WSD 2P: Does A WSD 2-Pole Require Power On Pole 1 To Function? Yes, a WSD 2-Pole must be wired to line power on Pole 1 to function. On 120/277 VAC versions, Pole 1 wires are black; on 347 VAC versions, Pole 1 wires are red. Have more questions? Submit a request 0 Comments Please sign in to leave a comment.