renosteinke said: "What that means is that there is 240 between the 'ends' of the transformer, and only 120 between either end, and the center. This grounded center tap becomes the neutral.
Since the transformer is center tapped, the "120" from either half is exactly out of time with the 120 from the other half."
Reno:
The last thing you say in your explanation is the two Hot conductors are out of time. Do you mean out of phase? I think they are in phase. or do you mean they are vectoraly opposed? I would agree with that.
A scope across the 2 120 volts of a single phase transformer will show the voltage rise and fall in phase. both potentials are equal and in phase. The vector sums are opposite. An in balance load from center to A or center to B would add to zero in the same time.
The receptacle looks like a 14-50R with the x and y transposed as for a plug in the drawing.
It has never been allowed to use the neutral to bond an appliance here in Canuk land and many a US citizen has had to change the cord on their appliances when emigrating. I understand that in the project to harmonize electrical standards in North America that the US removed the ok to bond with the neutral and Canadians gave up the requirement for fuse protecting each element and the 120 volt outlets on ranges disappeared with it too.