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Cable: What do the colors on the wires and cables mean?

Cable: What do the colors on the wires and cables mean?

Everyone knows that the wires in the cable have different colors. What are these colors used for? Let me introduce to you what the color on the cable means.

The color of the outer skin of the cable

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

When the circuit is marked by the color of the conductor

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1.1 Black: Internal wiring of devices and equipment.

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1.2 Brown: the positive pole of the DC system circuit.

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1.3 Red: Three-phase circuit and C-phase

Collecting electrode of semiconductor triode;

Cathode The cathode of a semiconductor diode, rectifier diode, or thyristor.

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1.4 Yellow: Phase a of the three-phase circuit;

The base of a semiconductor transistor;

Control electrode of thyristor and bidirectional thyristor.

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1.5 Green: Phase B of the three-phase system circuit.

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1.6 Blue: negative pole of DC loop;

The emitter of a semiconductor transistor;

The semiconductor passes through the anode of a diode, rectifier circuit diode, or thyristor.

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1.7 Light blue: the neutral or neutral line of the three-phase circuit;

The grounded neutral of the DC circuit.

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1.8 White: the main electrode of the triac;

Semiconductor display circuits without designated colors.

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1.9 Yellow-green (each color is about 15 mm in width and 100 mm alternately); safety grounding wire.

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1. 10 Red and black parallel: AC circuit connected with twin-core conductor or stranded wire.

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2When selecting the wire color according to the circuit

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2.1 AC three-phase circuit

Phase A: yellow;

Phase B: Green;

Phase C: red;

Zero line or neutral line, light blue;

Safety ground wire: yellow and green.

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2.2 AC system circuit connected with double-core wires or twisted-pair wires: red and black for parallel.

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2. 3 DC circuit

Positive electrode: brown;

Negative electrode: blue;

Grounding neutral line: light blue.

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2. 4 semiconductor circuit semiconductor transistor

Collector: red;

Base: yellow;

Emitter: blue.

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Semiconductor diode and rectifier diode

Anode: blue;

Cathode: red.

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Thyristor

Anode: blue;

Control pole: yellow;

Cathode: red.

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Triac

Control pole: yellow;

Main electrode: white.

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2.5 General recommendations for the internal wiring of the entire plant and equipment: black;

Semiconductor circuit: white;

In the case of confusion: In addition to the specified colors (such as: orange, purple, gray, green, blue, rose red, etc.) are allowed.

2.6 When specifically marking colors, if two or more colors can be marked on a wire, the color should be determined according to the specific conditions of the circuit and a certain meaning that needs to be expressed in the circuit.

If you like, follow Hongsheng Wire and Cable Co., Ltd., and hope to help everyone. Hongsheng Wire and Cable Co., Ltd. specializes in the production of power cables, copper-core wires, wires, cables, and copper-core cables. The products are of good quality and guaranteed. Welcome to negotiate!

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