I downloaded the full report out of curiosity. Testing was done by Underwriters Laboratories on 400 samples of adapters that carried a counterfeit UL mark. Only 3 samples passed the electric strength test meaning an over 99% failure rate on that one test alone. The second most common failure was on the touch current test. To say “most” failed the test is an understatement. I don’t know the sampling method UL used, so I don’t know if the 400 samples were from 400 different vendors or if there were multiple samples of the same type of adapter. However, the information in the report not very encouraging for those combatting counterfeit goods.
This may become an interesting issue as USB-C power supplies become more common. We have already seen USB=C devices that can cause equipment damage<http://arstechnica.com/gadgets/2016/02/google-engineer-finds-usb-type-c-cable-thats-so-bad-it-fried-his-chromebook-pixel/>. We will also see a lot of people looking for additional adapters. A good quick-charge adapter that follows USB-C protocols and meets the applicable safety requirements won’t be inexpensive. Budget-minded consumers may be tempted to buy a cheap adapter and hope that it works right. Ted Eckert The opinions expressed are my own and do not necessarily reflect those of my employer. From: john Allen [mailto:[email protected]] Sent: Saturday, December 3, 2016 12:56 PM To: [email protected] Subject: Re: [PSES] British question, about a BS1363 plug-in power supply Evening A few weeks ago I went to a UK Electrical Safety First (ESF) Seminar, and, IIRC, this subject was covered in a presentation where it was said that the main point of failure was the Primary-to-Secondary insulation – most did not even meet the dielectric strength requirements for Basic Insulation ☹. John E Allen W. London, UK From: Richard Nute [mailto:[email protected]] Sent: 03 December 2016 20:10 To: [email protected]<mailto:[email protected]> Subject: Re: [PSES] British question, about a BS1363 plug-in power supply https://www.tradingstandards.uk/news-policy/news-room/2016/warning-over-fake-chargers-and-second-hand-electrics I wonder what the basic safety test was that failed in these chargers? 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 <[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]<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]>
