The acceptance of any unlisted electrical component, regardless of voltage, is up to the local electrical inspector. In practice, many inspectors won't accept line-voltage products unless they are listed. It is common for low-voltage products to be overlooked. However, you will likely find more variability in acceptance of low-voltage lighting products attached to building structure. If your local inspector is reasonable (and this too has a lot of variability) you may be able to work with your inspector to have them accept your selected 24V components. More often than not, I've had local inspectors ignore these types of low voltage products.
That being said, I had one inspector reject an empty 19" equipment rack because it didn't have a UL mark. The inspector asked specifically for UL approval. This was before UL had category NWIN<http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/showpage.html?&name=NWIN.GuideInfo&ccnshorttitle=Audio/Video,+Information+and+Communication+Technology+Equipment+Cabinet,+Enclosure+and+Rack+Systems&objid=1075704654&cfgid=1073741824&version=versionless&parent_id=1075704653&sequence=1> and Listing on empty racks was not common. There was quite a bit of discussion about the necessity of Listing pieces of sheet metal bolted together and bonded to building ground, but I couldn't convince the inspector to accept the rack. I wasn't sure what standard would apply to an empty rack, and I asked the inspector how he wanted it listed. He indicated that he didn't care what standard it was tested to as long as it got the UL mark. This is a case where Listing was required on a zero-volt product. 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: Bob LaFrance [mailto:[email protected]] Sent: Friday, September 11, 2015 7:54 AM To: [email protected] Subject: [PSES] Class II power supply and lighting. Greetings. I am putting in some low voltage lighting in my off-grid home. This is in addition to the usual 120vac lighting. I am having problems locating fixtures that are specific to 24v that are listed. Do I need to use listed components when wiring residential? Is that a call that building inspector will make? Regards, Bob LaFrance N9NEO Design Engineer Creare Inc. 16 Great Hollow Road Hanover, NH 603-640-2539 - ---------------------------------------------------------------- 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://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.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://www.ieee-pses.org/list.html (including how to unsubscribe) 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]>
