TheRFMan
Member
Huh. Which shows that you got an answer from someone who didn't understand or didn't know what they were talking about. You can use the exact same wire, whether it's 120V or 240V.
THIS. Wire is the same. Just need a new double-pole breaker and switch the white wire to the second pole rather than neutral. In most places, electrical code would require labelling at the panel and at the outlet junction box to indicate that the white wire is hot.