# Division 2 — North American vs IEC/ATEX explosion protection designations

For Division 2, category is area classification; iec / atex designation is Zone 2; basis or note is Explosive atmosphere not likely; only abnormal conditions (<10 hrs/yr), recorded from its source on 2026-08-06.

- **Category:** area classification _(our reading, not quoted from the source)_
- **North American designation:** Division 2 _(verified: appears in the quote below)_
- **IEC / ATEX designation:** Zone 2 _(verified: appears in the quote below)_
- **Basis or note:** Explosive atmosphere not likely; only abnormal conditions (<10 hrs/yr) _(verified: appears in the quote below)_

## What the source says

> Division 2 | Zone 2 | Explosive atmosphere not likely; only abnormal conditions (<10 hrs/yr)

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Basis or note

exknowledge.com says basis or note is **Explosive atmosphere not likely; only abnormal conditions (<10 hrs/yr)**, as of 2026-08-06.

> Division 2 | Zone 2 | Explosive atmosphere not likely; only abnormal conditions (<10 hrs/yr)

Source: https://exknowledge.com/pages/nec-500-vs-atex-iec.html

inframena.com says basis or note is **Hazard present only under abnormal conditions**, as of 2026-08-06.

> Division 2 | Hazard present only under abnormal conditions

Source: https://www.inframena.com/hazardous-area-classification-equivalency-guide/


## Source

- https://exknowledge.com/pages/nec-500-vs-atex-iec.html
- https://www.inframena.com/hazardous-area-classification-equivalency-guide/

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/).