Scaffolding near power lines is one of the most strictly regulated and genuinely dangerous activities on any NZ property. In short: there are mandatory safe approach distances set by WorkSafe NZ, and in most cases you must notify or involve your lines company before any work begins. Getting this wrong can be fatal.
Why Power Lines Are So Dangerous
Overhead power lines — including the ones running to your house — are almost never insulated in the way most people assume. The weatherproofing on distribution lines is not designed to protect someone who makes contact with them. Even working near a live line without touching it can cause electrocution through arcing, where electricity jumps through the air. Metal scaffolding tubes are excellent conductors, making the risk especially high.
The Legal Framework in New Zealand
In NZ, working near power lines is governed by the Health and Safety at Work Act 2015 and the associated regulations. WorkSafe NZ sets out the requirements for managing electrical hazards on worksites, including residential properties where contractors are working.
Key points from WorkSafe guidance:
- A person conducting a business or undertaking (PCBU) — which includes a homeowner who has engaged a contractor — has duties to ensure work is carried out safely.
- The scaffolding contractor also carries duties as a PCBU and must manage the risk of working near live lines.
- If you are a homeowner doing DIY scaffolding (which is uncommon but not always prohibited), you are still responsible for managing hazards on your property.
Safe Approach Distances
WorkSafe NZ specifies minimum safe approach distances for unqualified workers near overhead lines. These distances vary depending on the voltage of the line:
| Line Type | Typical Voltage | Minimum Approach Distance |
|---|---|---|
| Service line to house (low voltage) | Up to 1,000 V | 2 metres |
| Distribution lines (street/local) | 11,000 V or higher | 4 metres or more |
| Transmission lines (high voltage) | 33,000 V+ | Contact lines company |
Important: These are general guidance figures. Always confirm exact requirements with your lines company and WorkSafe NZ, as distances can vary based on specific line voltage and local network rules.
If your scaffolding will come within these distances, work cannot simply proceed — specific controls must be put in place first.
What Must Happen Before Work Starts
1. Identify the Lines
Before any scaffold is erected, identify all overhead lines on or near the property. This includes the service line (the line running from the street pole to your house), which is the responsibility of your lines company (e.g., Vector, Unison, Orion, Powerco, depending on your region).
2. Contact Your Lines Company
If scaffolding will come within the safe approach distances, you or your scaffolding contractor must contact the lines company before work begins. They can:
- Confirm the voltage and ownership of the lines
- Arrange a temporary disconnection or isolation of the service line
- Install line guards (insulating covers) over the lines while work is underway
- Advise on any additional controls required
Do not assume the lines company will act quickly — allow several working days notice at minimum, and potentially longer for complex situations.
3. Implement a Safe Work Plan
Your scaffolding contractor should have a documented safe work method statement (SWMS) or similar plan that addresses the power line hazard. This is standard professional practice and may be required under their own health and safety obligations.
What Homeowners Can and Cannot Do
Scaffolding erection is not legally restricted work in the same way that electrical or plumbing work is — there is no licensing requirement that prevents a homeowner from erecting a simple scaffold. However, working near power lines introduces serious hazards that make DIY scaffolding near lines extremely inadvisable.
For any work within the safe approach distances of live lines:
- Do not proceed without contacting your lines company first — this is non-negotiable.
- Do not rely on rubber gloves, wooden handles, or other improvised protection.
- Do not assume a line is safe because it looks insulated or old.
For electrical work itself — including anything involving your switchboard, meter, or the service line connection — this is restricted electrical work that must be carried out by a registered electrician. See the Electrical Workers Registration Board (EWRB) for more information.
Building Consent Considerations
Scaffolding itself generally does not require a building consent, but the work the scaffolding supports (e.g., re-roofing, re-cladding) may. Always check with your local council whether the underlying project requires consent. The MBIE Building Performance website has useful guidance on Schedule 1 exemptions.
When to Call a Professional
You should always engage a qualified, experienced scaffolding contractor when:
- Any overhead power lines are within or near the work zone
- The scaffold is more than a simple low-level platform
- You are unsure about the voltage or ownership of nearby lines
- The lines company requires a third party to manage the hazard
A professional scaffolder will know how to liaise with the lines company, implement the correct controls, and keep everyone on site safe. You can find qualified local scaffolders on tradedirectory.co.nz.
⚠️ Safety note: Never touch, move, or work near a power line without confirmation from your lines company that it has been isolated or adequately protected. Electricity can kill instantly and without warning.
