You got one thing right-you're not an electrician it sounds like. Overloading a 30-amp breaker will blow the shore breaker. DUH. Plug a 30-amp cord/connecter into a 50 amp dock supply and with an over-30 load, the 30 will melt and/or short out and eventually blow the SP 50 breaker. And maybe fire up.My new Jeanneau is set up just like Dr. D - two 30 amp circuits, with two 50 amp connectors in the cockpit. The boat came with custom cables that had 30 amp sockets shore side and 50 amp at the boat. ... - what if someone plugs in a 50 amp shore power cable? I'm not an electrician, but my understanding is that the circuit will only draw 30 amps, and the breaker will trip if a short or other cause creates a draw greater than 30 amps. I don't see the difference between that and plugging a 30 amp shore power cable into a 50 amp pedestal with an adapter. ....
Sailbaum or DD needs to gets some answers to some questions before jumping to complain.
1. What size is the cable of the cords in use. 10-3? Or 6-3?
2. What is the wiring inside the boat from input recepticle to AC main breaker panel?
3. What is the breaker rating of the master breaker that should be within 10 feet of the input recepticle?