Guide · Power and electrical safety
UL vs ETL vs CSA marks on aquarium equipment
What UL, ETL and CSA marks mean on a pump, timer or smart plug, why FCC and CE are not North American safety listings, and what Canada requires.
Short answer
UL, ETL and CSA marks all mean a recognized lab certified the product to a safety standard; for North American buyers, any of them on the exact model is what you are looking for. FCC is about radio interference, not shock or fire safety, and CE is a European conformity mark. Check that the mark is on the product itself, and look the model up with the certifier.
The marks that mean safety certification
| Mark | What it means |
|---|---|
| UL | Certified by UL. For aquarium gear the relevant standard is UL 1018, Electric Aquarium Equipment, which covers equipment used on or in indoor aquariums at 300 volts or less, such as heaters, pumps, filters and aerators.[1] |
| ETL | Intertek says the ETL Listed Mark shows a product was tested and certified by Intertek, an OSHA-recognized Nationally Recognized Testing Laboratory, to applicable safety standards, and that ETL-marked products meet the same safety requirements as other NRTL marks.[2][3] |
| CSA, cCSAus | Certified by CSA. A cCSAus mark covers both Canada and the US: Intermatic lists cCSAus for its TN311 timer, meaning CSA certification valid for both countries.[4] |
UL, ETL and CSA are different labs, not different safety levels. What matters is that the exact model carries one of them.
Marks that are not North American safety listings
- FCC. FCC equipment authorization makes sure radio-frequency devices meet FCC technical rules on interference and RF exposure before they are sold or imported in the US.[5] It is not an electrical shock or fire safety listing. A smart plug such as the Kasa EP25P4 lists both FCC and UL; the UL listing is the safety part.[6]
- CE. A CE marking declares conformity with EU rules. EHEIM's feeder manual, for example, says its symbol means the unit conforms to EU standards, and mentions no North American mark.[7]
- Component marks. Some marks recognize a part, not a finished product. Ontario's Electrical Safety Authority lists recognized approval marks separately from component marks that are not recognized on complete end-use products.[8]
How makers state their marks
The wording matters. Three examples from maker pages:
- Intermatic TN311: cCSAus, with no UL listing shown.[4] We describe it as CSA certified (cCSAus) per Intermatic, not as UL listed.
- Kasa EP25P4: TP-Link lists FCC and UL under certification, but gives no UL file number.[6]
- Tetra Whisper air pumps: Tetra's US page states that the Whisper line is UL listed.[9] That is a line-level statement with no file number or per-model listing, so check the label on the exact unit.
A brand-level list of marks on a company page, with no model named, tells you even less. The listing verification guide shows how to check a specific model.
Canada: a mark is expected
Health Canada tells consumers not to buy plug-in electrical products without a Canadian certification mark such as CSA, cUL or cETL, and says the mark must appear on the product, not just the packaging.[10] In British Columbia, the Electrical Safety Regulation requires electrical equipment to carry a mark or label from a certification agency accredited by the Standards Council of Canada, or an approved special-inspection label.[11] Other provinces have their own regulators.
Quick check before you plug it in
- Find a UL, ETL or CSA mark (for Canada, a Canadian version such as cUL, cETL or cCSAus) on the product's rating label.
- Ignore FCC and CE for this purpose; they answer different questions.
- Look the model up with the certifier if the mark is unclear or only shown in the listing.
- No mark on a mains device you plan to leave running near water: return it.
Next
Questions
Is ETL as good as UL?
Intertek says ETL-marked products meet the same safety requirements as other NRTL marks. Both show that a recognized lab certified the product to a safety standard; what matters is that the exact model is listed.[2]
Is CSA certification valid in the US?
A cCSAus mark covers both countries. Intermatic lists cCSAus for its TN311 timer, which means CSA certification valid for the US and Canada.[4]
Is the FCC logo a safety mark?
No. FCC equipment authorization covers radio-frequency rules such as interference and RF exposure; it is not an electrical shock or fire safety listing.[5]
Does a CE mark mean a product is safe for US outlets?
No. CE marks conformity with EU rules; EHEIM's manual, for example, says its symbol means the feeder conforms to EU standards. It is not a North American certification.[7]
Do Canadian provinces require a certification mark?
Health Canada advises buying plug-in products only with a Canadian mark such as CSA, cUL or cETL, and British Columbia's regulation requires electrical equipment to carry an accredited certification mark or approved inspection label.[10][11]
Is a UL logo on a listing enough?
No. Look for the mark on the product itself and look the model up with the certifier.[10]