By OSHA – Occupational Safety and Health Administration
How do I know if the OSHA standard applies to me?
If your employees service or maintain machines where the unexpected startup, energization, or the release of stored energy could cause injury, the standard likely applies to you. The standard applies to all sources of energy, including, but not limited to: mechanical, electrical, hydraulic, pneumatic, chemical, and thermal energy.
The standard does not cover electrical hazards from work on, near, or with conductors or equipment in electric utilization (premise wiring) installations, which are outlined by Subpart S of 29 CFR Part 1910. You can find the specific lockout and tagout provisions for electrical shock and burn hazards in 29 CFR Part 1910.333. Controlling hazardous energy in installations for the exclusive purpose of power generation,
transmission, and distribution, including related equipment for communication or metering, is covered by 29 CFR 1910.269.
The standard also does not cover the agriculture, construction, and maritime industries or oil and gas well drilling and servicing. Other standards concerning the control of hazardous energy, however, apply in many of these industries/situations.