It was *not* properly groundedIt was grounded. None of the items we are talking about are UL listed.
Using the fit between the chassis and the outside of the IEC receptacle is NOT properly grounded. This will be subject to the resistance from the paint finish and the tightness variable from component size and machining tolerances. There was no wired connection between the IEC earth connection and the chassis. The manufacturer has now changed his previous practice and is fitting this missing cable which tells us all we need to know.
Whats worrying is that it wasnt obvious to the manufacturers that this earth cable was necessary. Considering how litigious the US is, said manufacturer should be very grateful this safety problem was pointed out.
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