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Arc Flash Calculator

Home / Resources / Electrical Design Calculators / Arc Flash Calculator

Arc Flash Calculator

Arc flash is an electric arc event where current flows through the air between phase conductors and thermal energy is dissipated which may cause serious injury or death.

Switchboards above 50 V AC or 120 V DC must be evaluated for arc flash and shock protection. 

For a comprehensive guide refer to our article Understanding Arc Flash Hazards.

This online arc flash calculator is based on IEEE Std. 1584-2018 and determines incident energy and arc flash boundaries based on arcing currents for safety labels and to define arc flash clothing.

Please enter the parameters below and press Calculate.

Select PPE Category

Body protection is required using arc flash rated clothing when the calculated incident energy at the body is capable of causing a second degree (curable) burn (1.2 cal/cm2 or above).

Based on the maximum calculated incident energy above (cal/cm2) select the appropriate PPE Category from the image below of reference [1].

For alternative PPE categories refer to reference [2].

Arc Flash PPE Categories - Arc Flash Calculator

Electrode configurations:

Arc Flash Study Electrode Configurations ELEK Software - Arc Flash Calculator

References:

[1]  Electrical Arc Flash Hazard Management Guideline-2019.

[2]  NFPA 70E-2021, Standard for Electrical Safety in the Workplace.

[3]  IEEE Std. 1584-2018, IEEE Guide for Performing Arc-Flash Hazard Calculations.

Related Resources:

understanding arc flash hazards - Arc Flash Calculator

Understanding Arc Flash Hazards

Arc flash is defined as an electric arc event where current flows through the air between phase conductors and thermal energy is dissipated as radiant, convective, and conductive heat.

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cable size calculater - Arc Flash Calculator

Cable Size Calculator

This calculator determines minimum cable size using the method described by the Australian Standard AS/NZS 3008.1.1 and uses the accurate voltage drop method.

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