Fibre Splicing in Confined Pit SWMS
Optical fibre splicing in underground telecom pits, manholes and underground chambers — pit clearance and atmospheric test, traffic control where pit is in the carriageway, fusion / mechanical splicing, fibre handling and disposal, laser-eye-safety controls, pit reinstatement.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Fibre splicing in a confined pit covers optical-fibre splicing work in underground telecommunications pits, manholes, and underground chambers — pit clearance and atmospheric testing, traffic control where the pit is in the carriageway, fusion or mechanical splicing, fibre handling and disposal, laser-eye-safety controls, and pit reinstatement. The work is High-Risk Construction Work on one ground: it is carried out in or near a confined space. Underground telecommunications pits and manholes are enclosed structures that can hold an oxygen-deficient or contaminated atmosphere from ground gas, water ingress, or decomposition, and a worker can be overcome before they recognise the hazard. A documented safe system of work is required before pit entry begins.
While the splicing task itself is fine, precise work, the surrounding context carries the serious risks — the confined pit atmosphere, the position of the pit in a trafficked carriageway, the handling of glass-fibre offcuts, and the eye-safety considerations of working with optical sources. The confined-space controls follow AS 2865 with atmospheric testing before and during entry, traffic management follows the road-authority requirements where the pit is in or near the carriageway, and laser-eye safety follows the optical-safety framework for the fibre sources in use.
This SWMS is jurisdiction-neutral within Australia and written to the model WHS framework. Victoria operates under the Occupational Health and Safety Act 2004 and OHS Regulations 2017 — check the VIC-specific variant for the local equivalents of the duties and codes cited here.
Hazards identified
11 hazards covered, sorted by priority.
Asphyxiation or toxic exposure in the enclosed pit from ground gas, water ingress, decomposition, or displaced air, which can overcome a worker quickly.
Explosion or flash fire if methane or other flammable ground gas accumulates in the pit and finds an ignition source.
Fatal or serious impact injury to a worker entering or working in a pit located in or beside a trafficked road without traffic control.
Inability to self-rescue or be rescued promptly through the restricted opening if the worker is injured or the atmosphere deteriorates.
Drowning or entrapment if the pit floods from rain, a burst service, or rising groundwater while a worker is inside.
Skin penetration and irritation from tiny glass-fibre offcuts that can enter the skin and are difficult to see and remove.
Eye injury from looking into an energised fibre or connector carrying an optical source during splicing, testing, or fault-finding.
Musculoskeletal injury from working in the cramped, awkward posture of an underground pit for the duration of the splice.
Fall and impact injury to workers or the public at an open, unguarded pit opening.
Electric shock or service damage from contact with electrical, gas, or water services routed through or near the telecommunications pit.
Sprain, fracture, or fall on the wet, muddy surfaces typical of an underground pit and at the access opening.
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Treat the pit, manhole, or chamber as a confined space to AS 2865 — atmospheric test for oxygen, flammable gas, and contaminants before and continuously during entry, work to an entry permit, and post a trained stand-by attendant at the opening.
- 2Ventilate the pit before and during entry where testing shows it is needed, and prohibit entry until the atmosphere is proven safe, re-testing if conditions change.
- 3Implement a traffic management plan to the road-authority requirements where the pit is in or near the carriageway — signage, barriers, lane control, and a safe work area separating the crew from live traffic before any pit work begins.
- 4Resource a confined-space rescue plan with trained rescuers and retrieval equipment suited to the pit opening, so an injured worker can be recovered promptly without relying on delayed external rescue.
- 5Manage water and flooding risk — check for and control water ingress, monitor weather and upstream services, and have a means to remove water and to evacuate the pit quickly if it begins to flood.
- 6Handle glass-fibre offcuts with a fibre-disposal regime — a dedicated container, adhesive collection, no eating or drinking in the work area, and skin protection — to prevent fibre penetration and ingestion.
- 7Apply laser-eye-safety controls — never look into an energised fibre or connector, verify sources are de-energised before inspection, and use the optical-safety procedures appropriate to the fibre sources in use.
- 8Guard or attend the open pit at all times to prevent falls by the crew or the public, and protect the access opening.
- 9Identify and avoid other buried services routed through or near the pit, treating any unexpected service as live until proven otherwise.
- 10Manage manual handling and the awkward pit posture with task rotation, breaks, and equipment positioned to reduce reaching, and maintain footing controls on the wet pit surfaces.
- 11Provide PPE as the final layer — atmospheric monitors, high-visibility clothing for the traffic environment, eye protection, skin protection against fibre, and footwear with grip — inspected before use.
- 12Verify confined-space entry and traffic-control competencies for the crew, and brief every worker on the SWMS, the atmospheric and traffic controls, and the rescue plan before entry.
Applicable Codes of Practice
Becomes legally binding under Section 26A of the WHS Act from 1 July 2026. Governs pit and manhole entry — atmospheric testing, entry permits, stand-by attendant, and rescue arrangements.
Confined spaces. Provides the technical basis for atmospheric testing, entry permits, stand-by attendants, and rescue arrangements for the pit and chamber entries.
Becomes legally binding under Section 26A from 1 July 2026. Supports the work-area, access, and welfare controls for underground pit work, including the management of work near traffic.
Safety of laser products. Informs the laser-eye-safety controls for working with optical sources in fibre splicing, testing, and fault-finding.
Manual of uniform traffic control devices — Traffic control for works on roads. Governs the traffic management plan and devices where the pit is in or near the carriageway.
Selection, use and maintenance of respiratory protective equipment. Drives the selection of respiratory protection should the pit atmosphere require it during entry.
High-Risk Construction Work triggered
Underground telecommunications pits, manholes, and chambers are enclosed structures with restricted access, not designed for continuous occupancy, that can hold an oxygen-deficient, contaminated, or flammable atmosphere from ground gas, water ingress, or decomposition. Entry to splice fibre is confined-space work under WHS Regulation s. 291.
Failure to prepare a SWMS before High-Risk Construction Work commences is a contravention of WHS Regulation s. 291. Category 2 offences under WHS Act s. 32 — where a duty breach exposes a person to a risk of death or serious injury without proof of recklessness — attract substantial monetary penalties for body corporates and individual duty holders; refer to the current SafeWork NSW penalty schedule for the NSW-indexed 2025-26 figures. Category 1 reckless-conduct offences under WHS Act s. 31 attract up to approximately $10.42 million for a body corporate, $2.17 million for an individual PCBU or officer, and $1.04 million for an individual worker, with up to 10 years' imprisonment (NSW-indexed at 1 July 2025). VIC maximum penalties under the Occupational Health and Safety Act 2004 differ in structure and amount and are set at VIC variant-generation time.
Who this is for
- →Telecommunications contractors splicing fibre in underground pits and manholes.
- →NBN and carrier field technicians performing fibre work in confined pits.
- →Civil-telco contractors entering chambers for fibre installation and repair.
- →Network operators requiring a defensible confined-space SWMS from their field crews.
- →Fibre fault-finding teams entering pits to locate and repair cable faults.
What you receive
- ✓Editable Microsoft Word .docx — open in Word or Google Docs, drop in your company logo and ABN.
- ✓State-specific variant matched to the jurisdiction selected at checkout (NSW, VIC, QLD, SA, WA, TAS, NT, or ACT).
- ✓All 11 hazards risk-assessed with inherent and residual ratings against a documented control set.
- ✓Confined-space, traffic, and laser-safety controls referenced to AS 2865, AS 1742.3, AS/NZS IEC 60825, and the model codes.
- ✓Reg 291 HRCW breakdown showing the confined-space trigger and the legal duty to prepare the SWMS first.
- ✓CIH-reviewed content written to be defended in front of a network operator or a SafeWork inspector.
- ✓Instant download on payment, with a re-download window so you can retrieve the file again if needed.
- ✓Sign-on register and review-log structure ready for site-specific completion by the PCBU.
Worked example
A telecommunications contractor in Adelaide is engaged to splice a fibre cable in an underground pit located in the verge beside a suburban arterial road, repairing a fault that has taken several customers offline. The two-technician crew treats the pit as a confined space because it triggers the Reg 291 confined-space category, and prepares a SWMS before entry using this product with the SA variant which references the WHS Act 2012 (SA) and the SA framework. On arrival, a traffic management plan to AS 1742.3 is set up — signage, barriers, and a buffer separating the work area from the live traffic lane. The pit is atmospheric-tested for oxygen and flammable gas before entry and ventilated, with continuous monitoring and a stand-by attendant at the opening, and a rescue plan with retrieval equipment in place. The crew checks for water ingress and monitors the weather, with a means to evacuate the pit quickly if it floods. The fusion splice is completed, with glass-fibre offcuts collected in a dedicated container and laser-eye-safety procedures applied so no one looks into an energised fibre. The open pit is attended throughout to prevent a fall by a passer-by. On completion the pit is reinstated and the traffic control removed. The work is completed without an atmosphere, traffic, or fibre incident, and the signed SWMS, the confined-space entry permit, and the traffic-control records are retained by the contractor and provided to the network operator for its compliance records.
Related legislation
- Work Health and Safety Act 2011 (NSW) — Sections 19 (primary duty of care), 31 (Category 1 offence), 32 (Category 2 offence)
- Work Health and Safety Regulation 2017 (NSW) — Sections 291 (HRCW definition), 299 (SWMS), 66-77 (confined spaces)
- AS 2865-2009 — Confined spaces (atmospheric testing, entry permits, rescue arrangements)
- AS 1742.3:2019 — Manual of uniform traffic control devices, Part 3: Traffic control for works on roads
- AS/NZS IEC 60825 series — Safety of laser products (optical-source eye safety)
Frequently asked questions
Why is fibre splicing in a pit High-Risk Construction Work?
It triggers the Reg 291 confined-space category, because underground telecommunications pits, manholes, and chambers are enclosed structures with restricted access that can hold an oxygen-deficient, contaminated, or flammable atmosphere. A worker can be overcome before recognising the hazard, so a SWMS is required before entry and the pit is entered to AS 2865 with atmospheric testing, a permit, a stand-by attendant, and a rescue plan.
Is the splicing task itself the main hazard?
No. The splice is fine, precise work; the serious risks are in the context — the confined pit atmosphere, the position of the pit in a trafficked carriageway, water ingress, and the handling of glass-fibre offcuts and optical sources. The SWMS focuses on these surrounding hazards, which is where the high-consequence outcomes lie, rather than on the splicing technique itself.
What traffic controls are required?
Where the pit is in or near the carriageway, a traffic management plan to AS 1742.3 is implemented before any pit work — signage, barriers, lane control, and a buffer separating the crew from live traffic. Being struck by traffic is one of the highest-consequence hazards for pit work in a road reserve, so the traffic control is set up before the confined-space entry begins.
How is the glass-fibre offcut hazard managed?
Tiny glass-fibre offcuts can penetrate skin and are hard to see and remove, and are a hazard if ingested. The SWMS requires a fibre-disposal regime — a dedicated container, adhesive collection of offcuts, no eating or drinking in the work area, and skin protection — so the offcuts are contained and the crew is protected from penetration and ingestion.
What is the laser-eye-safety concern in fibre work?
Optical fibres and connectors can carry an optical source that can injure the eye if a worker looks directly into an energised fibre during splicing, testing, or fault-finding. The SWMS applies laser-eye-safety controls to AS/NZS IEC 60825 — never looking into an energised fibre, verifying sources are de-energised before inspection, and following the optical-safety procedures for the sources in use.