Most of Norway has traditionally had a Y 230. but the center point has not been bonded to ground, so it has usually not been a neutral at all. New transformers for new buildings use the more common European system of 400/230V Y, quite similar to the US 480/277V system. It has been some regional differences, The Stavanger area used the 230/400 (Earlier 380/220) system, Arendal area used a grounded center on the 230y but no Neutral wire in the supply system.
