On Tue, 22 May 2007 02:54:15 +0000, Larry wrote:

We could unplug the dock end and drag it into the boat's power panel. The
ground pin on the dock plug is plainly marked. It's L shaped. Just use an
ohmmeter or even a continuity light that's battery powered to find the
right one.

I like that suggestion. The shore power cable is long enough to
easily reach to where I need to do the testing. Let's hope that
neutral and ground are not tied together somewhere.