Matt Colie wrote in
:

3-Code requirement ends at the outlet.


Which is why your boat isn't covered, either...

That's how they get away with that chinzy plastic AC power panel in the
wooden box, or no box at all....instead of a proper fireproof electrical
panel to keep it from burning to the waterline.

DC power isn't covered, either.

Your boat is plugged into the dock, where the code ends.....