# Group B — North American vs IEC/ATEX explosion protection designations

For Group B, category is gas group; iec / atex designation is IIC; basis or note is Hydrogen, recorded from its source on 2026-08-06.

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

## What the source says

> Hydrogen | B | 520 | 968 | 6,000 PSI | IIC

## Source

- https://ldpi-inc.com/resources/classification-codes/class-1-locations/

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/).