Hey guys, I have just been wondering about factory wiring on residential units. Seems like the wire sizes they use a lot of the time is under sized according to the charts and smaller than wiring feeding the unit. I am assuming factory wiring is approved to be as it is but many times it is located in an uninsulated and un-cooled section of the unit. How are they getting away with this? Is it because of how short the run they have is?
Also, I have been seeing some with aluminum factory wiring. Should Al to Cu connections have that aluminum wiring gunk on it? They seem to be going more to aluminum everything including all aluminum coils. Is our industry going to end up running aluminum linesets too?