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Hazardous energy in occupational safety and health is any source of energy (including electrical, mechanical, thermal, chemical, hydraulic, and pneumatic sources of energy) that "can be hazardous to workers", such as from discharge of stored energy.
Identify the energy sources; Isolate the energy sources; Lock and tag the energy sources; Demonstrate that the equipment isolation is effective; The locking and tagging of the isolation point ensures that others cannot de-isolate the device. Emphasizing the last step, the entire process can also be referred to as lock, tag, and try. [citation ...
Standard 29 CFR 1910.269 – for electric power generation, transmission, and distribution, contained comprehensive regulations and addressed control of hazardous energy sources for power plant locations; Standards are compared with those of IEEE and National Fire Protection Association. [4] [5]
Equipment can be designed or modified for safe operation in hazardous locations. The two general approaches are: Intrinsic safety Intrinsic safety, also called non-incendive, limits the energy present in a system, such that it is insufficient to ignite a hazardous atmosphere under any conditions. This includes both low power levels, and low ...
Radio frequency (RF) energy at power density levels of 1–10 mW/cm 2 or higher can cause measurable heating of tissues. Typical RF energy levels encountered by the general public are well below the level needed to cause significant heating, but certain workplace environments near high power RF sources may exceed safe exposure limits. [7]
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A dangerous restart occurs when power or energy is applied to a device whose "on / off" switch was in the "on" position when power was applied. In the United States the National Institute for Occupational Safety and Health (NIOSH) refers to this hazard as "The Uncontrolled Release of Mechanical, Electrical and Other Types of Hazardous Energy" [1]
In hazard identification, sources of data on the risks associated with prospective hazards are identified. For instance, if a site is known to be contaminated with a variety of industrial pollutants, hazard identification will determine which of these chemicals could result in adverse human health effects, and what effects they could cause ...