I'm a bit disappointed that others have not come forward with additional fittings to discuss. I'm sure there are others out there!

The illuminated closet rod would be a good choice- except that I personally made the proposal that got it into the NEC.

"Classified" circuit breakers are also another classic instance of a direct conflict with "listing and labeling." UL's contradictory statements regarding just which markings, exactly, constitute the part of the labeling to which the NEC applies are rather amusing. I can only say that my internal UL sources assure me that UL is really, really sorry they tried to be nice at one time and tried to throw Square D a bone.