scope:

This standard establishes the minimum requirements for the control of energy sources to prevent release of harmful energy that could cause death, injury or illness to personnel performing construction and demolition work.

This standard does not cover the following:

Installations under the exclusive control of electric utilities for the purpose of power generation, transmission and distribution, including related equipment for communication or metering; exposure to electrical hazards from work on, near or with conductors or equipment in electric utilization installations.

Purpose. The purpose of this standard is to establish procedures for the protection of personnel and property from injury due to the unexpected energization or start-up of machines or equipment or release of stored energy in, on or around machines or equipment during repair, maintenance, servicing, installation and associated activities. To ensure that before any worker services equipment where the potential exists for unexpected energization or start-up of equipment or the release of stored energy, the machine or equipment is isolated from the energy source and rendered inoperative.