Fire alarm system installation involves running cables through ceiling voids and risers, mounting detectors and call points, connecting to control panels, and commissioning the complete system. The work requires coordination with other trades, working at height from access equipment, and handling electrical connections. During installation, the building's fire detection capability may be temporarily reduced, requiring interim fire safety measures. Only competent fire alarm engineers should carry out installation and commissioning work.
Key Hazards
Reduced fire detection capability during installation creating unprotected periods
Electric shock from contact with mains-powered fire alarm circuits
Falls from access equipment during overhead detector and cable installation
System faults from poor installation causing false alarms or failure to detect fire
Control Measures
Implement interim fire safety measures including fire watches during periods of reduced detection.
Isolate fire alarm circuits at the control panel before working on any zone or device.
Use suitable access equipment for overhead cable routing and detector installation.
Install all devices and cables in accordance with BS 5839-1 and the approved fire alarm design.
Test every device individually during commissioning and record the results formally.
Coordinate with other trades to prevent damage to installed cables and devices by subsequent work.
Label all fire alarm cables clearly and segregate them from other electrical services in shared routes.
Commission the system zone by zone and ensure the control panel is correctly programmed.
Hand over the completed installation with full documentation, as-built drawings, and test certificates.
Remember
Reduced fire detection during installation is a significant risk requiring interim fire watch measures.
Fire alarm circuits must be isolated at the control panel before any installation or maintenance work.
BS 5839-1 is the design and installation standard for fire detection systems in the UK.
Every detector, call point, and sounder must be individually tested and recorded during commissioning.
Cable damage by other trades is common and must be inspected for before the system is handed over.
Full documentation including as-built drawings and test certificates is required for building handover.
Applicable Legislation: Regulatory Reform (Fire Safety) Order 2005 · BS 5839-1 (Fire Detection and Alarm Systems) · Electricity at Work Regulations 1989 · CDM Regulations 2015