When a three phase motor in running and you clamp an amp-meter around all three of the phase wires, you should expect to read zero because the magnetic fields cancel each other out.
I'm having trouble visualizing the process of fields canceling each other out in this scenario. It makes sense to me for two wires carrying AC current in opposite directions that are lying parallel to each other. But for three phases, I don't understand how all three fields are canceled.
Some insight into this would be appreciated!