Quick answer: Electrical hazards are among the leading causes of death and serious injury on Australian construction sites. Work on or near energised electrical installations is classified as High Risk Construction Work (HRCW) under WHS Regulations, requiring a SWMS before work begins.
Last reviewed: March 2026 by the BlueSafe Technical Team. Reflects current Model WHS Regulations.
Electrical hazards are among the most dangerous risks on construction sites. Understanding how to identify and control these hazards is essential for preventing serious injuries and fatalities.
Types of Electrical Hazards
Construction sites present multiple electrical hazards:
- Direct contact with live wires or equipment
- Indirect contact through conductive materials
- Arc flash from short circuits or equipment failure
- Electrical fires from faulty wiring or overloaded circuits
- Underground and overhead services that may be struck during excavation or crane work
Identifying Electrical Hazards on Site
Before work begins, conduct a thorough assessment:
- Locate services – Use dial-before-you-dig and service locators
- Check for overhead powerlines – Maintain safe approach distances
- Inspect electrical equipment – Look for damaged cords, missing guards, and weathering
- Review temporary power setups – Ensure proper installation and protection
- Identify wet areas – Water increases conductivity and risk
Control Measures
Apply the hierarchy of controls to electrical hazards:
Elimination and Substitution
- De-energize circuits before work where possible
- Use battery-powered tools instead of mains power
- Relocate work away from live electrical infrastructure
Engineering Controls
- Install residual current devices (RCDs) on all circuits
- Use physical barriers around switchboards and live equipment
- Ensure proper earthing and bonding
Administrative Controls
- Implement permit-to-work systems for electrical work
- Provide training on electrical safety awareness
- Display warning signs near electrical hazards
Personal Protective Equipment
- Insulated gloves and footwear for electrical workers
- Arc flash rated clothing where required
- Safety glasses and face shields
Emergency Response
Prepare for electrical emergencies:
- Know how to isolate power quickly
- Train workers on CPR and first aid for electric shock
- Have a clear emergency procedure displayed on site
- Ensure rescue equipment is available near high-risk areas
Key Takeaways
- Electrical hazards can cause serious injury or death – treat them with respect
- Always assume electrical equipment is live until proven otherwise
- Use RCDs on all temporary power supplies
- Maintain safe distances from overhead and underground services
- Train all workers to recognize electrical hazards
State and Territory Variations
The information on this page is based on the Model WHS Regulations published by Safe Work Australia, which have been adopted (with minor variations) by most states and territories.
| Jurisdiction | WHS regulator | Key notes |
|---|---|---|
| NSW | SafeWork NSW | Adopted Model WHS Regulations |
| VIC | WorkSafe Victoria | Uses OHS Act 2004 — electrical licensing requirements apply |
| QLD | Workplace Health and Safety Queensland | Adopted Model WHS Regulations |
| SA | SafeWork SA | Adopted Model WHS Regulations |
| WA | WorkSafe Western Australia | Adopted Model WHS Regulations (2022) |
| TAS | WorkSafe Tasmania | Adopted Model WHS Regulations |
| ACT | WorkSafe ACT | Adopted Model WHS Regulations |
| NT | NT WorkSafe | Adopted Model WHS Regulations |
Always verify current electrical licensing and safe approach distance requirements with your state regulator, as these vary by jurisdiction.
Related guides
- The 18 High-Risk Construction Work Activities in Australia
- Hierarchy of Controls: 5 Levels Explained
- Confined Space Entry: Safety Procedures
- How to Write a Safe Work Method Statement (SWMS)
Frequently asked questions
What are the most common electrical hazards on construction sites?
The most common hazards are direct contact with live wires, arc flash, electrical fires from faulty wiring, and striking underground or overhead services. All are potentially fatal.
What is an RCD and is it required?
An RCD (Residual Current Device) cuts power within milliseconds if a fault is detected. Australian WHS Regulations require RCDs on all temporary electrical supplies on construction sites.
What is arc flash?
Arc flash is an electrical explosion from a short circuit that releases intense heat, light, and pressure. It can cause severe burns and death in milliseconds. Arc flash rated clothing is required near switchboards and live equipment.
Does working on energised electrical installations require a SWMS?
Yes. It is one of the 18 HRCW activities under WHS Regulations. A SWMS must be prepared before this work begins.
Need electrical safety documentation? View our electrical SWMS templates.