Learn about Arc Flash and how Melbourne Water is managing this risk using hierarchy of controls and a practical approach to PPE selection. Under the Occupational Health and Safety Act 2004, employers must provide and maintain a working environment that is safe and free of risk to health, so far as is reasonably practicable. The risk of electrocution and its prevention have long been understood and managed. But there is another risk, electrical arc flash, that has had far less attention. It is only recently that wider industry is actively addressing this risk.