Hello James, I propose to check Annex A of the National Electrical Code NFPA 70 (NFPA 70®: National Electrical Code®<https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and-standards/detail?code=70>) that contains a list of product safety standards used for product listing where listing is required by the NEC. If the equipment in question is in the scope of a standard mentioned there, it requires listing (i.e. certification by a NRTL as defined in NEC article 110.3(C)).
Kind regards, Bernd Von: James Pawson (U3C) <ja...@unit3compliance.co.uk> Gesendet: Dienstag, 27. September 2022 09:20 An: EMC-PSTC@LISTSERV.IEEE.ORG Betreff: [PSES] To NRTL or not NRTL, that is the question Hello experts, I'm trying to understand what electrical products require NRTL approval for electrical safety for sale in the United States. Looking on the OSHA website I find this page (https://www.osha.gov/nationally-recognized-testing-laboratory-program/products-requiring-approval) which links to this page ( https://www.osha.gov/nationally-recognized-testing-laboratory-program/1910-references#1910_303-307) Taking this at face value, particularly 303(g)(2)(i), does this mean that equipment operating at less than 50V (I'm assuming DC and AC RMS) does not require NRTL approval? The question comes from a customer who was emailed by one of his US customers stating that he should have "UL listing". I understand that NRTL approval and the Listing process are different with the latter being more involved? Would appreciate any comments on this. Thanks as always. All the best James - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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