# Explosion-proof (XP) — Certification marks and hazardous-area classifications: cross-market equivalences

For Explosion-proof (XP), stated equivalent is Ex d (Flameproof); meaning is Contain the explosion inside the enclosure; governing standard / law is IEC 60079-1, verified against its source on 2026-08-11.

- **Designation:** Explosion-proof (XP) _(verified: appears in the quote below)_
- **Stated equivalent:** Ex d (Flameproof) _(verified: appears in the quote below)_
- **Meaning:** Contain the explosion inside the enclosure _(verified: appears in the quote below)_
- **Governing standard / law:** IEC 60079-1 _(verified: appears in the quote below)_

## What the source says

> Explosion-proof (XP) | Ex d (Flameproof) | IEC 60079-1 | Contain the explosion inside the enclosure

## Source

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

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/).