Sorry to resurrect an old posting but .....
I've tried to test a kettle recently that was less than a year old, Morphy Richards or some other brand that I can't remember (well known though) and they said it came from John Lewis'. It was Class I, three pins, no ClassII markings at all, but apart from the hot plate inside the kettle there is no exposed conductive material on them - they are plastic and I can't get any earth continuity anywhere, not even inside on the stainless steel plates (there are no elements exposed directly to the water). No leakage to earth, no touch current, insulation resistance good.
What do you do when you can't otherwise find any earth continuity due to surfaces being painted, non conductive, but is Class I construction. It must be fairly common isn't it?
Thanks for any comments. (Fluke 6200)