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WorkSafe has recently investigated a number of incidents that involved mobile cranes making contact with live overhead power lines, especially on rural and agricultural properties. These incidents highlight the importance of ensuring that mobile crane operators and other workers are aware of the location of overhead power lines before machinery is operated. This is also relevant for operators of other mobile plant, such as vehicle-loading cranes, concrete placing booms and elevating work platforms.
In many of the reported incidents, it was not possible for the person conducting the business or undertaking (PCBU) or crane operator to identify the presence and positioning of overhead power lines prior to attending site due to the remote locations. This exposed workers and others to the risks involved with mobile plant contacting overhead power lines, including the potential for electric shock.
Work Health and Safety Act 2020
The PCBU must ensure that the regulator is notified of any dangerous incident at a workplace that exposes a worker or any other person to a serious risk to their health or safety from exposure to electric shock.
Work Health and Safety (General) Regulations 2022
The PCBU or person with management or control of a workplace must ensure that a worker, or any plant or material used or controlled by a worker, does not enter the danger zone of an overhead electric line or aerial bundled conductor line.
The danger zone is anywhere within:
A detailed site survey, which can reduce the risk of a collision with overhead power lines, should be conducted before preparing the lifting plan, completing a risk assessment and operating the crane.
Spatial knowledge from online tools, such as Western Power’s geospatial map viewer – Network capacity mapping tool (NCMT), can support PCBUs and crane operators to identify and assess the location of overhead high voltage transmission lines in rural and remote locations. However, online tools such as the NCMT are not necessarily complete and should not be relied upon as a substitute for independent research and professional advice.
Information from satellite-mapping apps or platforms should not be used as a replacement for risk assessments and lifting plans conducted on site prior to work being undertaken.
When working near overhead power lines PCBUs, operators and other duty holders, such as site supervisors, should ensure that:
Safe Work Australia
Western Power
Standards Australia
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