Arc Flash Standards

Standard: IEC 61482-2

IEC 61482-2 is the overall standard covering protective clothing against thermal arc hazards of an electric arc. This standard also covers various aspects of the garment design. Garments complying with all of these requirements should be marked with the IEC 61482-2 symbol as well as the level of protection it meets.




IEC 61482




1. Open Arc Test Method (IEC 61482-1-1)

IEC 61482-1-1 is the Open Arc Test Method. It determines the ATPV level (Arc Thermal Protection Value) of the garment. The basic principle is that the Garment ATPV must be higher than the Arc Flash energy level as calculated. The Arc Rating is expressed in cal/cm2 (or small calories of heat energy per square centimetre).

2. Box Test Method (IEC 61482-1-2)

IEC 61482-1-2 is the Box Test Method. It determines the Class Rating of the garment. Class 1 – 4kA. Class 2 – 7kA.

It is important to ensure that all garments are fully tested and comply with all the requirements of IEC 61482-2. Test certificates for all of our garments are available on request.


Hazard Risk CategoryRequired Minimum Arc Rating for PPE
ARC1>= 4
ARC2>= 8
ARC3>= 25
ARC4>= 40


Standard: IEEE1584

The IEEE 1584 Standard was developed to help to protect personnel against Arc Flash Hazard Dangers. Once calculated, the predicted incident energy and arc current are used in determining and selecting appropriate overcurrent protective devices and PPE. The incident energy, category of PPE, flash protection boundary aswell as approach limits for shock protection can all become part of the detailed arc flash label.