There are three wires at home, how to distinguish the wires

The three wires in the house are the live wire, the neutral wire, and the ground wire.

Wiring standards. The color of the line of fire (L) shall be red, yellow, and green; The color of the zero line (n) shall be black and blue; The color of the ground wire (PE) shall be yellow and green. Face 3-pin socket, left zero, right fire, middle ground.

Install a leakage circuit breaker on the bus.

Use a bulb to connect the live wire and the neutral wire or the live wire and the ground wire, if the leakage circuit breaker action indicates that it is the ground wire, otherwise it is the neutral wire.

If at home: with electricity, use an electric pen.

test, all that will light up is the line of fire. Disconnect the zero line at the main switch, only turn on the live wire, turn on the lights at home in the open position, measure with an electric pen, it was not lit just now, and now it is all the zero line. All that is left unlit is ground.

The simplest, take a 220V bulb, use an electric pen to determine the live wire, respectively with two wires and live wire connected to the lamp head, from the brightness can distinguish the zero line and the ground wire, the bright one is the zero line, the slightly darker is the ground wire.

with a multimeter. Put the multimeter in the AC file 500V, pinch a meter pen, and the other meter pen is connected to the power cord respectively, the high voltage is the live wire, the low is the neutral line, and the voltage is 0 is the ground wire. The resistance of the neutral line to ground is less than 4 ohms for reliable grounding.

Use a multimeter to place the pressure difference between the 250V fire line and the neutral line, the live wire and the ground wire in the AC file, and the difference between the two values is less than 5V for reliable grounding.

Extended Materials. Wires and cables are composed of four parts: conductor, insulation, shielding and protective layer.

1. Conductor. The conductor is the conductive part of the wire and cable, which is used to transmit electrical energy and is the main part of the wire and cable.

2. Insulation layer.

The insulation layer is to electrically isolate the conductor from the earth and the conductors of different phases to ensure the transmission of electric energy, and is an indispensable part of the wire and cable structure.

3. Shielding layer.

Wires and cables of 15kV and above generally have conductor shielding and insulation shielding.

4. Protective layer.

The function of the protective layer is to protect the wire and cable from the intrusion of external impurities and moisture, as well as to prevent external forces from directly damaging the power cable.

Three wires were introduced in the house, and the three wires were called the live wire, the neutral wire, and the ground wire.

How dangerous it would be if a person touched a high-voltage line! So on many poles that pass through high-voltage wires, there is always a sign that reads: "High voltage is dangerous!"

When people see this sign, they can't help but look up. But this look, I can see that the problem is coming, there are a few cute swallows standing on the wire! They were laid-back, chirping, not caring about the "high pressure danger!"

warning signs.

So, why don't swallows get electrocuted when they stand on a wire? Originally, when we talk about electric shock in a person or livestock, we mean that an electric current passes through the body. There are usually four wires drawn from the power plant, one of which is connected to the earth, called the neutral line, and the other three are not connected to the earth, which is called the fire wire.

There are generally only two wires introduced into the user, one is the neutral wire, the other is the live wire, and some are three, and one more ground wire is added. There are two contact points on the head of the light bulb, one is connected to the live wire and the other is connected to the ground wire, so that the electricity comes from the live wire, passes through the filament, and then goes back from the ground wire or the ground, so that the light bulb will turn on. If a person touches a line of fire and the person is standing on the ground, an electric current can pass through the person, and an electric shock accident will occur.

The reason why swallows standing on high-voltage power lines will not be electrocuted is because they only touch one live wire, not another wire, and no contact with the ground, so there is no electric current in their bodies and they will not be electrocuted.

However, birds also have electric shock, birds sometimes stand on the high-voltage line, and grind their mouths on the iron frame, if the iron frame is not insulated, the current will pass through the bird, flow through the iron frame into the ground, in this way, the bird will also be electrocuted, such a thing also often happens, in order to prevent birds from being electrocuted, you can install an insulated frame on the iron frame, or install a small windmill on the pole that "rolls" to make a sound, warn the bird not to stay on it, make a nest.

Three wires were introduced into the house, namely the fire wire, the neutral wire and the ground wire.

The three wires are the live wire, the neutral wire, and the ground wire.

Neutral line: Usually the power transmission is in the form of three phases and four wires, the three ends of the three-phase electricity are called phase wires, and the three tails of the three-phase electricity are connected together and called neutral wires"Zero line"。The reason why it is called the neutral 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 with the earth is close to zero.

Live wire: The three phase wires and the neutral wire of three-phase electricity have a voltage of 220, which will produce electric shock to people, commonly known as it"Fireline"。In electrical engineering, the alternating voltage connected to the mains line is 220 volts (abbreviated as volts, the symbol is V), and one wire is a live wire.

Grounding wire: Under normal circumstances, the ground wire is connected to the ground and will not leak.

Connection: In the two holes, the left hole is connected to the zero line, and the right hole is connected to the live wire. In the three-hole socket, the upper hole is connected to the ground wire, the left hole is the neutral wire, and the right hole is the live wire.

Summary. Hello Kiss Hello I am happy to answer for you, in general, the color of the three wires is red, blue or black, and yellow-green. If one of the three wires is blue or black, then the line is neutral; If one of the three wires is red, then this wire is the firing wire; The rest of the wire is the ground wire.

Hello Kiss Hello I am happy to answer for you, in general, the color of the three wires is red, blue or black, and yellow-green. If one of the three lines is blue or black, then the line is the zero line; If one of the Sanga Rann Threads is red, then this thread is the Flame Thread; The rest of the wire is the ground wire. Stuffy skin.

Kiss and don't make trouble, expand for you: In the circuit, the neutral wire is very important, and it usually needs to be connected to the end of the wire. In a normal situation, the red wire is the firing wire cover, and the neon tube can be made to glow through the electric pen.

If we need to distinguish between wires, then the red wires are the fire wires

Enter the area and get the decoration for free**].

We need to distinguish the different colors and then connect the wires according to their nature, because if you connect the wrong wire, the consequences are unimaginable. There are many types of wires, such as live wire, neutral wire and ground wire, how to distinguish these three wires by color? Today, I will tell you about the difference between the colors of the three wires.

1. How to distinguish the color of three wiresThe color of the three wires is not the same, and we can divide it according to the color. If the clan shout is a fire line, it is red, and the red one generally serves as a warning, so we need to pay attention to the wiring. The color of the zero line is blue, and the color of the ground wire is generally yellow and green, we can simply distinguish the three lines by different colors, and what type they correspond to.

Second, with the help of tools to distinguish wires 1, you can use an electric pen to distinguish the live wire and the neutral line. Take a voltage detector first, and touch the cores of the three wires respectively, if you find that the light is on, then this wire is the live wire. If it doesn't light up, it may be a neutral and ground wire.

2. We can use the multimeter to measure, and when using, we need to adjust the multimeter to the correct gear, generally speaking, to the voltage level, and the voltage volt generally needs to reach 750 volts. Because the live wire has been distinguished, so we are mainly to distinguish the zero wire and the ground wire at this time, the multimeter pen touches the remaining two wires, if the voltage value is displayed at 220 volts, this wire is the neutral line, and the other wire is the ground wire. 3. If there is no electric pen or multimeter, we can also use the bulb to distinguish the live wire and the zero line Zhaoye, first prepare a test bulb, and connect any two of the wires to the bulb, if you find that the bulb is on, one is the live wire.

If the brightness of the bulb is not particularly high, it is possible that one of them is the ground wire, and if it is not lit at all, it must be the zero line. Summary: In life, we need to connect wires, and when wiring, we must first distinguish what is the live wire, neutral wire and ground wire.

We can distinguish by color, or by some tools, we can effectively distinguish what each of the three lines represents.

Do the math how much it will cost you to renovate your home

<>First of all, it is distinguished by color, generally in the household wire, the red color of the micro fire wire, the zero line is generally blue, sometimes black, and the ground wire is yellow and green. The most important thing for home improvement sockets is to separate the ground wire. You can also use the electric pen to connect the jack on the socket of three wires with the electric pen, and the electric pen indicator light is on the live wire, and the other two are the neutral wire and the ground wire.