In the US, there are two phases that is 120V each to neutral. If you connect it phase to phase, then you get 240V. In my country. It's illegal to use phase to neutral of 120V because we are promoting our local products which run at 240V only (to avoid buying stuff from US). Hence are only allowed to use phase to phase of 240V.
Now I just bought a 240V Ground Fault Circuit Interrupter. A normal line to neutral GFCI would have current flowing from line to neutral. But in my case, it's 2 phases without neutral. So can the GFCI still work?
How does the current flow in phase to phase connection versus phase to neutral? Are they the same?