Arc flash incidents pose serious risks to worker safety. This OSHA fact sheet explains what an arc flash is, why it’s dangerous, and how to stay protected by establishing safe approach boundaries around energized electrical equipment.

What’s covered on the poster

• What is an Arc Flash? A clear explanation of arc flash hazards, including extreme temperatures and common injury mechanisms.
• Approach Boundaries (NFPA 70E guidance):
  • Restricted Approach Boundary (highest shock risk)
  • Limited Approach Boundary (shock hazard exists)
  • Arc Flash Boundary (burn hazard without proper PPE)
• Workers’ Rights: Key OSHA worker protections and how to report hazards without retaliation.
• Contact OSHA: Web and phone resources for help and reporting.

Features

• Poster size 11” x 17”
• Poster is available in English and Spanish
• Front and back sides are laminated
• Quality printing in full color
• Attorney Approved
• Recycled Paper
• Made in USA
• Poster content is guaranteed to be up-to-date