How do I know which of the three phases the energy monitoring clamp should attach to?

Which phase do I put the clamp on?

Imbalanced phases are bad for motors. We assume that the 3 phases are drawing the same amount of current and calculate it accordingly. Just in case they are imbalanced, our system will use whichever phase is drawing the highest current, so that you get the sort case scenario picture of energy. If you know that one phase draws more current then we recommend clamping around that phase. Make sure to chose 3-phase in the settings for that machine.