Fire Alarm / EWIS Installation SWMS

Fire alarm and Emergency Warning and Intercommunication System (EWIS) installation involves mounting detectors and sounders at ceiling height, pulling fire-rated cabling through risers and ceiling cavities, terminating field devices, and commissioning the Fire Indicator Panel (FIP) and EWIS amplifier rack. The work routinely combines elevated work platforms, energised low-voltage circuitry, confined ceiling spaces and integration with live building services, placing it squarely within the High Risk Construction Work definition under WHS Regulation 2025 r291. A documented Safe Work Method Statement is mandatory before any work commences because the task involves a risk of a fall greater than two metres, work on or near energised electrical installations, and work in areas with movement of powered mobile plant. The SWMS must be prepared in consultation with workers, signed on by every person performing the task, kept available at the workplace, and retained for the duration of the work plus two years where a notifiable incident occurs. Failure to prepare, comply with, or review the SWMS exposes the PCBU and officers to enforcement under the WHS Act.

Hazards identified

7 hazards covered, sorted by priority.

Control measures

Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.

1. 1Elimination — Mount FIP, amplifier rack and battery cabinet at floor level during pre-ceiling fit-out stage to eliminate working at height for panel termination.
2. 2Elimination — Pre-fabricate detector pigtails and looms at ground-level bench so terminations are not performed inside the ceiling cavity at height.
3. 3Substitution — Replace traditional A-frame ladders with self-propelled scissor lifts or low-level work platforms with guardrails for all ceiling work above 2 m.
4. 4Substitution — Specify pre-terminated fire-rated cable assemblies in lieu of field-terminating multi-core cables inside congested ceiling spaces.
5. 5Engineering — Isolate and lock out the FIP mains supply at the distribution board using a personal danger tag and padlock before any termination work commences.
6. 6Engineering — Install hard barricades, exclusion zones and overhead protection beneath active EWP work areas in accordance with AS 2550.10 operator requirements.
7. 7Administrative — Conduct asbestos register review and clearance certificate inspection before any ceiling penetration; engage licensed removalist where ACM is suspected per the asbestos CoP.
8. 8Administrative — Issue daily permit-to-work and electrical isolation certificate; notify building manager and fire monitoring company before commissioning to prevent unwanted brigade attendance.
9. 9PPE — Mandatory Class 0 electrical insulating gloves rated to 1000V, AS/NZS 1337.1 safety glasses, AS/NZS 1801 hard hat and AS/NZS 2210.3 safety footwear for all workers.
10. 10PPE — AS/NZS 1716 P2 disposable respirators, AS/NZS 1891.1 full-body harness with twin-tail energy absorbing lanyard anchored to certified anchor point above the worker.

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

On a six-storey commercial office refurbishment, a fire services technician arrives at the Level 3 fit-out zone to install 42 photoelectric detectors and pull fire-rated cable back to the new FIP in the ground floor riser. At the 7:00 am pre-start, the supervisor opens this SWMS on a tablet and walks the two-person crew through the hazard register, focusing on the fall-from-EWP and energised-FIP entries flagged HIGH. The crew confirms the scissor lift has a current pre-start log, the harness anchor points are rated, and the asbestos register clearance for the ceiling cavity has been sighted. Each worker signs the SWMS sign-on sheet and writes their licence number against the electrical isolation control. Mid-morning, the crew discovers an unexpected live 240V circuit feeding an old occupancy sensor in the ceiling cavity — a hazard not originally identified. Work stops, the supervisor reopens the SWMS, adds a handwritten amendment under the 'review and revise' section, isolates the circuit at the distribution board, applies a personal danger tag, and has all workers re-sign the amended document before resuming. At day end, the signed SWMS is uploaded to the principal contractor's compliance portal, demonstrating active consultation and revision in line with WHS Regulation 2025 r299 obligations.

Related legislation

• WHS Act 2011 (model)
• WHS Regulation 2025
• AS/NZS 3000 — Electrical installations

Frequently asked questions