electrical ground

Hello, I wonder if any of you can help me figure this out. I have a water heater Quick BR 23 12 S (1200 W) in my Beneteau. It has suddenly started to make the mains circuit breaker in my boat trip. This happens every time the heater is turned on. I have tried diagnosing what the problem is. Is...

Hello, The diver who cleans the bottom of my 1984 Hunter 25.5 (with outboard motor) told me that there was corrosion starting on the keel bottom and suggested hanging a zinc anode to stop it. I bought the hanging type. Boat is in saltwater marina in Florida. Can anyone tell me where to clamp the...