I know this may sound really ignorant to alot of you with this forum, but I would really appreciate some help understanding this.
I just replaced a 70 amp breaker that was melted in a load center. Under the breaker terminal were 6 awg thhn. This branch circuit is feeding a pool heat pump with a minimum circuit ampacity of 36 amperes, along with a 2 hp 230v 1 phase motor and a couple of 300 watt pool light transformers.
Know I did my calculations and replaced the 6 with 4 awg thhn for the branch circuit, replacing the melted 70 amp breaker on the same day.
Someone told me I shouldn't have done that and the wire and breaker were just fine.
I have looked up code references in articles 210, 220, 430 and 440. Am I going in the right direction? And if so, I would appreciate some other code references to back my up on my call since I am feeling confident I did the right thing.