What is the difference between R phase, Y phase, B phase?

Question

Accepted Answer

R, Y, B phases are the three phases of AC power supply. They differ in their phase angle and voltage level.

R phase has a phase angle of 0 degrees and is usually connected to the red wire.
Y phase has a phase angle of 120 degrees and is usually connected to the yellow wire.
B phase has a phase angle of 240 degrees and is usually connected to the blue wire.
The voltage level of each phase is the same, but they are out of phase with each other.
The three phases are used to power three-phase motors and other heavy-duty equipment.
In North America, the three-phase power supply is typically 208 volts or 480 volts.
In Europe, the three-phase power supply is typically 400 volts or 690 volts.

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