# UL 2683 · UL LLC — Which OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

For UL 2683 · UL LLC, laboratory is UL LLC; standard number is UL 2683; standard title is Electric Heating Systems for Floor and Ceiling Installation, verified against its source on 2026-09-17.

- **Laboratory:** UL LLC
- **Standard number:** UL 2683 _(verified: appears in the quote below)_
- **Standard title:** Electric Heating Systems for Floor and Ceiling Installation _(verified: appears in the quote below)_

## What the source says

> UL 2683 | Electric Heating Systems for Floor and Ceiling Installation |

## Source

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

Last verified: 2026-09-17. Review by: 2027-01-06.
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/).