Based on the 2026 NEC.
Question: What four items are required on an arc flash hazard label?
See answer below.
Answer:
- Nominal System Voltage
- Arc flash boundary
- Available incident energy or minimum required level of personal protective equipment
- Date the assessment was completed
Reference: Section 110.16(A)
Explanation: The 2026 NEC now lists four items that must be provided on arc flash labels. They must also comply with the requirements of Sec. 110.21(B), which requires they be permanently affixed and not hand written.
Lupacchino is a senior design engineer with Gaylor Electric, Inc. in Noblesville, Ind. and serves as an alternate on NEC Code-Making Panel No. 3. He is currently licensed in more than 80 jurisdictions. He can be reached at [email protected]
About the Author
John Lupacchino
Senior Design Engineer
John began his career in electrical construction as an apprentice and worked his way through the trade. He is currently licensed in more than 80 jurisdictions. With more than 35 years of experience, he now plays a vital role in Gaylor Electric’s Engineering Department, where he serves as a senior design engineer. With a focus on design engineering, quality assurance, and code compliance, he has earned the highest level of respect from industry professionals alike. John currently serves as an alternate on NFPA 70 Code Making Panel No. 3. In addition, he enjoys sharing his electrical knowledge through education. As an Associated Builders and Contractors instructor, he continues to help grow a new generation of high-performing construction leaders.