Assesment standard not specified. answer = No -> per UL508 and/or UL60950-1, film-coated wire is considered to be an uninsulated live part.
Can be considered 'Functional' insulation only where the particular standard or building code allows that construction, and the term has been defined. Brian -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Scott Xe Sent: Monday, October 22, 2012 10:01 AM To: [email protected] Subject: Enamel layer of windings in primary of mains transformer or AC motor Is the enamel layer of windings of mains transformer or motor considered as a basic insulation? Lots of people point out that the primary windings or motor windings are live part and requires double or reinforced insulation if the user accessible object could be touch the windings. If the enamel layer is considered a basic insulation, a supplementary insulation of the a user accessible object is required. Thanks and regards, Scott - ---------------------------------------------------------------- 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]>
