European Standard · Electrical Safety
EN 61482 – Clothing Protection Against the Thermal Hazards of Electric Arc
EN 61482 is the European standard specifying test methods and requirements for clothing protecting against the thermal hazards of an electric arc, essential for electrical workers exposed to the risk of arc flash incidents during live or near-live electrical work.
1. Scope
EN 61482 covers two main test methods: EN 61482-1-1, an open arc test measuring the arc rating (ATPV or EBT) of a fabric, and EN 61482-1-2, a box test classifying garments into Class 1 or Class 2 based on protection against a defined arc energy in a controlled enclosure.
2. Exclusions & Related Standards
- Often combined with insulating gloves meeting EN 60903 for complete electrical worker protection.
- Built on the general protective clothing requirements of EN ISO 13688.
- Complements standard flame-resistant clothing under EN ISO 11612 where both general flame and specific arc flash hazards exist.
3. Key Requirements & Marking
Garments tested under the open arc method receive an arc rating expressed as ATPV (Arc Thermal Performance Value) or EBT (Energy Breakopen Threshold) in calories per square centimetre. Garments tested under the box test method are classified as Class 1 (lower arc energy) or Class 2 (higher arc energy) protection.
4. Testing Overview
Testing exposes fabric or garment samples to a controlled electric arc, either in an open arc configuration measuring the specific energy at which a defined probability of burn injury occurs, or in an enclosed box configuration measuring survival at fixed arc energy levels corresponding to Class 1 or Class 2.
5. Selection Guide
Select arc-rated clothing based on an incident energy analysis of the specific electrical task and equipment involved, ensuring the garment’s arc rating or class meets or exceeds the calculated incident energy exposure level for that task.
6. Inspection, Care and Maintenance
- Follow manufacturer washing instructions precisely, since incorrect laundering can degrade arc-rated fabric performance
- Inspect for contamination with flammable substances such as oil, which can compromise arc protection
- Replace garments once fabric is thin, torn or the flame/arc-resistant treatment has visibly degraded
- Never wear non-arc-rated garments over or under arc-rated clothing in a way that could interfere with its performance
7. Frequently Asked Questions
What does ATPV mean on arc flash clothing?
ATPV stands for Arc Thermal Performance Value, expressed in calories per square centimetre, indicating the arc energy level at which the fabric is expected to provide adequate protection against a second-degree burn.
What is the difference between Class 1 and Class 2 arc flash clothing?
Class 1 garments protect against lower arc energy levels, while Class 2 garments protect against higher arc energy levels, based on the box test method under EN 61482-1-2.
How do I know what arc rating I need?
An incident energy analysis should be performed for the specific electrical task and equipment, and clothing should be selected with an arc rating equal to or greater than the calculated incident energy.
Can arc-rated clothing also be flame-resistant for general use?
Many arc-rated garments are also flame-resistant, but always confirm the specific certifications since arc protection and general flame resistance are tested differently.
Does arc-rated clothing eliminate the need for insulating gloves?
No, arc-rated clothing protects against thermal burns from an arc flash but does not provide electrical insulation, so appropriately rated insulating gloves meeting EN 60903 are still required for shock protection.