The breaker is getting hot and then tripping. There were some loose wires that were tightened but it is still tripping. The breaker is brand new. It is a main panel breaker on a utility vessel
Electrical Supplies - Your One Source - 100 Amp Main Breaker
Answers & Comments
Loose connection does cause heat, and the heat may have damaged the breaker. You must use an ammeter to check the amperage drawn on the circuit. If the amperage is well below the breaker rating, then replace the breaker