Wayne.B wrote:

Smaller boats without shore power
connectors usually carry an adapter which converts a 30 amp twist
lock
plug into a conventional 15 amp socket.

"Larry" wrote:

There's an interesting discussion that needs to be aired out.......
snip

Why?

You plug an "adaptor" into the 50A receptacle, then you plug a 50 ft,
12-2 with ground extension into the "adaptor", then plug in the hot
plate that you leave on the dock.

If you develop a short, the magnetic portion of the 50A c'bkr will
clear the fault.

If you develop an overload that is less than 50A, first something will
start to smell. then smoke, then burn.

No, the magnetic portion of the 50A c'bkr will NOT clear the fault,
but so what?

Pull the plug, let the faulty device cool down, then scrap.

No boat caught fire, no one got electrocuted.

If you are foolish enough to walk away from your boat, with an
electrical load connected and operating, you deserve what ever
happens.

SFWIW, NEC is concerned about the insulation on the conductors of the
distribution system which does not include temporary extension
cordage.

Lew