I knew I was missing something important when as a mid-level electrical engineer, I used to wonder which voltage value I should be using in my calculations. Was it 110V, 115V, 117V, or 120V? Was it ...

And use phase 3 (ground) on the lower rail of the train. So that phase is safe to touch when you stand on the ground (as there is no voltagedifferential). That results in the phase 1 and 2 to have a ...