I have a customer with a 3hp well pump that is approx. 300' down. The control box with the capacitor is about 100 to 150' away from the well house. I get a call that the circuit breaker from the service panel has begun to trip on a regular basis (after quite a few years after install). He has run #10 copper uf feeder to the well house and down to the pump. The readings on the 3hp pump read OK at around 14.5a on 1 leg and around 16 on the other. 4.5 on the start leg. The contacts on the starter are worn and slightly burnt . I am wondering if the voltage drop on the line could be contributing to the wear on the contacter and the wear on the 30a breaker feeding this circuit . Any comments out there?