Charlie,
Yes, they are appliances and their construction is covered by product standards not the NEC. I can understand the NEC rules that tells us how to supply power to these appliances, but not those that tell how to use or construct portable appliances. I guess I should say that the use and construction of non-permanently installed appliances should not be in the code. An example is the new rule requiring vending machine cords to have built-in GFCI protection. This rule has no business being in the NEC. It belongs in a product standard. The code seems to be expanding the rules in this area, and it is my opinion that such rules are not within the scope of the NEC. I think that the following rules in Article 422 (2002 NEC) are not within the scope statement shown in 90.2 and should be removed from the NEC: 422.4, and 422.40 though 422.50. I’m not sure how you can apply 422.10 and .11 to portable appliances that are not present at the time of design or inspection.
Don
