High Voltage Cable Jointing & Termination SWMS
HV cable preparation, heat-shrink or cold-shrink jointing, and termination of 11 kV and 33 kV cables in substations, pits, and cable trenches.
SWMS variants reference your state's WHS legislation. Instant download after payment.
High voltage cable jointing and termination covers the preparation, jointing, and termination of 11 kV and 33 kV polymeric and paper-insulated cables in substations, pits, and cable trenches. The work is performed by qualified HV cable jointers under the authorisation of the network operator (in NSW, a Level 2 or Level 3 Accredited Service Provider depending on the network connection class). Cable jointing is High-Risk Construction Work under WHS Regulation s. 291 — the work either occurs on or near energised electrical installations (where adjacent feeders remain live) or on equipment about to be energised, where any defect in the joint becomes a stored hazard until the next pressure test or fault. This SWMS template covers the practical hazards of HV cable preparation: knife and stripping tool injuries, conductor screen and semi-conductive layer removal, void-free silicone or epoxy filling, stress-cone application, and HV pressure testing of the completed joint. The applicable standards include AS 2067 (Substations and high voltage installations exceeding 1 kV a.c.), AS/NZS 1429.1 (Electric cables — Polymeric insulated — For working voltages 1.9/3.3 (3.6) kV up to and including 19/33 (36) kV), and AS/NZS 3000:2018 for the LV side of any combined LV/HV installation. NSW work additionally requires compliance with Electrical Safety Office requirements and the network operator's connection conditions; ASP authorisation is non-transferable between networks.
Hazards identified
11 hazards covered, sorted by priority.
Fatal — HV contact at 11 kV or 33 kV is virtually always fatal due to the energy density and arc duration. Survival is exceptional.
Severe to fatal burns. HV arc flash energy is typically 10–100× higher than LV — full-body burns are common even in well-fitted PPE.
Significant electric shock during work on apparently dead cables. Particularly hazardous on long runs in shared trenches.
Electric shock to worker handling apparently dead cable. HV cables retain charge and require positive earthing for the duration of work.
Deep lacerations to hands and forearms from sharp jointing knives and stripping tools. Most common HV jointer injury by frequency.
Respiratory irritation, dermatitis, sensitisation. Long-term repeated exposure is a recognised occupational hazard for HV jointers.
Asphyxiation from oxygen-deficient or contaminated atmosphere; entrapment if access is restricted; delayed rescue exposure from limited entry geometry.
Musculoskeletal injury — back, shoulders, wrists. HV jointing kits are heavy and the work posture is often awkward in confined pits.
Burns and projectile injury from arc and ejected cable components. Pressure testing carries inherent failure risk that the test is designed to find.
Crush injury or fatal pedestrian strike. Many HV pits are in road reserves or kerb-side locations.
Heat exhaustion impairing the precision required for void-free joint construction. Joint quality directly affects asset life and fault risk.
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Eliminate adjacent live exposure where reasonably practicable — coordinate with the network operator for outage of parallel circuits in the same trench or duct bank.
- 2Permit-to-Work issued by the network operator's authorised switching person before any HV work commences. The permit identifies the cable section, isolation and earthing arrangements, and authorised personnel.
- 3Positive earthing of the worked cable at both ends, confirmed by visual inspection. The earth remains in place for the duration of the work; it is only removed for the final pressure test under permit.
- 4Test-before-touch using a calibrated HV voltage detector and proving unit appropriate to the working voltage class (11 kV or 33 kV).
- 5HV insulating gloves rated to the working voltage class, in current test certification (typically 6-monthly), with leather over-gloves for mechanical protection during knife work.
- 6Arc-rated clothing system selected to the calculated incident energy at working distance — typically Category 4 (40 cal/cm²) for HV work, with full hood and face shield.
- 7Confined-space entry permit when working in cable pits — atmospheric testing for oxygen, LEL, CO, and H2S before entry; continuous monitoring during work; rescue plan with topside attendant.
- 8Knife discipline — purpose-designed jointing knives with retracting blades or cap-on-tool storage between cuts; no makeshift cutting tools.
- 9Curing-agent ventilation and PPE — chemical-cartridge respirator (P2 + organic vapour) for epoxy work in confined spaces; nitrile gloves under leather over-gloves for skin protection.
- 10Pre-start brief covering the joint specification, kit components, environmental conditions affecting cure (temperature, humidity), and the specific sequence the manufacturer requires for void-free filling.
- 11Manual handling assessment — mechanical aids (cable rollers, kit trolleys) for any item over 20 kg; team lift for cable drums; postural rotation in confined pit work.
- 12HV pressure testing performed under a separate test permit; exclusion zones extended during the test; remote-trigger test set used where the test geometry allows.
- 13Traffic management plan compliant with AS 1742 series for any work in road reserves; lane closure permits and traffic controllers as required by the road authority.
- 14Heat-stress monitoring and rotation of personnel for sustained work above 30 °C ambient; hydration breaks documented in the daily site diary.
- 15Post-joint inspection and test record retained for the asset's life — joint failures decades after installation are commonly traced to documented voids or improper cure conditions in the original work.
Applicable Codes of Practice
Becomes legally binding under Section 26A of the WHS Act from 1 July 2026. The Code's electrical work provisions explicitly extend to HV work under network operator authorisation. SafeWork NSW inspectors apply the Code to the conduct of HV jointing on construction sites and substation upgrade work.
Australian Standard governing HV substation design, installation, and maintenance. Defines safety clearances, earthing requirements, and the working procedures for installations above 1 kV. Cited in network operator connection standards and forms the practice baseline for HV cable termination work in substations.
The product standard for 11 kV and 33 kV polymeric cables installed in Australian distribution networks. Specifies cable construction, conductor sizing, and the testing regime that governs whether a completed joint is fit for service.
Becomes legally binding under Section 26A of the WHS Act from 1 July 2026. Cable pits and substation cable basements are confined spaces under the WHS Regulations — the Code's atmospheric testing, entry permit, and rescue provisions apply to HV jointing work in those locations.
Becomes legally binding under Section 26A of the WHS Act from 1 July 2026. Sets out the SWMS preparation requirements for High-Risk Construction Work under WHS Reg s. 291 and the principal contractor's WHS management plan obligations under WHS Reg s. 309.
High-Risk Construction Work triggered
HV cable jointing is performed in proximity to other live HV feeders in shared trenches, ducts, and substation bays. Even where the worked cable is positively earthed, the work environment includes energised installations within the WHS Regulation s. 291 trigger zone. Network operator authorisation does not remove the HRCW classification.
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
- →Qualified HV cable jointers performing 11 kV or 33 kV jointing and termination work in distribution networks.
- →Accredited Service Providers (NSW Level 2 / Level 3) performing customer connection work on Ausgrid, Endeavour, or Essential Energy networks.
- →Network operator field staff performing planned and breakdown HV cable repairs.
- →Substation construction contractors installing new HV switchgear and cable terminations in greenfield substations.
- →Principal contractors coordinating HV cable work as part of larger construction or infrastructure projects.
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).
- ✓11 hazards documented with worst-case consequence, inherent risk rating, residual risk rating, and HIGH/MEDIUM/LOW priority.
- ✓15 control measures ordered by hierarchy of controls — elimination first, PPE last.
- ✓References to AS 2067, AS/NZS 1429.1, AS/NZS 3000:2018, and the Confined Spaces Code of Practice.
- ✓Cross-reference to the related Confined Space Entry SWMS (existing trade master) for cable pit work.
- ✓Permit-to-Work and HV pressure test permit integration points for your existing safety management system.
- ✓Section for principal contractor sign-off and worker acknowledgement signatures.
Worked example
An Accredited Service Provider (Level 2) in Brisbane is engaged to install a new 11 kV customer connection for a multi-storey commercial development in Fortitude Valley. The work involves jointing two new 11 kV polymeric cables to existing distribution feeders in a kerb-side cable pit, with adjacent feeders remaining energised throughout. The contracted job value is $18,500 over three days. Before work commences, the lead jointer issues this SWMS to the principal contractor and to Energex, the network operator. The work proceeds under an Energex permit-to-work specifying the isolated cable section, the earthing arrangement at both ends, and the authorised personnel. A confined space entry permit is opened for the pit; atmospheric testing returns 20.9% O₂ and zero LEL, and continuous monitoring is established with a topside attendant. The jointer dons Category 4 arc-rated PPE and HV-rated insulating gloves, performs the cold-shrink termination per the manufacturer's procedure, and the completed joint passes its 28 kV pressure test. The earth is removed under permit, the cable energised by the network controller, and the permit closed.
Related legislation
- Work Health and Safety Act 2011 (NSW) — Sections 19, 31, 32, 46–49, 242B
- Work Health and Safety Regulation 2017 (NSW) — Sections 291 (HRCW definition), 299 (SWMS), 66 (confined spaces), 309 (WHS management plan)
- Electrical Safety Act 2017 (NSW) and Electrical Safety Regulation 2018 (NSW) — including ASP authorisation for distribution network work
- AS 2067 — Substations and high voltage installations exceeding 1 kV a.c.
- AS/NZS 1429.1 — Polymeric-insulated cables for working voltages above 1.9/3.3 kV
Frequently asked questions
Do I need ASP authorisation to perform this work?
In NSW, work on the distribution network at the connection point typically requires Accredited Service Provider authorisation — Level 2 for service mains and metering, Level 3 for sub-transmission and substation work above the connection point. ASP authorisation is non-transferable between networks (Ausgrid, Endeavour, Essential Energy, Evoenergy each maintain their own panel of ASPs). Other states have equivalent authorisation schemes — Energex/Ergon contractor accreditation in QLD, AusNet/Powercor accreditation in VIC. The applicable authorisation depends on the work location and the network operator.
How does this SWMS relate to the existing Confined Space Entry SWMS?
Cable jointing in pits is a confined space activity under the WHS Regulations, and the existing Confined Space Entry SWMS (sold separately as a trade master) governs the atmospheric testing, entry permit, and rescue arrangements. This HV cable jointing SWMS layers the HV-specific hazards and controls on top of the confined space requirements — both SWMS apply to pit work, and the principal contractor coordinates the two on-site.
What's the difference between this and the existing Cable Pulling SWMS?
The existing Cable Pulling & Installation SWMS covers the LV (low voltage) cable trade — pulling cables through conduits, cable trays, and ducts at distribution voltages below 1 kV. This HV Cable Jointing SWMS covers the high voltage trade — jointing and terminating 11 kV and 33 kV cables, which is a distinct discipline with different equipment, training, and authorisation requirements. The two SWMS do not overlap in scope.
Does Victoria use the same SWMS framework?
Victoria operates under the Occupational Health and Safety Act 2004 and OHS Regulations 2017, not the WHS Act and WHS Regulation. The substance of the HV jointing controls is identical, but the legal framing differs — the High-Risk Construction Work concept is replaced by Construction Work Compliance Code obligations, and the regulator is WorkSafe Victoria. Energy Safe Victoria additionally regulates electrical work under the Electricity Safety Act 1998 (Vic). The VIC variant of this SWMS substitutes the legislative references at variant-generation time.
Why is Category 4 arc-rated PPE specified?
HV arc flash incident energy is typically an order of magnitude higher than LV. Arc-rated clothing is rated by cal/cm² of incident energy it can absorb without breakopen — Category 4 PPE is rated to 40 cal/cm² and represents the standard HV jointing baseline. The actual category required for a specific job depends on incident energy calculation at the working distance from the prospective fault point — that calculation is part of the network operator's authorisation paperwork or the contractor's own risk assessment under AS/NZS 4836:2023.
How long does the SWMS need to be retained?
Under WHS Regulation s. 300, the SWMS must be retained for the duration of the work and, if the work is connected to a notifiable incident, for at least 2 years after the incident. Many network operators contractually require longer retention — 7 years is typical, and asset-related records (joint location, kit serial numbers, test results) are commonly retained for the life of the asset because joint failures decades after installation can be traced to original work conditions.
Document details
Buy the complete Electrical SWMS for $35 AUD
Covers every electrical task in one document instead of purchasing each sub-activity separately. Editable DOCX, same author, same state-specific delivery.
More Electrical sub-task SWMS
Each single-activity template is $19 AUD.