Arc Flash Resource Center

Arc Flash Calculator

Use this convenient tool to view a sampling of arc flash hazard calculations and the impact of various system changes on arc flash energy levels and personal protective equipment (PPE) requirements.

Instructions

• Select the Equipment Type from the Drop Down Box.
• Drag slider bars to change values.
• Press the "Calculate Arc Flash" button. Results are displayed below.

Equipment Type  Switchgear Open Air Bus Conductor MCC Panel Switchboard NEMA E2 Contractor Int Switch VFD UPS ATS Other
Bolted Fault 10 kA	Clearing Time 1 sec [60 cycles]
Working Distance 18 inches	System Voltage 0.48 kV

* NOTE: This is a demonstration tool only and is not meant to be used to calculate arc flash values for personnel protection.

Results

Arc Boundary
119.8 inches

Incident Energy
19.6 cal/cm²

Clothing Class
#3 - Cotton underwear plus FR shirt and FR pants plus FR coverall

Stay Up-to-Date

Get the latest arc flash hazard resources from NFPA, IEEE, and ESA:

• NFPA 70E (PDF)
• IEEE-1584
• ESA Arc Flash FAQ (PDF)
• Performing an Arc Flash Hazard Assessment (PDF)
• Arc Flash Safety Bulletin (PDF)