What color is used to represent the zero line and the ground wire in the home?

Color: There are three kinds of phase lines, yellow, green and red, which one is used in the specific home, which is generally determined according to the design provisions of L1L2L3. There is generally only one type in a family.

The zero line is generally blue.

The ground wire is generally yellow and green.

Of course, there are some places where the ground wire is black.

Inspection problems: In order to detect whether the wiring is correct during construction, there is a detection socket, which is plugged in according to the situation of the indicator light to see if there is a problem or what the problem is.

Of course, if you just test it yourself, the specification requires that the left zero and right fire, and the upper side is the ground wire.

If it's wrong, it will trip.

The neutral line is generally blue or black, and the grounding is yellow and green. Plug it in.

Whether it is industrial electricity or household electricity is unified, the live wire is yellow (a) green (b) red (c), the neutral line (n) is blue, and the ground wire (PE) is yellow and green. Specification requirements: The face of the two holes of a single item is the live wire on the right side of the socket.

Single-item three-hole or three-phase four-hole three-phase five-hole grounding wire in the upper hole.

The neutral line is generally black or blue.

The ground wire is generally a two-color wire with yellow and green colors.

The symbol of the neutral line at the socket is n

The ground wire is PE

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

Red or (brown) line of fire.

Blue zero line.

Ground wire yellow-green (two-color line).

The ground wire is two-color, and the other wires are monochrome!!

Electrician knowledge, plumbing knowledge sharing.

1. For the live wire in the household 220V mains, red or brown is generally used, because these two colors are hot colors. The neutral line is blue or green, black. The grounding wire is a two-color yellow and green wire.

2. The three-phase electric fire wire uses yellow, green and red colors to represent the three phases of AC A, B and C respectively.

Circuit diagram color.

The power grid in our country generally adopts the three-phase four-wire system, and generally speaking, most of the households use single-phase electricity with a voltage of 220V. Three-phase electricity is used for industrial electricity, with a voltage of 380V. The color of three-phase electricity is generally red, yellow, and green, and each phase can be called a live wire.

Therefore, the colors of the line of fire are generally red, yellow, and green. The zero line is neutral and generally blue. The ground wire is generally yellow and green, commonly known as flower line.

The ground wire is a yellow-green two-color line, the live wire is generally yellow, green, and red, and the zero line is a blue line.

Answer: Hello, I am very honored to be able to answer this question for you, according to my understanding and professional analysis, the color of the live wire (L) is generally red, yellow, brown to represent the zero line, (N) is generally black, blue is used to represent the ground wire (PE), and the yellow and green two-color line is generally used. I hope my answer will be helpful.

According to industry norms, the ground wire is the yellow and green two-color wire, the live wire is red, and the neutral wire is blue.

It's green or yellow-green. In general, in a three-phase circuit, the live wire uses three colors of red, yellow, and blue to represent the three live wires, and the neutral wire uses black.

In single-phase lighting circuits, yellow is generally the live wire, blue is the neutral wire, and yellow and green is the ground wire. In some places, red is used for the live wire, black for the neutral line, and yellow and green for the ground wire.

The ground wire is yellow and green, and the yellow, green, and red colors of the wire represent the three phases of AC voltage, A, B, and C, respectively.

As we all know, the power cord is divided into several colors, and each color represents a different line, so what color is the ground wire? Let's find out.

01 According to the current standard in China, when the third circuit in GB2681 is marked by the color of the wire, it should generally be the phase wire - phase A yellow, phase B green, and phase C red. Neutral wire - light blue, the ground wire is yellow and green, if it is a three-pin socket, the left is the neutral wire, the middle (top) is the ground wire, and the right is the live wire.

02 The ground wire can protect personal safety: because it is easy to produce a large amount of charge during electrostatic discharge, if the electrical equipment is not properly isolated, it will easily cause great harm to the electrical appliance itself and the human body, and the role of the grounding wire happens to become a wire between high-voltage equipment and the earth, so as to avoid people from being damaged by the charge.

03 The lightning protection effect of the ground wire: In the past, once thunder and rain occurred, power poles and other equipment were often damaged by lightning strikes, and sometimes they could not be used for several days, so the role of the grounding wire in lightning protection can have a very good protective effect, effectively prolonging the service life of electrical equipment.

04 The ground wire can ensure the normal operation of the equipment**For some work that must be carried out with electricity, such as medical work, the role of the grounding wire is to avoid encountering an emergency situation of power failure, which will not be affected and can still operate normally.

05 Now all circuits have leakage protectors, if the bulb is connected to the live wire and the ground wire, it will trip; The specific method is to prepare the test bulb, send the power, and then plug the test bulb into the live wire and neutral wire jack first, and the bulb will be on normally; Then plug the test bulb into the live wire and ground wire jack, the leakage protector trips to indicate that the ground wire is installed and is effective, and the leakage protector does not trip means that there is no ground wire.

The yellow, green and red colors of the three-phase insulated wire represent the AC voltage A, B, and C respectively, and the three-phase 220V mains phase wire is the live wire, which is generally red or brown, because these two colors are hot colors. The zero line is blue or green. Black.

The grounding wire is yellow and green.

Generally, the most commonly used is the phase line red, the neutral line blue, the ground yellow-green DC point red indicates the positive electrode, and the black is the negative electrode.

According to the national standard, the ground wire is the outer skin of the yellow and green two-color wire.

A ground wire is a wire in an electrical system or electronic device that is connected to the ground, to the enclosure, or to a wire with a reference potential of zero. On general electrical appliances, the ground wire is connected to the shell to prevent electric shock accidents caused by the internal insulation damage to the shell. Ground wire is short for grounding device.

Ground wire is further divided into working grounding and safety grounding. In order to prevent people from electric shock accidents when using electronic equipment such as home appliances and offices, the protective grounding is a kind of safety grounding protection wire.

The color of the live wire, ground wire and neutral wire in the wire is generally according to the following rules:

1. The line of fire, the letter L, in English, is generally red, but there are also brownish-gray colors.

2. Zero line, letter n, English is, the color is generally blue.

3. Ground wire, letter E, English, generally two-color line, the color is generally yellow and green.

The color of the wire is divided into the neutral wire and the ground wire: the cyan wire is the neutral wire, the red wire is the live wire, and the yellow and cyan wire is the ground wire.

Look at the line color. Usually the color of these wires is different, if it is a home circuit, the cyan is the neutral wire, the red is the live wire, and the yellow and cyan wire is the ground wire. It is also used in some circuits.

Yellow is used as the ground and blue is used as the neutral line. In a three-phase circuit, phase A is yellow, phase B is cyan, phase C is red, neutral is blue, and ground is yellow-cyan.

Pass the test. Find an electric pen for detection, start powering on, and the light will represent the live wire. Then cut off the neutral wire at the main power supply, connect only the live wire, and then power on, at this time.

The bright one indicates the zero line, and the non-bright one is the ground line. You can also find a 220 volt bulb, confirm the live wire, and connect the lamp head with two wires and the live wire to the brightness of the bulb.

Distinguish between the ground and zero lines, the darker one is the ground wire, and the brighter one is the zero line.

How to choose a wire:

1. First of all, look at the logo and certificate of the product to see if it has passed the safety certification. Only the quality of products that have passed safety certification can be guaranteed, and they can be used with confidence. Secondly, the wire is generally calculated according to the square, and we should choose the appropriate wire according to the actual situation, such as the square of the household lighting line, the socket and the air conditioning line with 4 square meters.

If you don't know how to choose, you can find a professional electrician to help.

2. There are many kinds of inner cores of wires, and you can't buy some counterfeit products because they are cheap. The wire with a copper inner core has better conductivity and is more durable, and the best one is copper. Cupronickel is a bit reddish in color and has a soft texture, whereas brass is yellowish and has a harder texture.

Summary. Hello, the colors of the line of fire are generally: red, green, yellow;

The colors of the zero line are generally: blue;

The color of the ground wire is generally yellow and green.

However, in practice, these colors are not standard and may vary, so it is necessary to know how to distinguish these three lines correctly.

What are the colors of the ground wire, the live wire, and the neutral wire?

Hello, the colors of the line of fire are generally: red, green, yellow; The colors of the zero line are generally: blue; The color of the ground wire is generally yellow and green.

However, in practice, these colors are not standard and may vary, so it is necessary to know how to distinguish these three lines correctly.

If you are not sure, you can measure it with an electric pen.