Wire Size For A 60 Amp Breaker ,.According To The NEC ??

[Sberry]

Doesnt say ALL, it lists the musts and the exemtions. Probably worth noting some of this does not apply to other recepts which must match all 3 parts. But,,,,,,,,,,,,,,, what the style of recept does 2 things, 1 it says it has X wire in it and also just as or more importantly is that it is a current limited circuit. AC unit was mentioned, its listinjgs are almost 2 individual things, 1,,, the circuit ampacity and second the reccomended breaker. That breaker must meet code but the code says follow the mfg listing. It does depend on method,, cord and cable may not even be legal, hence the flex whip with the wires in it.
I was in a trailer park a while back, the AC add ons were kind of interesting. I almost bet when this started they might have had a cord and plug but what the solution for them all was huge roll of 10 SO and a fist full of 30A breakers. They prolly figure,,, no miss.

 

[neilkingent]

Don’t care as much about the breaker in the air handler itself, those breakers are for protecting the wire in the AHU and have zero to do with protecting the wire feeding them from the panel.

Panel breaker is what matters. What is the breaker size feeding those wires?

If #10 is Hooked up to a 60A in your panel, that is bad news.



Generally AHUs with dual breakers are for splitting the stages of electric heat strips (either primary heat or secondary/emergency with a heat pump). The fan and controls in the unit are very low amperage. Heat strips can be low to high KW and should be indicated on outside of unit or inside a unit panel.

Bingo.