Safety
Arc-Flash Awareness for Panel Work
Recognize arc-flash boundaries and confirm safe work practices before opening panels.
9 min Alex Kim Reviewed by Rachel Kim, CHST, CSP v1.2 · reviewed 2026-05-30
The Problem
Workers open energized panels without proper PPE, resulting in severe burn injuries.
Root Causes
- Assumption that de-energization has been confirmed by lockout/tagout
- Missing arc-flash label on the panel
- Wrong PPE selected for the incident-energy category
Correct Procedure
- 1Confirm de-energization via lockout/tagout and verified test
- 2Review the arc-flash label — note category, boundary and PPE
- 3Don appropriate arc-rated PPE for the category
- 4Establish and enforce the flash-protection boundary
- 5Have a qualified observer for high-risk work
Discussion Questions
Use these to engage the crew and connect the lesson to today's site conditions.
- 1How do we verify de-energization on this panel?
- 2What is the incident-energy category shown on today's label?
Sources & Review
Author: Alex Kim (20+ yrs) · Reviewed by Rachel Kim, CHST, CSP.
Published 2024-02-18 · Last technical review 2026-05-30 · Version 1.2 · Languages: EN, ES
AI at QST only summarizes expert-approved content and never invents safety requirements.
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