Offhand, I don't know of any NEC requirement for the Class 2 conductors for the outside unit to be sunlight resistant if exposed, nor I am I aware of a requirement for a wet location listing. Can anyone post a code reference?
Would 310.8(D) "Locations exposed to direct sunlight" apply? 310.1 Scope doesn't seem to provide an exclusion for Class 2 or any other type of conductor, it seems to be all inclusive.
(NEC2005 reference)
