TL;DR
An arc flash label is the orange-and-white warning sticker on electrical panels and switchgear stating the incident energy or PPE category, arc flash boundary, and shock hazard data a worker faces when operating or servicing the equipment energized. NFPA 70E requires the analysis behind it and periodic review, typically every five years or after system changes, while NEC 110.16 mandates at least a generic warning on commercial gear.
What it means
An arc flash label is the orange-and-white warning sticker on electrical panels and switchgear stating the incident energy or PPE category, arc flash boundary, and shock hazard data a worker faces when operating or servicing the equipment energized. NFPA 70E requires the analysis behind it and periodic review, typically every five years or after system changes, while NEC 110.16 mandates at least a generic warning on commercial gear. Values come from an engineering study of fault current and clearing times. Homeowners mostly meet them on commercial properties and large solar or battery installations rather than house panels.
Where it sits in the glossary
Arc flash label is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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