What does the color on the wires and cables mean?

We all know that several wires in the cable have different colors. What are these colors used for? The following is the Henan Qingzhou cable manufacturer to introduce what the color on the cable means.

Specification for cable skin color

National standard: yellow, green, red and blue represent a.b.c.n

when the circuit is marked according to the wire color

1 Black: internal wiring of devices and equipment.

2 Brown: positive pole of DC circuit.

3 Red: three-phase circuit and phase C;

Collector of semiconductor triode;

Cathode of semiconductor diode, rectifier diode or thyristor.

4 yellow: phase a of three-phase circuit;

Base of semiconductor triode;

Control pole of thyristor and bidirectional thyristor.

5 green: phase B of three-phase circuit.

6 blue: negative pole of DC circuit;

Emitter of semiconductor triode; cable price

Anode of semiconductor diode, rectifier diode or thyristor.

7 light blue: zero line or neutral line of three-phase circuit;

Ground neutral of DC circuit.

8 white: main electrode of bidirectional thyristor;

Semiconductor circuit without specified color.

9 yellow and green (each color has a width of about 15~100 mm and is attached alternately); Safety grounding wire.

10 red and black parallel: AC circuit connected by twin conductor or twisted pair.