Thanks, finally some satisfactory answers

AndLi skrev:They cant get only one phase, 230V is between two phases...

What I meant was of course 2 phases, so used to "single phase" for 3x400V+N systems.

My apologies for posting in English here. My command of Swedish is what one would call non-existent :) Can't find an equivalent Norwegian forum and international forums don't result in a satisfactory answer, so hopefully someone can help me with this: I understand that the mains supply system in Nor...