PREAMBLE Employees servicing or maintaining machines or equipment may be exposed to serious physical harm or death if hazardous energy is not properly controlled. Craft workers, machine operators, and laborers are among the 3 million workers who service equipment and face the greatest risk. The four-page general industry standard (29 CFR 1910.147), published in September 1989, was designed to prevent the accidental start-up of machines or other equipment during maintenance and servicing. Under the rule, hazardous energy sources must be "isolated and rendered inoperative" before work can begin. Hazardous energy sources include electrical, mechanical, hydraulic, pneumatic, chemical, thermal or, as in the […]

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