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

For Class I, category is area classification; iec / atex designation is Zone 0, 1, 2 (gas); basis or note is Flammable gases and vapors, recorded from its source on 2026-08-06.

- **Category:** area classification _(our reading, not quoted from the source)_
- **North American designation:** Class I _(verified: appears in the quote below)_
- **IEC / ATEX designation:** Zone 0, 1, 2 (gas)
- **Basis or note:** Flammable gases and vapors _(verified: appears in the quote below)_

## What the source says

> Class I | Flammable gases and vapors

## 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/).