On Sat, 08 Dec 2007 17:19:29 -0800, Peter Bennett
wrote:

More details would be useful. As it stands, your description doesn't
make sense to me, as the common North American 30 amp shore power
service _is_ 110 volts. Do you mean that the boat has a 30 amp power
inlet and shore power cord, but the dock only has a household-style 15
amp/110V outlet?

There is also the twenty amp outlet. The plug's blades are at ninety
degrees. Only such plugs I have ever seen were for window type air
conditioners. They make the outlets with the 'T' shaped holes to take
both those and the fifteen amp ones with the parallel blades.

Casady