In the typhoon shelter here. The vessels have mooring
barrel at the bow and stern to secure the vessels in a tidy row.
Some vessel owners have a power cable (and water) laid on the shelter floor from the shore shipyards (60 amp 230v 50Hz) to a pontoon chained to the bow mooring
A mate of mine is at such a mooring, and in the pontoon next to him has the AC box at the pontoon. The box has two 30amp breakers. He is able to hook up to one of the 30amp with his neighbour.
The vessel that shares the pontoon power with him is under an interior refit
When AC circuit would be tripped for some reason at the neighbors vessel, the breaker at the shore will trip, not the breaker inside the vessel or pontoon AC panel.
I inspected the pontoon AC panel. The ground and the neutral are not bonded. The ground and neutral in my mates vessel are not bonded. I was unable to get into the panel at the shore to see if the ground and neutral are bonded.
I may be mistaken, but if the ground and neutral are bonded at the shore. The breakers should trip inside the vessel or pontoon AC panel.
Your feedback is well appreciated !!