# Type X · protection concept · US · Class I — North American vs IEC/ATEX explosion protection designations

For Type X, category is protection concept; country is US; hazard class is Class I; iec standard is NFPA 496 (FM 3620); division or zone is Division 1, recorded from its source on 2026-10-06.

- **Category:** protection concept _(our reading, not quoted from the source)_
- **North American designation:** Type X _(verified: appears in the quote below)_
- **IEC standard:** NFPA 496 (FM 3620) _(verified: appears in the quote below)_
- **Country:** US _(verified: appears in the quote below)_
- **Hazard class:** Class I _(verified: appears in the quote below)_
- **Division or zone:** Division 1 _(verified: appears in the quote below)_

## What the source says

> Type X US Class I Division 1 NFPA 496 (FM 3620)

## Related records

- [AEx d · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-d/)
- [AEx e · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-e/)
- [AEx ia · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-ia/)
- [AEx iaD · protection concept · US](https://referencesource.org/ex-classification-system-crosswalk/us-protection-concept-aex-iad/)
- [AEx ib · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-ib/)
- [AEx ibD · protection concept · US](https://referencesource.org/ex-classification-system-crosswalk/us-protection-concept-aex-ibd/)
- [AEx m · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-m/)
- [AEx ma · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-ma/)
- [AEx maD · protection concept](https://referencesource.org/ex-classification-system-crosswalk/protection-concept-aex-mad/)
- [AEx mb · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-mb/)
- [AEx mbD · protection concept · US](https://referencesource.org/ex-classification-system-crosswalk/us-protection-concept-aex-mbd/)
- [AEx nA · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-na/)
- [AEx nC · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-nc/)
- [AEx nR · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-nr/)
- [AEx o · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-o/)
- [AEx pD · protection concept · US](https://referencesource.org/ex-classification-system-crosswalk/us-protection-concept-aex-pd/)
- [AEx px · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-px/)
- [AEx py · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-py/)
- [AEx pz · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-pz/)
- [AEx q · protection concept · US · Class I](https://referencesource.org/ex-classification-system-crosswalk/class-i-us-protection-concept-aex-q/)

48 more in the full dataset at https://referencesource.org/ex-classification-system-crosswalk/.

## 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/).