Rich, Can you test to determine the rating of a conductor, connector, contact, etc. within our application?
I once had a connector we wanted to use in a fairly high current application. The connector manufacture didn't specify a total current rating on the connector but a rating on a single connector pin. Then we had to de-rate for multiple pins and ambient temp and after all that calculating we were about an amp short of our fault current (49 amps calculated, 50 amp fault current). So we contacted the connector manufacturer and they said it would be ok. We ask how they determined that, and they told us they rate their connectors based on a 35ºC rise in temperature. So they suggested we test our application by running up the current to just before the OverCurrent Protection device trips, hold in that condition for up to 4 hours, and see what the temperature rise is. If it is 35ºC or less, it is ok. Is this the method used by wire companies as well? Is this a common test to use in those cases where the rating is unknown or difficult to calculate? Are there better test methods? Thanks for any replies. The Other Brian -----Original Message----- From: Richard Nute [mailto:[email protected]] Sent: Thursday, June 23, 2016 12:53 PM To: [email protected] Subject: Re: [PSES] insulated wires Insulated wires, like any other component, must be used within their ratings. Voltage, temperature, ampacity, etc. And, if the equipment is to be certified, the wire must be certified. These days, most wire is surface printed with its ratings and certifications. A typical PVC wire that is used in 60950 products is UL Style 1007 or 1028. One source of information about wire is: http://www.standard-wire.com/downloads/swc_catalog .pdf Rich > -----Original Message----- > From: Amund Westin [mailto:amund@WESTIN- EMISSION.NO] > Sent: Thursday, June 23, 2016 5:46 AM > To: [email protected] > Subject: [PSES] insulated wires > > Looking for requirements for single insulated wires (UL, > IEC, etc.) used > inside an IEC60950-1 product (230VAC). > Any tips where I should start looking? > > B.regards > Amund > - ---------------------------------------------------------------- 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]> ________________________________ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - ---------------------------------------------------------------- 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]>
