Chuck wrote:

You might do some **cautious** checking with a meter...

ZAAAP!

A good thing to carry with you is one of those adapter that lets you plug a
standard extension cord into the shore power. It's useful for those times
you want to use power tools without running power through the boat panel.
Buy one of those little 3 LED polarity and ground testers and stick it into
the adapter. You can then check the basic marina circuit before plugging
the boat in and not have any arguments with them whether it is your wiring
or theirs.

My tester lives in an outlet near the switch panel so I have a double check
of ground integrity as soon as the outlets come live. When plugged into AC.
it is also a night light.

--
Roger Long