Interesting article as it supports what I was saying about inadequate testing being conducted on these class II plug in power supplies and chargers!
Although I suspect only doing a Hi-Pot (flash) test between the mains input and low voltage output connections would actually revel a problem. Some domestic PAT testers support this 3KV AC test but better to perform at DC to reduce damage caused by high leakage currents when using AC. The GMC Secutest SIII springs to mind as a unit that can perform the DC Hi-Pot tests and is a nice medical safety tester.
