blackhorse6
New member
- Location
- Massachusetts
What is the difference between a product having a UL Mark and that of ETL/Semko. Is there a preference?
UL versus ETL
- Thread starter blackhorse6
- Start date
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bphgravity
Senior Member
- Location
- Florida
Re: UL versus ETL
I believe the preference is UL, however, it is up to the AHJ to determine if the material or equipment used meets a specific listing of their choice. See LISTED in Article 100 of the NEC.
I believe the preference is UL, however, it is up to the AHJ to determine if the material or equipment used meets a specific listing of their choice. See LISTED in Article 100 of the NEC.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: UL versus ETL
One way to desginate a testing lab would be would be NRTL-Nationally Recognized Laboratory. An NTRL such as ETL or CSA can test products to a UL standard. UL is the best known, they have the best technical information (White Book), but they are not the only testing lab. In washington state our electrical agency has a list of NRTL's stating who can test what.
One way to desginate a testing lab would be would be NRTL-Nationally Recognized Laboratory. An NTRL such as ETL or CSA can test products to a UL standard. UL is the best known, they have the best technical information (White Book), but they are not the only testing lab. In washington state our electrical agency has a list of NRTL's stating who can test what.
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