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Understanding Arc Flash Boundaries: A Guide to Safety Labeling

Understanding Arc Flash Boundaries: A Guide to Safety Labeling

Updated on: February 3, 2026 2 MINUTE WATCH Published on: Feb 12, 2024

In this video, we will talk about the critical aspects of Arc Flash Boundaries, providing a clear understanding of what they are and their importance in electrical safety. You'll learn how to accurately determine and label these boundaries, ensuring compliance with safety standards and protecting workers from potential hazards.

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Additional Resources:

• Read Meeting Industry Standards: Arc Flash Label Printing Requirements

• Educate and Protect Your People 5 Easy Ways to Prevent Burns

• Check out our Portable DuraLabel Toro Max Industrial Label Printer

What's Arc Flash?

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 3 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 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 who acts.

Then there is the restricted approach bound.

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 boundaries as well.

Follow the link and receive your free copy of our Arc Flash Label Quick Reference Guide.