Access may vary during each stage of the machinery and equipment life cycle. For example: • installation or removal o complete access from every area may be required and involve disconnection or connection of services, such as water, air, pipes, installation of electrical cable to switch board • operation o access for set up, operation and adjustment • maintenance, repair, cleaning, alteration or adaptation o access to remote areas may be required.
Where exposure to machinery and equipment hazards cannot be eliminated or substituted for machinery and equipment of improved design, risk controls must be applied to the hazards to prevent or reduce the risk (chance) of injury or harm.
Administrative controls, such as effective supervision, instruction and training, are required to ensure that only one key is available for the system, and the key is not removed from the access gate or guard by a second operator while a person is exposed to the danger area of the plant. Operations such as maintenance, repair, installation service or cleaning may require all energy sources to be isolated and locked out to avoid accidental start-up.
• Separating people from non-mechanical hazards is necessary where the emission cannot be controlled at the source through elimination or substitution. Hazardous machinery and equipment emission controls rely largely on isolating of people from the hazardous emission. Hoods, lids, covers or impervious guards (solid barriers that prevent escape of the emission) can serve to contain a number of different types of emissions within machinery and/or equipment.