# II 3G — Certification marks and hazardous-area classifications: cross-market equivalences

For II 3G, market / system is ATEX; stated equivalent is Gc; applies to is Zone 2 only, verified against its source on 2026-08-11.

- **Designation:** II 3G _(verified: appears in the quote below)_
- **Market / system:** ATEX _(verified: appears in the quote below)_
- **Stated equivalent:** Gc _(verified: appears in the quote below)_
- **Applies to:** Zone 2 only _(verified: appears in the quote below)_

## What the source says

> d, p, h Dust Groups that make up the dust Suitable for Zone 2 only IIIA Combus ble Fibres and Flyings ATEX Group & Category: II 3G IIIB Group IIIA dusts plus, Non-Conduc ve Dusts IECEx Equipment Protec on Level: Gc Zone 1 IIIC Group IIIA and IIIB dusts plus, Conduc ve Dusts 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/).