30 amp source with 50 amp system

[rwidman]

........... Moral of the story - always have a multi-meter when in doubt.

A multi meter is a bit like a violin. It's of little use unless you know how to use it.

To be specific, one not only has to know how to set the controls, one has to know where to place the probes and what the resulting readings mean.

I'm a bit surprised nobody markets a plug in tester for marina outlets similar to the ones available for 120 volt AC outlets found in homes and businesses. They cost about $10 and test for correct or incorrect wiring and many test the ground fault feature or GFCI outlets.

 

[RickB]

I'm a bit surprised nobody markets a plug in tester for marina outlets ...

They would probably cost a fortune and several varieties might be needed. Product liability would be high as well.

I think that checking for voltage and polarity at the panel before closing the boatside breaker might prevent many problems - if they even exist to any great extent.

 

[FF]

There are abundant 30A to 15A marine plugs that would work fine with a house wiring checker stuck in.

Most folks probably have one on board for the backwater marinas .