Arc Flash Safety Labeling

What is Arc Flash?

An arc flash is a sudden release of electrical energy through the air caused by a fault between energized conductors or between a conductor and ground. It can produce extreme heat, intense light, pressure waves, and molten metal. About us

Why Arc Flash Labels Are Required

Electrical equipment likely to require examination, adjustment, servicing, or maintenance while energized must be field marked with a label containing arc flash hazard information.

Labels provide critical safety data needed before interacting with energized equipment.

Typical Information Found on an Arc Flash Label

• Equipment Name / Bus Identifier
• Nominal System Voltage
• Incident Energy (cal/cm²)
• Arc Flash Boundary
• Limited Approach Boundary
• Restricted Approach Boundary
• Working Distance
• Required PPE Category
• Date of Evaluation

Incident Energy

Incident energy is the amount of thermal energy impressed on a surface at a certain distance from the arc source. It determines the required level of personal protective equipment (PPE).

Approach Boundaries

Electrical safety standards define approach boundaries to protect personnel from shock hazards.

• Limited Approach Boundary – Distance from exposed energized parts where shock hazard exists.
• Restricted Approach Boundary – Closer boundary requiring specific PPE and training.

QR Code Integration

Modern arc flash labels may include QR codes that link to updated study data, single-line diagrams, and revision history to ensure technicians always access the most current hazard information.