Bob:
The switch, outlet, and tap devices of insulating material that are permitted to be used without boxes in exposed cable wiring and for rewiring in existing buildings where the cable is concealed, etc., it not referring to the product that is used in the 545, etc., areas.
I searched my image library, and could not find the tap devices mentioned, but I am positive that they are the type that we can still purchase that are usually made of brown plastic with the receptacles and or switch all in one enclosure sort of like an in line switch used in the cord on a table lamp.
I can see where the words can be misinterpreted.
Besides that rule was in the code long before the 545 stuff came about.
