There are two test methods for Arc Flash protective clothing:
- IEC61482-1-2 Commonly known as the ‘Box Test’
- IEC61482-1-1: Commonly known as the ‘Open Arc Test’
The Box Test method gives a protective classification of either Class 1, 4KA (lower level of protection) or Class 2, 7KA (higher level of protection). This has traditionally been the popular and most recognised standard in Europe, and a default choice for certification for HAZTEC® garments.
The Open Arc test method gives an Arc Thermal Protective Value (ATPV) rating or an Energy Break Open Threshold (EBT50) rating. This is becoming increasingly popular as garment combinations certified to this method can give figures that are more relevant in risk assessments or arc flash calculations.
For workwear within the HAZTEC® product range, a single layer garment that is sold with an Arc certification is commonly certified to Class 1 on the Box Test method.