# UL 2524 — Which OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

For UL 2524, laboratory is SGS North America, Inc; standard title is In-Building 2-Way Emergency Radio Communication Enhancement Systems, verified against its source on 2026-08-10.

- **Laboratory:** SGS North America, Inc. _(verified: appears in the quote below)_
- **Standard number:** UL 2524 _(verified: appears in the quote below)_
- **Standard title:** In-Building 2-Way Emergency Radio Communication Enhancement Systems _(verified: appears in the quote below)_

## What the source says

> UL 2524 | In-Building 2-Way Emergency Radio Communication Enhancement Systems |

## Source

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

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/).