1.1 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.

1.2 Purpose

The purpose of this standard is to establish procedures for the protection of property and personnel from injury due to the:

• unexpected energization;
• start-up;
• inadequate insulation;
• inadequate isolation; or
• release of active or stored energy

of machines, equipment, vehicles, tools, etc. in, on or around machines, tools or equipment during repair, maintenance, servicing, installation, testing and associated construction and demolition activities.

The purpose is to ensure that before any worker services, maintains, works on or near equipment where the potential exists for exposure to un-isolated energy or unexpected energization, start-up of equipment or the release of stored energy, that the machine, equipment, vehicles or tools, etc. is isolated from the energy source and rendered inoperative.