Most safety standards require both insulation and wire to be fastened to be acceptable
Back in the old days of tube TVs, the power switch was commonly on the back of the volume control. The switch terminals had holes through which the mains wire was threaded and then soldered. With energized aging, the switch terminals would heat and the solder would flow, and the wire would become “unsoldered.” If the wire was not wrapped around the terminal, it was free to touch other conductive parts of the TV, the closest of which were the audio circuits of the volume control. (Also, the TV would not always turn on.) Hence, wrapping of the wire around the terminal provided a second fixing (in addition to the solder) of the wire to its terminal. This morphed into two fixings for wires (all wires, not just mains). So, for crimp terminals, crimp the wire, then crimp the insulation and, voila, two fixings. Best regards, Rich - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
