Articles about 120 volt to 240 volt
Do I Need a New Circuit for an Air Conditioner? Air Conditioner Electrical Circuit Requirements, Replacing an Older Air Conditioner, Converting an Existing Circuit.
How to Convert the Electrical Circuit Voltage for a Motor: There are multiple problems here. You and the electrician did not discuss exactly what the 240 volt outlet would be used for. This is a big mistake, and I’m amazed that the electrician did not ask you what the circuit would be used for.