2 Phases of a 3 Phase System

Smart $

Esteemed Member
Depends on your reference and rotation.

With positive rotation starting with A, we have A at 0 degrees, B at 180 degrees and C at 270 degrees.

So, C lags A by 270d and C lags B by 90d. Also, C leads A by 90d and C leads B by 270d.
Ummm.... the center tap is between terminals A and C under the NEC.