# Group D · gas group — North American vs IEC/ATEX explosion protection designations

For Group D, category is gas group; basis or note is Methane (mining), recorded from its source on 2026-10-06.

- **Category:** gas group _(our reading, not quoted from the source)_
- **North American designation:** Group D _(verified: appears in the quote below)_
- **Basis or note:** Methane (mining) _(verified: appears in the quote below)_

## What the source says

> Methane (mining) Group D

## Related records

- [Class I, Group A · gas group · IIC](https://referencesource.org/ex-classification-system-crosswalk/iic-gas-group-class-i-group-a/)
- [Class I, Group B · gas group · IIB + H2](https://referencesource.org/ex-classification-system-crosswalk/iib-h2-gas-group-class-i-group-b/)
- [Class I, Group C · gas group · IIB](https://referencesource.org/ex-classification-system-crosswalk/iib-gas-group-class-i-group-c/)
- [Class I, Group D · gas group · IIA](https://referencesource.org/ex-classification-system-crosswalk/iia-gas-group-class-i-group-d/)
- [Group A · gas group · IIC](https://referencesource.org/ex-classification-system-crosswalk/iic-gas-group-group-a/)
- [Group B · gas group · IIC](https://referencesource.org/ex-classification-system-crosswalk/iic-gas-group-group-b/)
- [Group B · gas group · IIC (partially IIB+H₂)](https://referencesource.org/ex-classification-system-crosswalk/iic-partially-iib-h-gas-group-group-b/)
- [Group C · gas group · IIB](https://referencesource.org/ex-classification-system-crosswalk/iib-gas-group-group-c/)
- [Group D · gas group · IIA](https://referencesource.org/ex-classification-system-crosswalk/iia-gas-group-group-d/)

## Source

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

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/).