What color is the live wire and the neutral line, and what is the difference between the color of th

Firewire wire colors are usually red, green, and yellow; The color of the neutral wire is mostly black and blue; The ground wire is generally a yellow and green wire. Some electricians do not follow the standard wiring when wiring, and you can also distinguish between the live wire and the neutral wire through tools such as electric pens and universal meters.

Zero line of fire. Refers specifically to the power supply line of civil electricity, and the AC power supply voltage of the mains is 220 volts (V) (different countries, China is 220V). It consists of a neutral wire n and a live wire l.

In order to make alternating current.

There is a very convenient power conversion function, usually the power transmission is in three-phase four-wire.

way, three-phase electricity.

The three ends of the three heads are called phase wires, and the three tails of the three-phase electricity are connected together to call the neutral wire"Zero line"。The reason why it is called the zero line is that there is no current passing through the neutral line at the time of three-phase equilibrium, and then it is directly or indirectly connected to the earth, and the voltage difference between it and the earth is close to zero.

In the common single-phase cables, the brown is the live wire, the blue is the neutral wire, and the yellow and green two-color wire is the ground wire.

The commonly used color of single-phase electricity is red for the live wire, and blue and green are for the neutral line. Yellow is the ground wire. The color of three-phase electricity is red, green, and blue, and it is three live wires. Yellow is the ground wire. There are also individual differences.

In general, red, yellow, and green are the colors of the line of fire. Black and blue are the zero line colors.

Red is the line of fire, and blue is the line of zero.

There are many colors of wires, what color represents the live wire and the neutral wire? The electrician foundation is worth collecting.

The 3 wires are all blue, how to distinguish the neutral and ground wires of the live wire? The old electrician used only one trick.

1;In accordance with the (low-voltage user electrical installation regulations) yellow and green two-color wire connection protection grounding, that is, the top of a pile head, light blue (blue) color connection zero line (or called the center line), red or color eye-catching to do phase wire, you only have gray phase wire (live wire).2;You said that there is a three-phase socket, and there is a contradiction between the statement and the back, how to distinguish the fire (phase) wire, (ground) wire, and neutral wire. Three-phase socket refers to 380 volts, with three-phase U-phase, V-phase, and W-phase voltages, plus a neutral wire or grounding wire.

Single-phase three-prong socket refers to 220 volts, with phase wire, neutral wire, and ground wire.

Gray is the fire wire, blue is the zero line, and yellow and green is the ground wire

The line of fire must be red, the line of zero has green and black, and there are other colors as well! But beware that red is the line of fire!

Red, green, and yellow are the fire wires, and black and blue are the zero lines.

In general, red, green, and yellow are the fire wires, black and blue are the neutral wires, and yellow and green are the ground wires. However, in the actual wiring process, some electricians will not wire according to this standard, so if you want to know which is the live wire and which is the neutral wire, you should use an electric pen or a multimeter to distinguish it, so that it is more accurate.

Precautions for circuit installation

1. It is forbidden to operate with electricity

In order to avoid electric shock, during installation, it must be operated when the power is disconnected, and it cannot be operated in the case of electricity, after installation, it is also necessary to check whether there is a problem, it is best to make the power on test machine, in addition to the performance of the test machine, there is also whether its shell is charged, if the shell is electrified, it should be repaired in time.

2. Safety first

In order to make the circuit safe to use, a soldering wire should be installed in the distribution box, when the current in the line is more than the temple, it will cut off the power supply, to avoid some unnecessary accidents, and at the same time can also protect the safety of the line and electricity, remember that the soldering wire must meet the specifications of the installation, if it is in the sub-household it is best to install a leakage protector.

3. The maximum load of planned power supply

There are more and more types of household appliances, and each home has a variety of electrical appliances, so it is easy to overload the line. In order to be able to make electrical appliances use electricity safely, when installing, the power supply must be calculated at the highest load, a separate socket must be set up in each family, and several electrical appliances must not be set up to use a broadcast head, otherwise it is easy to lead to overload of the line, and the performance of electrical equipment will be affected.

The live wire is generally yellow, green, red, yellow, green, and red represent phase A, phase B, phase C (three-phase live wire), blue represents the neutral wire, and yellow and green colors represent the grounding wire. Dismantle with the L alphabet.

There are two wires in the lighting circuit, one is called the live wire, and the other is called the neutral wire. The difference between the live wire and the neutral wire is that they have different voltages to the ground: the voltage of the live wire to the ground is 220v; The voltage of the neutral line to the ground is equal to zero (which itself is connected to the earth).

So when one part of the person hits the line of fire and the other part is standing on the ground, and the voltage between these two parts of the person is equal to 220V, there is a risk of electric shock. On the contrary, even if a person uses his hand to grasp the zero line, if the person is standing on the ground, because the voltage of the zero line to the ground is equal to zero, the voltage between the various parts of the human body is equal to zero, and the person is not in danger of electric shock. Brigade Zheng Jing.

If the live wire and the neutral wire once touched, because the voltage between the two is equal to 220 volts, and the resistance between the two contact points is almost equal to zero, the current is very large, and a huge amount of heat will be generated at the contact point of the live wire and the neutral wire, thus emitting an electric spark, and the temperature at the spark is high enough to melt the metal wire.

Circuit differences

Neutral line (n): Mainly used in working circuits, the main trunk line that leads from the neutral point of generators and transformers and is grounded.

Ground Wire (PE): Not used in working circuits, only as a protective wire. Using the absolute "0" voltage of Dacong brother, when the leakage occurs in the equipment shell, the current will quickly flow into the ground, even if there is an open circuit in the PE line, it will flow into the ground from the nearby grounding body.

After grounding from the neutral point of the transformer, the main line is drawn out and the grounding is repeated every 20-30 meters).

The above content refers to Encyclopedia-Fireline.

Encyclopedia - Zero Line.

The neutral line is generally pale blue or green, while the live wire is red or brown. The color can be said to be a relatively simple way to distinguish the wire in the front and middle, but if there are many types of colors in the wire, it is not very accurate to distinguish it by color.

The live line, abbreviated as L (live), is generally red or yellow or green, and the zero line, abbreviated as N (neutral), is generally blue.

Neutral live wire, specifically refers to: the power supply line of civil electricity, the AC power supply voltage of the mains is 220 volts (V) (different countries, China is 220V). It consists of a neutral wire n and a live wire l, the neutral wire is grounded (ground is zero, PE), so it is called a neutral wire.

The mainland generally uses red to indicate the L (live) line, which is the line of fire; Blue represents the n (neutral) line, which is the zero line; The yellow-green color (commonly known as the flower line) indicates the ground line (E line).