Three phase wire color? What color wire is used for three phase wire in electricians

Phase A wires are red, phase B wires are green, phase C wires are yellow, neutral wires are blue or light purple, and common ground wires are yellow-green interphase wires.

Take the low-voltage power supply line as an example: the power supply line is generally relatively neat, the three-phase wire is generally yellow, green and red, and the zero line is blue or black; Other lines such as telecom, IPTV.

The color of the line is generally black and white, which is messy. If you can't tell, please call the 24-hour power supply service**95598 for consultation, and the staff will continue to answer for you.

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Electrical wiring color standard.

CE standard: power line: all three phases are black; Neutral line: blue control live line: red; Ground: Yellow-green.

24V+(24V): Yellow; 24V-(GND): Light blue.

Control Neutral Line: Blue.

American Standard: Power line: three-phase is red, black and brown; Control Neutral Line: White.

Control Fire: Red; Ground: Green.

24V+(24V): Yellow; 24V-(GND): Light blue.

Domestic standard: power line: three-phase yellow-green-red; Neutral line: Black.

Control Fire: Red; Ground: Yellow-green.

24V+(24V): Yellow; 24V-(GND): Light blue.

Control Neutral Line: Black.

The color of the three-phase wire is yellow, green and red, which represents the three live wires, L1, L2, L3, or ABC three-phase. The zero wire is blue or black, and the ground wire is yellow and green.

The colors of the three-phase wires are: A phase is yellow, B phase is green, C phase is red, there are several names to copy, A, B, C, L1, L2, L3, U, V, W, the order is the same.

The blue is the zero line, and the yellow and green are the ground wires.

Hello. The colors of the three-phase wires are: yellow --- phase A, green --- phase B, and red --- phase C.

In addition, there are zero and ground lines: the zero line --- blue, and the ground --- yellow line with a green longitudinal line.

The standard wire colors of the three-phase five-wire system are: A wire yellow, B wire blue, C wire red, N wire brown, PE wire yellow-green or black.

The red, yellow and green colors mark the phase difference of the three phase lines.

A phase with yellow.

B phase with green.

C phase with red.

Neutral blue.

Ground yellow and green.

The three-phase five-wire system includes three phase wires (A, B, C), neutral (N) and ground (PE wire) of three-phase electricity. The ground wire is connected to the neutral wire on the power supply transformer side, but it cannot be used as a neutral wire after entering the user side, otherwise it will be no different from the three-phase four-wire system after chaos.

The three-phase five-wire system includes three phase wires (A, B, C), neutral (N) and ground (PE wire) of three-phase electricity. The ground wire is connected to the neutral wire on the power supply transformer side, but it cannot be used as a neutral wire after entering the user side, otherwise it will be no different from the three-phase four-wire system after chaos.

The state stipulates that the voltage between the phase wires (i.e., line voltage) of civil power supply lines is 380V, and the voltage between the phase wire and the ground wire or neutral wire (i.e., phase voltage) is 220V. The entrance line generally adopts a single-phase three-wire system, that is, one of the three phase wires and a neutral wire (as a neutral line) and a ground wire.

The color of the three-phase five-wire standard wire in the national standard is: A line yellow, B line green, C line red, N line blue, PE line yellow and green.

GB5023 (cable specification) in the provisions on the color identification of the insulation layer:

The color of the three-phase electric cable is yellow + green + red + blue + yellow and green.

Generally, manufacturers comply with national regulations, and the standard wire color of five-core cable for three-phase is: A line yellow, B line green, C line red, N line blue, PE line yellow and green.

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A phase is yellow, B phase is green, C phase is red, there are currently the following names, A, B, C, L1, L2, L3, U, V, W, the order is the same. The wiring in the motor is generally UVW and XYZ

According to the national standard (GB681), in order to facilitate the identification of the role and category of various wires in the complete set of devices, the color signs of various types of wires are clearly specified as follows:

1. Black - the internal wiring of devices and equipment;

2. Brown - the positive pole of the DC circuit;

3. Red - the third phase of the AC three-phase circuit;

the collector of a semiconductor transistor;

cathodes of semiconductor diodes, rectifier diodes, and thyristors;

4. Yellow - the first phase of AC three-phase circuit.

the base of a semiconductor transistor;

gates of thyristors and bidirectional thyristors;

5. Green - the second phase of the AC three-phase circuit;

6. Blue - the negative pole of the DC circuit;

the emitter of a semiconductor transistor;

anodes of semiconductor diodes, rectifier diodes, and thyristors;

7. Light blue - the neutral or neutral line of the AC three-phase circuit;

Grounding midline of DC circuits;

8. White - the main electrode of the bidirectional thyristor;

Semiconductor circuits without specified colors;

9. Yellow and green two-color - grounding wire for safety;

10. Red and black parallel - AC circuits connected by double-core wires or double-stranded wires.

Electrician 1l The line of fire is generally yellow, green, red2n The zero line is blue.

3.e The ground wire can be yellow and green two-color line (flower line) 4The white and black color is used for the control line switch.

The standard four-color is red, yellow, green, and blue, and the ground wire is a two-color line. Choose three of the four colors. I like to use red, yellow, and green.

Phase A is yellow, phase B is green, phase C is red, zero line is blue, ground wire is black.

1.The current 2019 GB standard is the most detailed and clear.

GBT 4026-2019 Human-Machine Interface Printed Terminal Text, Graphic Identification Wire, Terminal Color

2.other proprietary industry standards.

JGJ46-2005 Technical Code for Temporary Electricity Safety on the Construction Site" phase line yellow, green, red, n, light blue, it is strictly forbidden to mix.

DL T 5352-2018 Code for the design of high-voltage distribution devices》 The ABC color sign should be yellow, green and red.

3.Standard analysis.

Note: "JGJ46-2005", "DL T 5352-2018" high voltage refers to more than 1KV, should not conflict with the national standards, so these two industry standards are used in a small range, all ordinary mechanical and electrical product design engineers should refer to the "GBT 4026-2019 man-machine interface printed terminal text graphic identification wire, terminal color".

The color of the three-phase electric wire is yellow. GreenRed, according to the provisions of GB5023 (cable specification) on the color identification of the insulation layer, the A phase is yellow, the B phase is green, the C phase is red, the N (neutral wire) is blue, and the PE wire (ground wire) is yellow and green.

The color of the three-phase electric cable is yellow + green + red + blue + yellow and green.

In fact, it is impossible for a three-phase load composed of multiple single-phase loads connected to a three-phase circuit to be perfectly symmetrical. In this case, the midline is particularly important, rather than optional. With the voltage at both ends of each phase load in the center line, it is always equal to the phase voltage of the power supply, and will not change due to the asymmetry of the load and the change of the load.

Just as each phase of a power supply supplies power to each phase of the load individually, each load will work properly. If there is no center line in the case of asymmetrical load, the three-phase three-wire power supply of asymmetrical load is formed.

The yellow, green and red represent the three phase wires of the three-phase electricity, and the three wires are 380V between them.

The light blue represents the zero line, and the yellow, green and red phase lines and the blue line are 220V, which is the mains power that we usually use.

The yellow + green two-color wire represents the grounding protection wire, and there are also black ones that represent the ground wire.

Yellow, green, and red represent the ground wire, the neutral wire, and the live wire, respectively.

In order to make the alternating current have a very convenient power conversion function, usually the power transmission is in the form of three-phase four-wire, the three ends of the three-phase electricity are called phase wires, and the three tails of three-phase electricity are connected together to be called neutral wires, also called "zero wires".

The ground wire is short-circuited to the earth through a deeply buried electrode. The transmission of mains power is in a three-phase way, and there is a neutral wire, the current of the neutral wire is zero when the three-phase balance, commonly known as the "zero line", another feature of the neutral line is that it is short-circuited with the ground wire in the total distribution input of the system, and the voltage difference is close to zero. The three phase wires of three-phase electricity have a voltage of 22 voltages with the neutral wire, which will produce electric shocks to people, commonly known as "fire wires".

Yellow-green-red is the color of the three-phase electric ABC phase, and the single-phase one is generally red (live wire) + blue or black (zero wire) + yellow-green two-color wire (ground wire).