Electric Power >> Energized vs. Deenergized Work
Energized vs. Deenergized Work
Many electrical lines, circuits, and systems are worked on while energized. This is often because the system loading or its configuration, or both, makes it impossible to deenergize the system, or because continuity of customer service must be maintained. However, some work can only be done with the system deenergized, such as splicing underground cable or work inside a boiler. Most electric work can be done safely while energized using special techniques and equipment that have been developed over the years.
Merely opening a switch or closing a valve does not satisfy the requirements for treating a system as deenergized. A system is not properly deenergized until all of the hazardous energy control requirements in 1910.269(d) for generation installations or 1910.269(m) for transmission and distribution lines and equipment have been met and the system is properly grounded per 1910.269(n). Any system not meeting these requirements must be worked on as if it were energized.
Minimum Approach Distances (MAD)
Hazardous Energy Control
Disabling of Reclosers and Remotely Operated Devices
Live Line/Bare Hand Work
Grounding for Employee Protection
Insulating Gloves and Sleeves
Insulating Protective Equipment