The service disconnect for our air handler has two 60A time-delay fuses. The fuse contacts (where the fuses plug into the disconnect) are oxidized. This is causing fuse failure. Two questions:
1. What is the best way to clean the oxidation off the contacts? A wire brush didn't do much good.
2. P=I^2xR. So as the resistance across the fuse increases because of the oxidation the heat is increasing across the fuse leading to premature fuse failure. Am I understanding this correctly?
1. What is the best way to clean the oxidation off the contacts? A wire brush didn't do much good.
2. P=I^2xR. So as the resistance across the fuse increases because of the oxidation the heat is increasing across the fuse leading to premature fuse failure. Am I understanding this correctly?