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Arc Flash Safety Boundaries

Updated on: February 2, 2026 3 MINUTE WATCH Published on: Feb 03, 2023

 

What's Arc Flash Safety Boundaries?

Video Transcription

When approaching a potentially dangerous situation, it's important to know what the boundaries are.

For electrical equipment, the NFPA 70E standard defines three specific boundaries to keep workers safe. The first is the arc flash boundary. This is the line that protects people from the heat of an arc flash.

To cross the arc flash boundary, workers need to have the proper PPE.

The next two are shock boundaries. Limited approach boundary. To enter this area, workers must have the proper PPE and either undergo specialized training or be accompanied by someone masked.

Then there is the restricted approach boundary. To enter this area, workers must have specialized training and a written and approved plan for the work they'll be doing.

NFPA 70E requires compliant arc flash labels to have the arc flash boundary listed and it's always good practice to include the shock protection boundaries as well. For more information about arc flash label requirements, visit graphic products dot com or follow the link and receive your free copy of our arc flash label quick reference guide.

 

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