---
title: ETL — ETL Listed mark (Intertek)
mark: ETL
obligation: Voluntary
scheme_type: Third-party certification
region: North America
issuer: Intertek, one of the OSHA-recognised NRTLs
source_url: "https://www.osha.gov/nationally-recognized-testing-laboratory-program/its"
verified_at: 2026-08-19
version: 1
canonical: "https://tsinghu.com/en/certifications/etl-listed"
publisher: Shenzhen Tsinghu Technology Co., Ltd. (agency, not a certification body)
license: CC-BY-4.0
---

# ETL · ETL Listed mark (Intertek)

A North American NRTL certification mark on equal footing with the UL mark, assessed against the same UL/ANSI/CSA standards. cETL covers Canada. The choice between them usually comes down to lead time, channel acceptance and existing relationships.

| | |
|---|---|
| Issued by | Intertek, one of the OSHA-recognised NRTLs |
| Assessment route | Third-party certification |
| How it is obtained | Test against the applicable UL/ANSI/CSA standard, pass factory inspection and accept quarterly follow-up inspections. |
| Marking rules | The mark must be shown with the control number and must not imply endorsement by the standards developer. |
| Validity and upkeep | Maintained through follow-up inspections; design or standard changes require re-assessment. |

## Accepted in

- [Canada](https://tsinghu.com/en/markets/ca)
- [United States](https://tsinghu.com/en/markets/us)

## Based on

- [UL 1973:2022](https://tsinghu.com/en/regulations/ul-1973)
- [UL 2743:2025](https://tsinghu.com/en/regulations/ul-2743)

## Applies to product lines

- [EVSE · EV charging equipment](https://tsinghu.com/en/products/evse)
- [LIB · Batteries & cells](https://tsinghu.com/en/products/lib)
- [PPS · Portable power stations](https://tsinghu.com/en/products/pps)