Further guidance is available in the code of practice

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Further guidance is available in the Code of Practice: Managing Noise and Preventing Hearing Loss at Work 7.4 Energy sources The design should recognise and accommodate the possibility of a dangerous situation occurring where the energy source to the plant fluctuates or the energy source is discontinued and then resumed. In particular: the plant should default to the ‘off position,’ SAFE WORK AUSTRALIA MEMBERS’ MEETING 6 30 SEPTEMBER 2010 PAGE 40 OF 52
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if there is a risk of injury due to the plant restarting when the power resumes, the plant should remain in a de-energised state until the start sequence is commenced, the plant should not be able to restart automatically after power fluctuations, and protective devices should remain fully effective before, during and after any change to the status of the energy source. Where electrical equipment has been designed for use within certain voltage limits, only those specific requirements such as electrical standards and statutory requirements that address the design requirement should apply. Where plant is powered by an energy source other than electricity, such as hydraulic, pneumatic, thermal or stored kinetic energy, it should be designed to allow the plant to be constructed and equipped so as to avoid all potential hazards associated with these types of energy. 7.5 Static electricity Static electricity may cause an electric shock to a person. As a consequence the person may fall, or drop an object. Static electricity may also cause unintended combustion, for example where flammable fumes may be emitted. Where the build-up of potentially dangerous electrostatic charges creates a risk to health and safety, plant should be designed to prevent or limit the discharge, and/or be fitted with a discharging system. For example, spark detection and suppression systems can be incorporated into dust extraction systems to minimise the risk of explosion or fire. 7.6 Lightning The design of plant that is likely to be exposed to lightning while being used should incorporate a system for conducting any resultant electrical charges to earth. 7.7 Fire and explosion Certain types of plant have the potential to be a fire or explosion risk. A designer should eliminate or reduce risk of fire, overheating or explosion posed by the plant itself or by gases, liquids, dusts, vapours or other substances produced or used by the plant or other plant nearby. 7.8 Plant capable of entangling an operator Designers should make certain that moving parts of machines are designed in a way that prevents operator contact that may cause injury. In some instances this may be difficult to achieve as there may be a need to have rotating elements exposed during normal use. Radial drills, surface planers and milling machines commonly operate with the rotating tool unguarded and this presents a real risk of entanglement should the operator or the operators clothing come into contact with the rotating part. The most likely causes of contact are where the
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  • Fall '14
  • ........., Occupational safety and health

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