My electric dryer is triping the common trip 30A breakers that feed it. Dryer runs for about 3-4 minutes and then the breaker trips. Investigation reveals that one of the breakers get hot then they trip. The breaker on the other leg stays cool, other than perhaps some heat transfered by conduction from it's mate.
They are SquareD Homeline breakers Type TIPO.
As only one leg gets hot, I suspect a loose connection or a defective breaker. If they both got hot I'd suspect the dryer itself.
I do not have a amp meter to check actual current draw. New tool needed?
I'm going to pick up a new breaker set on the way home today. First I'll check for a loose connection, if the connection is tight, I'll swap out the breaker.
Any thing I'm missing here?