Hello Carl, Some inspectors may not know the difference between Classified and Listed marks, and they may accept Classified equipment. However, you may run into problems in some jurisdictions without Listing for electrical products. The National Electrical Code says "Listed" and that is what some inspectors look for. Some NRTLs may not be willing to issue a classified mark where an appropriate UL standard exists. Others can correct me if I am wrong, but I believe that UL uses the Classified mark for products where a UL standard does not exist, yet UL has verified that the product meets the requirements of a non-UL standard. UL would not likely allow the use of their Classified mark to show that a product has been tested to only a portion of a UL standard.
An example is cable trays. UL will verify that cable trays meet the grounding and bonding requirements of the National Electrical Code. Classified cable trays<http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/showpage.html?&name=CYNW.GuideInfo&ccnshorttitle=Cable+Trays&objid=1074080954&cfgid=1073741824&version=versionless&parent_id=1073985303&sequence=1> are only tested to the NEC requirement and not a UL standard. Other NRTLs may use different terms for the same idea. If a product isn't Listed and an appropriate UL standard exists, the question will always arise of why the product doesn't comply with all the Listing requirements. I would recommend Listing where Listing standard exists. Ted Eckert Compliance Engineer Microsoft Corporation [email protected]<mailto:[email protected]> The opinions expressed are my own and do not necessarily reflect those of my employer. From: Carl Newton [mailto:[email protected]] Sent: Thursday, November 01, 2012 6:42 AM To: [email protected] Subject: Listing or Classification in the field? Group, I'm working with a company that manufactures high-end exercise equipment that is used in both therapeutic and general fitness applications. They want to consider NRTL Classification in lieu of Listing in order to reduce cost and complexity of compliance. My primary concern is acceptance of Classified devices by local inspectors in USA and Canada. Can any of you on the list speak to this question? I've not been able to get what I consider to be solid evidence from one NRTL that there won't be acceptance issues by local inspectors if the device is Classified. Thanks in advance, Carl - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
