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Course Background

Transmission and Distribution - Lockout/Tagout: LOTO Devices

Duration: thirteen minutesLanguages: English

This course explains the purpose, selection, and proper use of Lockout/Tagout devices used to isolate hazardous energy in transmission and distribution operations.

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Course Description

This course focuses on the Lockout/Tagout devices that make hazardous energy control effective in transmission and distribution environments. It explains how different devices physically isolate energy sources and provide clear visual warnings to prevent accidental re-energization during maintenance or servicing. The module covers common devices such as padlocks, hasps, cable lockouts, circuit breaker lockouts, plug lockouts, group lockout boxes, and LOTO tags, emphasizing when and why each device is used. Special attention is given to the challenges of complex, high-risk T&D systems, where multiple energy sources and multiple workers are often involved.


Learning Objectives:

  1. Identify common Lockout/Tagout devices used in transmission and distribution operations and the energy sources they control.
  2. Describe how padlocks, hasps, group lockout boxes, and tags support individual and group safety during maintenance activities.
  3. Recognize the importance of proper device selection, labeling, and visual warnings in preventing accidental energization.
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