UL vs ETL: Which Certification Should Your Power Cord Carry?
Every North American buyer asks the same question when comparing power cord suppliers: “Is it UL listed?” — and the second question, increasingly, is “or is ETL fine?”
The short answer: for the US market, UL and ETL are legally equivalent. Both come from Nationally Recognized Testing Laboratories (NRTLs) accredited by OSHA. The longer answer — about how the marks differ in practice, what buyers actually check, and how it affects your sourcing decision — is what this guide covers.
What an NRTL mark actually means
Under US law, OSHA accredits testing labs as NRTLs. A product bearing an NRTL mark has been tested to the applicable safety standards (for power cords, primarily UL 817 / UL 62 for the cord, UL 498 for plugs) and is subject to ongoing factory follow-up inspections.
UL (Underwriters Laboratories) and ETL (Intertek) are both NRTLs. A UL Listed power cord and an ETL Listed power cord must meet the same technical standards. The difference is administrative — the certification body, its mark, and its service model — not the safety level.
| Aspect | UL | ETL (Intertek) |
|---|---|---|
| NRTL accreditation | Yes (OSHA) | Yes (OSHA) |
| Test standard | UL 817 / UL 62 / UL 498 | Same standards |
| Mark | UL Listed (circle-UL) | ETL Listed |
| Factory follow-up | Periodic unannounced inspections | Periodic unannounced inspections |
| Buyer recognition | Highest name recognition | Growing, widely accepted |
| Typical lead time | Well-established programs | Often faster program setup |
Why the confusion exists
Three reasons buyers treat them differently:
- Brand recognition. UL has been certifying since 1894 and its mark is the default expectation in many RFQs. Some procurement systems literally list “UL” as a requirement without realizing ETL is an equivalent NRTL mark.
- Retailer requirements. Most US retailers accept both UL and ETL marks, but a minority of buyers or channel partners specify one by name. When a customer writes “UL only,” it is usually a habit, not a technical requirement.
- Region perception. In Canada, the picture is similar — UL Canada and cETL are both accredited, and the mark carries a “c” prefix (cUL / cETL) for Canadian compliance.
What to check on a certificate — not just the mark
Whether you choose UL or ETL, verify these details on the supplier’s certificate before ordering:
- Applicant and factory listed: the certificate must name your supplier’s factory, not an unrelated shell company
- Standards and file numbers: for US power cords, the file should reference UL 817 (cord sets) or UL 62 (cords) / UL 498 (attachment plugs)
- Marking requirements: the exact label (wire marking, plug marking) the factory is authorized to apply
- Validity and follow-up status: certificates can be suspended — ask for a current copy and confirm the factory inspection program is active
Does UL or ETL matter for your customers?
- For retailers / mass merchants: both marks are accepted; check your specific buyer’s vendor manual
- For OEMs and industrial buyers: some spec sheets name UL by habit; you can often propose ETL equivalency, but confirm first
- For export beyond North America: neither mark replaces destination-country marks (VDE/ENEC for EU, UKCA for UK, PSE for Japan, KC for Korea, BIS for India). Treat UL/ETL as the North American piece of a multi-market certification matrix
How HENG-WELL handles US certification
HENG-WELL is a Shenzhen-based power cord manufacturer whose US-certified products carry UL recognition, backed by a portfolio of 160+ certifications across UL, CSA, VDE, ENEC, UKCA, SAA, PSE, KC and more. Our UL program includes active factory follow-up inspection, so every shipment ships with current, verifiable documentation.
If you are sourcing power cords for the US market, tell us your target connector (C13/C14/C19/C20 or NEMA), rating, and volume. We will confirm the certification file for your specific part, provide samples, and quote with full test documentation — and if your buyer asks “UL or ETL,” we can walk you through the equivalency with the certificates in hand.
Quick checklist for your US power cord order
- [ ] Confirm target mark: UL, ETL, or cUL/cETL for Canada
- [ ] Verify NRTL file number and standards (UL 817 / UL 62 / UL 498)
- [ ] Confirm factory and applicant match your supplier
- [ ] Check certificate validity and follow-up status
- [ ] Confirm plug type (NEMA 5-15P etc.) and connector (C13/C19)
- [ ] Ask about testing reports for the specific gauge and length
