This is an essential safety procedure that protects workers from injury while working on or near electrical circuits and equipment by locking the device and/or power source to prevent anyone from turning on the hazardous power sources while someone is performing maintenance or servicing work:

Important OSHA Electrocution Hazards Overhead and Buried Power Lines: Contact with high-voltage lines causes fatal injuries or burns. Improper Grounding: Missing ground pins or broken paths to ground can leave equipment energized, which is a frequent OSHA violation. Damaged Tools/Cords: Frayed, old, or damaged extension cords and power tools can expose live wires. Lack of GFCI Protection: Ground-Fault Circuit Interrupters (GFCIs) are required to prevent electrical shock in wet or dangerous environments. Overloaded Circuits: Plugging too many devices into one circuit causes... Show more

Important OSHA Electrocution Hazards
Overhead and Buried Power Lines: Contact with high-voltage lines causes fatal injuries or burns.
Improper Grounding: Missing ground pins or broken paths to ground can leave equipment energized, which is a frequent OSHA violation.
Damaged Tools/Cords: Frayed, old, or damaged extension cords and power tools can expose live wires.
Lack of GFCI Protection: Ground-Fault Circuit Interrupters (GFCIs) are required to prevent electrical shock in wet or dangerous environments.
Overloaded Circuits: Plugging too many devices into one circuit causes overheating.
Inadequate Lockout/Tagout (LOTO): Failing to de-energize equipment before maintenance. 

Hazard Reduction Strategies
Insulation: Tools must have properly insulated handles.
Grounding: Ensure all equipment is grounded, and do not remove ground prongs.
Inspections: Use a competent person to inspect tools and equipment for damage (e.g., exposed wires).
PPE: Use rubber gloves, mats, and insulating equipment.
Safe Distance: Maintain a minimum of 10 feet from overhead power lines. 

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