These tables Hazard Risk Category, PPE requirements, and Flash Protection Boundaries based on arc flash incident energy levels. Reference the 2015 NFPA 70E¢ç: Standard for Electrical Safety in the Workplace¢ç for a more complete reference for Arc Flash Hazard calculations and safety.
|Hazard Risk Category||Typical Protective Equipment||Incident Energy (Cal/cm^2)|
|0||Nonmelting, non-flammable material||1.2|
|1||Fire resistant (FR) pant and shirt, or FR coverall||4|
|2||Cotton underwear plus FR shirt and FR pants||8|
|3||Cotton underwear plus FR shirt, FR pants with FR coveralls||25|
|4||Cotton underwear plus FR shirt, FR pants, and multi-layered flash suit||40|
|Arc Location||System Voltage||Flash Protection Boundary (feet)|
|Arc in Air||200 - 1,000 Volts||4|
|Arc in Enclosure||200 - 1,000 Volts||10|
|Arc in Enclosure||Over 1,000 Volts||20|
To calculate arc flash incident energy levels and Flash Protection Boundaries for your system, visit Arc Flash Calculator.