# UL 514C — Which OSHA-recognized labs (NRTLs) can certify to a given test standard

For UL 514C, standard title is Nonmetallic Outlet Boxes, Flush-Device Boxes and Covers; nrtl is NSF; laboratory is NSF International; status is currently recognized, recorded from its source on 2026-08-10.

- **Test standard:** UL 514C _(verified: appears in the quote below)_
- **Standard title:** Nonmetallic Outlet Boxes, Flush-Device Boxes and Covers _(verified: appears in the quote below)_
- **NRTL:** NSF _(verified: appears in the quote below)_
- **Laboratory:** NSF International _(verified: appears in the quote below)_
- **Status:** currently recognized _(our reading, not quoted from the source)_

## What the source says

> UL 514C | Nonmetallic Outlet Boxes, Flush-Device Boxes and Covers |

## Source

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

Last verified: 2026-08-10. Review by: 2026-11-08.
Part of [Which OSHA-recognized labs (NRTLs) can certify to a given test standard](https://referencesource.org/nrtl-recognized-test-standards/).