What does the color of the power cord mean?

The red color of the power line represents the phase line, the blue color represents the zero line, and the yellow-green color represents the ground line.

In the three-phase insulated conductor, yellow, green and red respectively represent the three phases A, B and C in AC voltage. In addition, the 220-volt phase line belongs to the fire line, which is generally red or brown, the zero line is blue, green or black, and the grounding line is yellow-green.

In addition, the 220-volt phase line belongs to the fire line, which is generally red or brown, the zero line is blue, green or black, and the grounding line is yellow-green.