I have a 220 volt outlet over my workbench and I would like to use it. It is large, like the one for a clothes dryer. I have a 110 volt welder needing 20 amps. I know there is an adapter out there for RVs that may be 110 volts and 15amps from the 220 volts supplied at campsites. My welder blows the breakers on the 15 amp 110 circuit which is also over my workbench. Who makes one of these adapters at 20 amps and where can I find one. Thanks. Cz