# II 1D — Certification marks and hazardous-area classifications: cross-market equivalences

For II 1D, market / system is ATEX; stated equivalent is Da; applies to is Zone 20, 21 & 22, verified against its source on 2026-08-11.

- **Designation:** II 1D _(verified: appears in the quote below)_
- **Market / system:** ATEX _(verified: appears in the quote below)_
- **Stated equivalent:** Da _(verified: appears in the quote below)_
- **Applies to:** Zone 20, 21 & 22 _(verified: appears in the quote below)_

## What the source says

> fr, d, p, h Equipment Groups Zone 0 DUST Zones Equipment Group Defini on Suitable for Zone 20, 21 & 22 GAS Zones Group I Electrical equipment intended for use ATEX Group & Category: II 1D in mines suscep ble to fire damp IECEx Equipment Protec on Level: Da Electrical equipment intended for use in Types of protec on (electrical):

## Source

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

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Certification marks and hazardous-area classifications: cross-market equivalences](https://referencesource.org/certification-standards-equivalence/).