires drilling through ceilings, walls, and floors to route detection and sounder cabling. Before any drilling, a cable and pipe detector sweep must be carried out to identify concealed electrical cables, gas pipework, water pipes, and data cabling. Results must be marked on the surface before drilling begins. The RAMS must require that drilling is stopped and reported to the site manager if any unexpected cable or pipe is encountered. In pre-2000 buildings, drilling through ceiling tiles, ceiling boards, or pipe lagging may disturb asbestos-containing materials — an asbestos survey for the work zones must be reviewed before any drilling.

Fire compartment sealing after cable penetrations

Any cable routed through a fire-compartment wall, floor, or ceiling creates a penetration that must be sealed with an approved intumescent fire-stopping product to maintain the compartment's fire resistance rating. Unsealed cable penetrations are a common cause of compartmentation failure found during fire safety audits and building control inspections. The RAMS must require that all penetrations through fire-rated elements are sealed on completion, photographed, and recorded on as-built drawings before handover. Fire stopping should be specified to meet the required fire resistance period for the element penetrated (typically 30, 60, or 120 minutes).

False alarm prevention during installation in occupied buildings

Activities including drilling, cutting, sanding, and power tool use generate dust, heat, and aerosols that can trigger smoke or heat detectors if they are live in the work zone. The RAMS must describe: which detectors in the active work zone will be isolated or covered during dust and heat-generating activities; the impairment notification for each isolation; the maximum duration of any detector cover; and the testing and reinstatement procedure at the end of each shift.