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What do the colors on the wires and cables mean?

Updated:18-06-2021
Summary:

Everyone knows that the wires in the cable have differe […]

Everyone knows that the wires in the cable have different colors. What are these colors used for? Below is the editor of Shenzhen Jinhuanyu Wire and Cable Co., Ltd. to introduce to you what the color on the cable means.
The color of the outer skin of the cable
National standard: yellow, green, red. Blue stands for A. B. C. N
1 When marking the circuit according to the wire color  
1.1 Black: internal wiring of devices and equipment. 
1.2 Brown: the positive pole of the DC circuit.
1.3 Red: three-phase circuit and C-phase;
The collector of a semiconductor transistor;
The cathode of a semiconductor diode, rectifier diode, or thyristor.
1.4 Color: Phase A of the three-phase circuit;
The base of a semiconductor transistor;
The control electrode of thyristor and triac.
1.5 Green: Phase B of the three-phase circuit.
1.6 Blue: the negative pole of the DC circuit;
The emitter of a semiconductor transistor;
The anode of a semiconductor diode, rectifier diode, or thyristor.
1.7 Light blue: the zero or neutral line of the three-phase circuit;
The grounded neutral of the DC circuit.
1.8 White: the main electrode of the triac;
There is no color semiconductor circuit. 
1.9 Two colors of yellow and green (each color is about 15~100mm in width alternately attached); grounding wire for safety.
1.10 Red and black parallel: AC circuit connected by double-core wires or twisted-pair wires.
2 When selecting the wire color according to the circuit  
2.1 AC three-phase circuit
Phase A: color;
Phase B: Green;
Phase C: red;
Zero line or neutral line, light blue;
Safety grounding wire: yellow and green double colors.
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