# Group E · dust group — North American vs IEC/ATEX explosion protection designations

For Group E, category is dust group; basis or note is disputed: Combustible Metal Dusts per euroswitch.com, Metal dust per inframena.com, recorded from its source on 2026-10-06.

- **Category:** dust group _(our reading, not quoted from the source)_
- **North American designation:** Group E _(verified: appears in the quote below)_
- **Basis or note:** Combustible Metal Dusts _(per euroswitch.com; sources disagree — see below)_

## What the source says

> Combustible Metal Dusts Group E

## Sources disagree

More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from.

### Basis or note

euroswitch.com says basis or note is **Combustible Metal Dusts**, as of 2026-10-06.

> Combustible Metal Dusts Group E

Source: https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf

inframena.com says basis or note is **Metal dust**, as of 2026-10-06.

> E | Metal dust

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


## Related records

- [Class II, Group E · dust group · IIIC](https://referencesource.org/ex-classification-system-crosswalk/iiic-dust-group-class-ii-group-e/)
- [Class II, Group F · dust group · IIIB](https://referencesource.org/ex-classification-system-crosswalk/iiib-dust-group-class-ii-group-f/)
- [Class II, Group G · dust group](https://referencesource.org/ex-classification-system-crosswalk/dust-group-class-ii-group-g/)
- [Class III · dust group](https://referencesource.org/ex-classification-system-crosswalk/dust-group-class-iii/)
- [Class III · dust group · IIIA](https://referencesource.org/ex-classification-system-crosswalk/iiia-dust-group-class-iii/)
- [Group F · dust group](https://referencesource.org/ex-classification-system-crosswalk/dust-group-group-f/)
- [Group G · dust group](https://referencesource.org/ex-classification-system-crosswalk/dust-group-group-g/)

## Source

- https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf
- https://www.inframena.com/hazardous-area-classification-equivalency-guide/

Last verified: 2026-10-06. Review by: 2028-10-05.
Part of [North American vs IEC/ATEX explosion protection designations](https://referencesource.org/ex-classification-system-crosswalk/).