Terry,

Is it possible that your "220" installation boat is a 50Hz European
wiring setup? You might want to look into whether this boat is wired
expecting that type of input or the U.S. standard of 60Hz.

If so, there may be problems in doing what you describe, as the input is
a single phase 220 volt three wire system (hot, neutral, ground), where
as the 220 volt U.S. standard uses four wires, two hot and one neutral,
one ground.

There are other considerations as well such as the difference in Hertz
will also affect many different pieces of electronic equipment and motors.

Hope this helps.

Cheers,

Robb

Terry wrote:
I am in the process of getting a 220 boat. I am thinking that if it
takes it takes two phases to make 220 for boat wiring then I can run a
separate pair from the neutral and one phase and make that into 110 for
the boat. I can then install both 220 and 110 plugs on the vessel.
Would like to know if anybody can critique me on this as I am not 100
percent sure.