With what Keith is saying, looking at the "phaseconverter-usa" unit, L1= A, L2= B, L3= C. And follow the sequence Keith mentioned checking voltages. As Keith said L3 or C is the generated leg and that voltage is the "wild" leg as some call it. And make sure it doesn't get connected to any other circuit than T3 on the motor. And don't check it against a neutral or ground, it will not give you a constant reading of any value to you, and can be dangerous to you if not careful. Ken