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What is the color of the wire and cable?
- May 18, 2017 -

Cable skin color cable sheath color specifications


               


(a) When the circuit is marked according to the wire color

1. Black: Internal wiring of devices and equipment.

2, brown: the positive pole of the DC circuit.

3. Red: three-phase circuit and C-phase; collector of semiconductor transistor; cathode of semiconductor diode, rectifier diode or thyristor.

 4. Yellow: Phase A of the three-phase circuit; the base of the semiconductor transistor; the control electrode of the thyristor and the triac.

 5. Green: Phase B of the three-phase circuit.

 6. Blue: negative electrode of a DC circuit; emitter of a semiconductor transistor; anode of a semiconductor diode, rectifier diode, or thyristor.

 7, light blue: three-phase circuit of the neutral or neutral; DC circuit grounding the center line.

 8. White: The main electrode of the triac; no specified color semiconductor circuit.

 9, yellow and green color (each color width of about 15 to 100 mm alternately attached); safety ground wire.

10, red, black parallel: AC circuit with double core wire or double twisted wire connection.

(b) When selecting the wire color according to the circuit

1. Phase A of AC three-phase circuit: yellow; B phase: green; C phase: red; neutral or neutral, light blue; safety ground: yellow and green.

2. AC circuit connected with double-core wire or double-strand wire: Red and black are parallel.

3, positive DC circuit: brown; negative: blue; grounding center line: light blue.

4, the collector of the semiconductor circuit semiconductor transistor: red; base: yellow; emitter: blue. The anode of the semiconductor diode and rectifier diode: blue; cathode: red. SCR anode: blue; control electrode: yellow; cathode: red. The control electrode of the triac is yellow: the main electrode is white.

5, the internal wiring of the entire device and equipment is generally recommended: black; semiconductor circuit: white; when there is confusion: allow the selected color other than the specified color (such as: orange, purple, gray, green blue, rose red, etc.).


6, when the specific color, on a wire, in case of two or more than two colors, according to the specific circumstances of the circuit, according to the circuit needs to be expressed in a certain sense of color.


                 


When selecting the wire color according to the circuit


1, AC three-phase circuit


Phase A: Yellow;


Phase B: green;


Phase C: red;


Neutral or neutral: light blue;


Safety ground wire: yellow and green.


2. AC circuit connected with double-core wire or double-strand wire:


Red and black in parallel.


3, DC circuit:


Positive: Brown;


Negative electrode: blue;


Grounded neutral: light blue.


4. Collectors of semiconductor transistors in semiconductor circuits: red; base: yellow; emitter: blue.


Anodes of semiconductor diodes and rectifier diodes: blue;


Cathode: Red.


SCR anode: blue;


Control pole: yellow;


Cathode: Red.


Bipolar thyristor control pole: yellow;


Main electrode: white.


5, the internal wiring of the entire device and equipment is generally recommended: black; semiconductor circuit: white; when there is confusion: allow the selected color other than the specified color (such as: orange, purple, gray, green blue, rose red, etc.).


6, when the specific color, on a wire, in case of two or more than two colors can be marked, depending on the specific circumstances of the circuit, according to the circuit needs to be expressed in a certain meaning fixed color.