jpbr: Besides the number of conductors needed to hook it up properly we should also be told what the electrical requirements are on this oven so we can advise the size of the conductors needed and the rating of the circuit breaker needed to hook it up safely and properly. Just running wires to have 120/240v is not the right way to go unless you know the other specs needed.
Can you post a brand and model number of the oven.
Can you post a brand and model number of the oven.