Machines are usually powered by the mechanical, chemical, thermal, or electrical means, and are often motorized. In the modern era, the advents of electronic technology have converted a machine into a form of non-movable development power tool.
Note: The Work Health and Safety Regulation 2011 prescribes specific requirements that must be taken into account when determining risk controls for both confined spaces and working at heights.
Captive key systems do not provide full isolation of the power source, but may provide limited temporary access under controlled conditions.
Selection and use of PPE requires careful consideration, as there are many different types that reduce the risk of injury of contact or exposure to a hazard. Incorrect use of PPE, or purchasing inappropriate PPE, can contribute to serious workplace incidents. PPE that is uncomfortable, restrictive or heavy may create secondary hazards, and, as a result, constant supervision may be necessary to ensure it is used effectively.