I have a 30AMP circuit in my garage for powering a oven that I am going to use for powdercoating some small parts. I just bought a welder from Home Depot (Lincoln Weld Pak 180) that requires 208/220v. The oven is an in-wall type with no plug, just 4 wires- red, black, white & green. The cable the electrician ran is also 4 wire, same colors. I want to put a plug on the oven instead of hard-wiring it like it is now and put a receptacle so that I can switch between the oven & welder when I want to. Is this possible?