220 volts from two 110 volt extension cords ?
Is this a crazy idea?
The 220 volt service comes in on 3 wire, one natural and two hots . Connecting from either of the hots and the neutral will give you 110 volts and connecting to the two hots give you 220 volts.
To balance the load on the service feed, the breaker panel alternates between the two service hot leads while connecting 110 breaker. That means, if I take a extension cord and a volt meter, plug into one outlet, it should not be hard to find a second outlet feed off the other hot leg which would give me 220 volts. By plugging a second extension cord into that outlet and using an adapter that would only connect to the hot leg of each extension cord and their grounds and wiring them to a 220 socket I should get a 15 amp 220 volt outlet.
Is this a dangerous idea? I know no building electrical code would OK it, but as a temporary connection for a welder supply it would be nice.
What do you think?