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

For Class I, Group D, category is gas group; iec / atex designation is IIA; basis or note is Propane, recorded from its source on 2026-08-06.

- **Category:** gas group _(our reading, not quoted from the source)_
- **North American designation:** Class I, Group D _(verified: appears in the quote below)_
- **IEC / ATEX designation:** IIA _(verified: appears in the quote below)_
- **Basis or note:** Propane _(verified: appears in the quote below)_

## What the source says

> IIA | Propane | Class I, Group D |

## Source

- https://www.e2s.com/guide-for-hazardous-areas/gas-and-dust-groups

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/).