# Class II — North American vs IEC/ATEX explosion protection designations

For Class II, category is area classification; iec / atex designation is Zone 20, 21, 22 (dust); basis or note is Combustible dust, recorded from its source on 2026-08-06.

- **Category:** area classification _(our reading, not quoted from the source)_
- **North American designation:** Class II _(verified: appears in the quote below)_
- **IEC / ATEX designation:** Zone 20, 21, 22 (dust)
- **Basis or note:** Combustible dust _(verified: appears in the quote below)_

## What the source says

> Class II | Combustible dust

## Source

- https://www.inframena.com/hazardous-area-classification-equivalency-guide/

Last verified: 2026-08-06. Review by: 2028-08-05.
Part of [North American vs IEC/ATEX explosion protection designations](https://referencesource.org/ex-classification-system-crosswalk/).