# NFPA 496 — Which OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

For NFPA 496, laboratory is TUV Rheinland of North America, Inc; standard title is Purged and Pressurized Enclosures for Electrical Equipment, verified against its source on 2026-08-10.

- **Laboratory:** TUV Rheinland of North America, Inc. _(verified: appears in the quote below)_
- **Standard number:** NFPA 496 _(verified: appears in the quote below)_
- **Standard title:** Purged and Pressurized Enclosures for Electrical Equipment _(verified: appears in the quote below)_

## What the source says

> NFPA 496 | Purged and Pressurized Enclosures for Electrical Equipment |

## Source

- https://www.osha.gov/nationally-recognized-testing-laboratory-program/tuv

Last verified: 2026-08-10. Review by: 2026-12-08.
Part of [Which OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced](https://referencesource.org/nrtl-recognition-scopes/).