IEC 60950-1 takes this construction into account. Table 3B including note "b" allows 0.75 mm2 cable with a 10 A IEC 60320 connector of the C13, C15 or C17 type as long as the length of the cord does not exceed 2 meters. The assumption is that the shorter length of cable would keep the resistance low enough to acceptably reduce the risk of overheating. IEC 60950-1 allows that cable to be used up to 10 A even in normal use. Based on this, it may be reasonable to state that a cable with this construction is safe under foreseeable misuse on non-ITE products.
I am unaware of a similar allowance in IEC 60065 where Table 18 requires 1 mm2 cable for use with 10 A connectors. Ted Eckert Compliance Engineer Microsoft Corporation ted.eck...@microsoft.com The opinions expressed are my own and do not necessarily reflect those of my employer. -----Original Message----- From: Doug Powell [mailto:doug...@gmail.com] Sent: Friday, October 17, 2014 10:06 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Misuse mains cordset In recent years many standards have been adding risk assessment to their requirements. A part of this is all about foreseeable misuse. That said I do not feel it is appropriate for a manufacturer to "police" every action if the end user. You best bet may be to mitigate by saying something along the lines of "not for use for any other purpose..." Thanks, - doug Douglas Powell http://www.linkedin.com/in/dougp01 Original Message From: Scott Xe Sent: Friday, October 17, 2014 9:51 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Reply To: Scott Xe Subject: [PSES] Misuse mains cordset We have an audio product that comes with an external power supply. The external power supply uses a detachable cordset. The cordset consists of a 2-pin 16A European Schuko plug, a cable of 0.75mm2 wires and a 10A kettle connector. This cordset is capable of delivering 6A current according to the cable in use. The unit consumes about 1A only. There is a concern of cable overheating if the user uses this cordset for other purpose according to the marking of the Schuko plug. Referring to other similar cordsets, this issue almost happens on most of cordsets. It seems there is no requirement in the current safety requirement looking after of it. Is it unduly worried? 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 <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> - ---------------------------------------------------------------- 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> - ---------------------------------------------------------------- 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>
