Arc flash and PPE standards explained

The test method that produces the ATPV, ELIM or EBT value, in cal/cm², shown on an arc rated garment. Compare the figure with the incident energy from your risk assessment.

A garment is tested against a constrained arc at 4 kA (APC 1) or 7 kA (APC 2). The result is pass or fail, recorded alongside the cal/cm² rating.

Protective clothing against heat and flame. The label lists code letters and levels: A1/A2 limited flame spread, B convective heat, C radiant heat, D molten aluminium splash, E molten iron splash and F contact heat. Not every garment carries every code, so match the codes to your hazards.

Protective clothing for welding and allied processes. Class 1 and Class 2 relate to the level of hazard the garment is intended for, with Class 2 covering the higher-hazard situations.

Covers the electrostatic properties of protective clothing. Garments built to it are designed to dissipate static charge. It matters in classified explosive atmospheres, and performance can degrade with washing and wear.

The primary international standard for high-visibility workwear, with three performance classes. Class 3 is the highest. Classification depends on the area of fluorescent material and the amount and placement of retroreflective tape, not just on tape being present.

Visibility clothing for medium-risk or low-light situations, where full EN ISO 20471 certification may not be required. It was introduced to reduce confusion about what visibility performance a garment actually provides.

Protective clothing offering limited protection against liquid chemicals: occasional, low-volume splashes or sprays. Type 6 covers full garments and PB [6] covers partial body protection such as a jacket or trousers.

Covers protection against rain. Garments are classified for water penetration and for water vapour resistance (breathability), and the two classes are shown as a pair on the label, for example 4:3.

The standard for industrial safety helmets. It includes an optional low-temperature requirement; Vailos arc flash helmets carry a −30°C shell classification.

The rail industry standard for orange high-visibility clothing for people working on or near the UK railway. Check the current issue and your rail operator's requirements.