Select configuration: Open configuration Box configuration
Enter maximum available fault current (kA):
Enter source voltage (kV):
Enter gap between conductors (mm):
Is system grounded? Grounded Ungrounded or HR Grounded
Enter operating time of protective device (seconds):
Enter working distance from energized equipment (mm):
Select enclosure type: Open Air Switchgear MCC and Panels Cable
Calculate Reset

Configuration - Select either a box (in switchgear or enclosure) or open-air configuration.

Maximum Available Fault Current - Enter the maximum bolted-fault current that the source can supply the circuit.

Source Voltage - Enter the source voltage. This calculator is designed for arc flash calculations for voltages under 15 kV.

Gap Between Conductors - Typical range for gap between current-carrying conductors is 13 - 152 mm.

Conductor - Choose the material used as a conductor in the wire. Common conductors are copper and aluminum.

System Grounding - Select system grounding method (either grounded or ungrounded/high-resistance grounded).

Protective Device Operating Time - Enter the maximum operating time of the upstream protective device in seconds.

Working Distance - Enter the working distance from energized equipment in mm.

Enclosure Type - Enter the enclosure type in which incident energy is calculated.

Note: This gives a simple representation of what's involved in arc flash calculations. Always consult with an engineer before doing more complex arc flash calculations. Reference the tables below for help with input values to this calculator.

Source: IEEE 1526-2002 Standard

Conditions for Which Calculator is Applicable

Parameter	Applicable Range
System Voltage (kV)	0.208 to 15 kV
Frequencies (Hz)	50 or 60 Hz
Maximum Fault Current (kA)	0.7 to 106 kA
Gap Between Conductors (mm)	13 to 152 mm
Equipment Enclosure Type	Open, Box, MCC, Panel, Switchgear, Enclosure
Grounding Type	Ungrounded, Grounded, High-Resistance Grounded
Phases	Three-Phase Faults