# UL 879 — Which OSHA-recognized labs (NRTLs) can certify to a given test standard

For UL 879, standard title is Electrode Receptacles for Gas-Tube Signs; nrtl is CSA; laboratory is CSA Group Testing and Certification Inc; status is currently recognized, recorded from its source on 2026-08-10.

- **Test standard:** UL 879 _(verified: appears in the quote below)_
- **Standard title:** Electrode Receptacles for Gas-Tube Signs _(verified: appears in the quote below)_
- **NRTL:** CSA _(verified: appears in the quote below)_
- **Laboratory:** CSA Group Testing and Certification Inc. _(verified: appears in the quote below)_
- **Status:** currently recognized _(our reading, not quoted from the source)_

## What the source says

> UL 879 | Electrode Receptacles for Gas-Tube Signs |

## Source

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

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/).