What is Arc Flash?
An arc flash is a sudden, explosive release of electrical energy that can cause severe burns, hearing damage, and physical trauma. In EV workshops, arc flash risks exist whenever high-voltage systems are being serviced, tested, or commissioned.
PPE Categories Explained
Arc flash PPE is categorised by the cal/cm² (calories per square centimetre) of incident energy the garment can withstand:
CAT 1 (4 cal/cm²)
Minimum protection for low-energy arc flash risks. Includes arc-rated shirts and pants.
CAT 2 (8 cal/cm²)
Standard protection for most EV workshop applications. Includes arc-rated suits with face shields.
CAT 4 (40 cal/cm²)
Maximum protection for high-energy environments. Full arc flash suits with hoods and heavy-duty gloves.
Selecting the Right Category
The correct PPE category depends on:
- The voltage of the system being worked on
- The available fault current
- The clearing time of protective devices
- The working distance
Conclusion
Always consult a qualified electrical engineer to determine the appropriate arc flash PPE category for your specific workshop applications.
Need help applying this to your workshop?
Our technical team can provide personalised guidance based on your specific workshop setup and requirements.
Speak to our team