Installed a 3/4 hp. Sta-rite pump into creek for watering yard I used 475ft of 12/2 wire, my question what size fuse should I use and what can I do to make sure if a wire breaks on the pump in the water that it will throw the breaker. Is there something that can be recommended that would be a safeguard against anyone being shocked if a wire would happen to break in the water. Any help would be appreciated