Nominal voltage Minimum approach distance

• not exceeding 132,000 V - 3 metres
• above 132,000 V but not exceeding 330,000 V - 6 metres
• above 330,000 V - 8 metres

In calculating these distances the following factors should be considered:

• the sag of the overhead powerlines.
• the swing of the load during handling.
• the effect of wind forces.

If there is a possibility that minimum safe approach distances cannot be maintained, the relevant electricity power supply authority must be contacted and a written risk assessment and a safe system of work developed. For example, accidental contact with long conductive materials being used such as guttering, scaffold or guardrail poles etc.

A safety observer should also be present to observe the position of the plant, tools or materials and to warn workers that they are approaching the proximity of the overhead powerlines.

Further guidance on the operation of cranes, mobile plant including EWPs in close proximity to overhead powerlines can be found in the Interim Guide for Operating Cranes and Plant in Proximity to Overhead Powerlines and AS2550.1 Cranes, hoists and winches – Safe use Part 1: General requirements.

Elimination
Eliminate the risk of shock or burns by:

• switching off the supply;
• isolating the supply;
• taking precautions to ensure that the supply remains isolated by locking-off and/or tagging, or by disconnecting the load side of the isolator and tying back disconnected conductors;
• proving the supply is de-energised by using an approved testing instrument.

Use of personal protective equipment (PPE)
Frequently personal protective equipment (PPE) is necessary, such as:

• a safety helmet with face shield (as appropriate)
• safety glasses/face shields (anti-flash)