How does 3 phase power work?
In: Physics
You have four wires (typically). Three carry power, one is neutral/ground and doesn’t (normally) do anything. Each of the power wires is carrying the same AC frequency and voltage *but* out of phase…the “peaks” of power on the wires are 120 degrees out of phase. So over one “rotation”, one wavelength, of 360 degrees, each wire goes through it’s peak voltage in turn.
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