Overhead Power Line Safety
The Problem
Overhead power lines are a hidden but deadly hazard on many job sites. Workers often fail to notice them until it's too late. Whether it’s moving equipment, handling materials, or operating vehicles, the risks of contact with these lines are significant. Today, we’ll address the dangers of overhead power lines, common scenarios that lead to accidental contact, and practical solutions to prevent electrocution.
Identify the Hazards
Uninsulated Lines: Many overhead power lines are uninsulated, meaning direct or indirect contact can result in electrocution.
Path to Earth: Electricity flows through conductive materials, such as tools, equipment, and the human body, seeking a path to earth.
Common Hazards:
- Accidental contact while using metal tools or operating equipment near power lines.
- Failing to notice overhead lines when focused on ground-level or lateral risks.
- Insufficient clearance distances, increasing the risk of arcing or direct contact.
Safety Practices and Preventative Measures
Look Up and Assess the Area:
- Before starting work, inspect the area for overhead or nearby power lines.
- Always treat power lines as live unless confirmed isolated by the electricity provider or Competent Person.
Maintain Safe Distances:
- Keep a minimum approach distance of 4 metres from overhead lines for plant, tools, or materials unless approval is given and control measures are in place.
- For high-voltage lines or transmission lines, follow guidance from the electricity network operator
Use Spotters or Observers:
- Assign a trained observer to guide machinery or materials near power lines to ensure safe clearance.
Use Non-Conductive Tools:
- Use tools made from non-conductive materials such as fibreglass when working near power lines.
Plan and Monitor High-Risk Tasks:
- Take extra precautions during these activities:
- Moving portable metal ladders or scaffolding.
- Operating elevated work platforms or scissor lifts.
- Raising forklift loads or tipping truck beds.
- Using cranes to move or swing loads.
- Handling long metal items like pipes, roofing sheets, or flashing.
- Moving portable metal ladders or scaffolding.
Real-Life Case or Scenario
A few years ago, a worker suffered fatal injuries when a crane boom contacted an uninsulated power line while unloading materials. The worker and the equipment were not maintaining the required clearance distance, and no observer was present. This tragic incident highlights the importance of assessing overhead risks and maintaining proper exclusion zones.
Employee Responsibilities
- Survey your work area for overhead power lines before starting any task.
- Maintain safe approach distances—minimum 4 metres—unless isolated and controlled.
- Use non-conductive tools and report any hazards or unsafe conditions.
- Follow all procedures when moving equipment or handling materials near power lines.
Employer Responsibilities
- Ensure workers are trained to identify and manage overhead power line risks.
- Provide suitable equipment and non-conductive tools.
- Develop and implement site-specific procedures for working near live overhead lines.
- Assign observers when required and ensure consultation with electricity providers where necessary.
Discussion & Questions
- “Have you ever worked near overhead power lines? What precautions did you take to stay safe?”
- “What tasks do you perform that bring you close to power lines? Let’s discuss how to handle them safely.”
Encourage workers to share experiences or raise any concerns.
Commitment/Action Plan
Let’s commit to making overhead power line safety a priority. Before lifting, moving, or handling tools or materials, take time to assess the area overhead. Maintain exclusion zones, use spotters, and speak with your supervisor if you’re unsure.
Wrap-Up
Overhead power lines are a serious hazard—but one we can manage with proper awareness and safe practices. Always look up, stay alert, and follow safe distances. Thank you for your attention and for helping keep everyone safe on site.
Standards Overview
WorkSafe NZ requires duty holders to manage risks under the Health and Safety at Work Act 2015 and associated Regulations.
- The Electricity (Safety) Regulations 2010 and WorkSafe’s guidance on “Safe distances from live electrical lines” outline minimum approach distances and control measures.
- Safe approach distances must be observed, and no work should occur within these zones unless the lines are de-energised or insulated with authorisation.
- Employers must implement training, signage, and controls to protect workers from electrical risks.
Disclaimer
These toolbox talks are provided for informational and educational purposes only and are not a substitute for professional legal, health and safety, or regulatory advice.
The content reflects recognised best practices and general industry standards as at the date of publication. However, it may not be applicable to all workplace environments or specific operational contexts.
It is the responsibility of the Person Conducting a Business or Undertaking (PCBU), as well as officers, workers, and other duty holders under the Health and Safety at Work Act 2015 (HSWA), to ensure compliance with all relevant laws, regulations, and WorkSafe New Zealand guidance.
The authors, presenters, and distributors of this toolbox talk disclaim all liability for any loss, damage, or injury arising from the use or reliance on the information provided. Users should seek advice from a suitably qualified health and safety professional or legal advisor for guidance tailored to their specific circumstances.
Always follow your organisation’s policies, procedures, and safe work practices to manage risks and maintain a safe and healthy workplace.
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