There is no question that the motor conductors produce heat just like any other current carrying conductor.
Originally Posted by kwired
That being said, it is my opinion that the code wording does not require that the motor circuit conductors be derated. If they would delete the list of articles at the end of the code section, then I would say that they have to be derated, but with the current wording, the code does not require derating. The other issue is the fact that the motor circuit conductors are already derated to 80% based on the rules in Article 430.
"It is the first responsibility of every citizen to question authority." B Franklin