# UL 514D — Which OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

For UL 514D, laboratory is NSF International; standard title is Cover Plates for Flush-Mounted Wiring Devices, verified against its source on 2026-08-10.

- **Laboratory:** NSF International _(verified: appears in the quote below)_
- **Standard number:** UL 514D _(verified: appears in the quote below)_
- **Standard title:** Cover Plates for Flush-Mounted Wiring Devices _(verified: appears in the quote below)_

## What the source says

> UL 514D | Cover Plates for Flush-Mounted Wiring Devices |

## Source

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

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/).