How to connect the red, white and black lines with red, white and blue?

1, the red line is red, the white line is white, and the black line is blue. Among the red, white and black lines, the red line is positive, the white line is negative and the black line is neutral;

2. In the red, white and blue connection, the red line is positive, the white line is negative and the blue line is neutral;

3. When wiring the power supply, it must be connected according to the red, white, black and blue wires, and it is not allowed to be reversed, so as to avoid potential safety hazards.