# (no NEC equivalent) — North American vs IEC/ATEX explosion protection designations

For (no NEC equivalent), category is area classification; iec / atex designation is Zone 0; basis or note is Explosive atmosphere present continuously or for long periods, recorded from its source on 2026-08-06.

- **Category:** area classification _(our reading, not quoted from the source)_
- **North American designation:** (no NEC equivalent)
- **IEC / ATEX designation:** Zone 0 _(verified: appears in the quote below)_
- **Basis or note:** Explosive atmosphere present continuously or for long periods _(verified: appears in the quote below)_

## What the source says

> Zone 0 | Explosive atmosphere present continuously or for long periods

## Source

- 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/).