Shanghai Richeng Electronics Co. Ltd - ISO9001/IATF16949/ISO/TS22163
Choose Language

Wiring duct,Cable Gland,Cable Tie,Terminals,RCCN

Richeng takes you to know all the wires

Color meaning

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;

The collector of a semiconductor transistor;

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

4. Yellow

Phase A of the three-phase circuit;

The base of a semiconductor transistor;

The control electrode of thyristor and triac.

5. Green

Phase B of a three-phase circuit.

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.

7. Light blue

The neutral or neutral line of a three-phase circuit;

The grounded neutral of the DC circuit.

8. White

The main electrode of the triac;

Semiconductor circuits without designated colors.

9. Yellow and green two colors (each color is about 15~100mm in width alternately attached)

Grounding wire for safety.

10. Red and black in parallel

AC circuit connected with two-core wire or twisted-pair wire.

Choose different color wires according to the circuit

1. Three-phase AC circuit

Phase A: Yellow

Phase B: Green

Phase C: Red

Zero or neutral line: blue

Protective grounding wire: yellow and green color.

2. In a single-phase circuit

FireWire: Red

Zero line: blue

3. AC circuit connected with two-core wire or twisted-pair wire

Red and black parallel

4. DC circuit

Positive electrode: brown

Negative electrode: blue

Grounding wire: blue.

5. The internal wiring of the entire device and equipment

Black is generally recommended.

Comparison of the advantages and disadvantages of soft and hard wires

From the appearance of wires

Flexible wire, also called sheath wire, is generally a wire made of multiple copper wires with a diameter of less than 1mm. The hard wire is a relatively thick single-strand metal wire, generally directly above 1mm.

From the perspective of the nature of the wire

The thread of the cord is relatively thin and soft, which is convenient for turning and passing through the tube. However, it is easy to age over time and affect the service life of the entire circuit.

Hard wires are inherently relatively small in cross-section, resistant to the impact of short-circuit current, and hard wires are not easy to oxidize, and their lifespan is relatively longer than that of soft wires. However, the hard wire itself is hard to deal with when turning through the pipe.

Is the flexible cord better for home improvement or the hard cord longer life?

Each copper wire of the flexible wire is relatively thin, which is easy to be damaged and broken during installation, thereby affecting the electrical conductivity of the wire. On the contrary, the hard wire will not be affected by the construction process, and it is much better in reliability and durability.

Related articles

Previous: Four issues that need attention in the transformation of low-voltage power distribution
Next: One trick to teach you how to avoid the wrong plugging of the PC power interface
WeChat WeChat