The difference between the live wire and the ground wire, how to distinguish the fire wire from the

The live wire is live, the ground wire and the neutral wire are not brought, one of the two wires at home is the live wire, one is the neutral line, the electric pen can be measured to be live wire, the uncharged is the neutral line, the ground wire generally has three jacks, and the ground wire is generally connected to the shell of the electrical appliance to prevent leakage.

First of all, you are talking about the line of fire and the line of zero, right?

The two wires that come out of the transformer are actually not divided into live and neutral wires. After the two wires come out of the transformer, one of them is grounded and becomes a neutral wire; The other one is the line of fire. Therefore, the ground voltage of the neutral line is 0V (theoretical value, in fact, it is generally not 0, there is a little voltage), which is safe for people; The effective voltage of the live wire to ground is 220V, which is dangerous to compare.

By the way, talking about the ground wire. The so-called ground wire refers to the connection line between the housing of the electrical equipment and the earth. Its main function is to direct the electricity that accidentally appears on the equipment shell to the earth and ensure safety.

The live wire is live and used to transmit electricity, the hole on the right side of the three-hole socket is the live wire, and the ground wire is to prevent the leakage of household appliances, as long as the home appliances do not leak the ground wire, it will not be live, and the hole on the top of the three-hole socket is the ground wire.

The live wire has electricity, and the ground wire has no power and is grounded.

Touching the live wire will put your life in danger The ground wire is to prevent the household appliances from being electrified and will not power you

The method of distinguishing between the live wire and the neutral wire and the ground wire in the wire is as follows:

1.Object: The live wire is usually bright color such as red, and it is the live wire that is connected to an air switch at the main switch;

The zero line is usually blue or black and can be seen next to the line of fire.

The ground wire can only use the yellow and green two-color wire according to the standard, because the ground wire is very important to the safety of electricity, so its color requirements are very strict, and can not be replaced by other color lines.

2.Representation:

The live wire is n, the neutral wire is l, and the ground wire is e.

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In single-phase circuits (home circuits), red is the live wire, green is the neutral wire, and yellow-green is the ground wire. In some single-phase circuits, blue may be used as the neutral or yellow as the ground wire. Although it is not standard, the polarity of the wire can also be seen from the outside.

In a three-phase circuit, phase A is yellow, phase B is green, phase C is red, neutral is blue, and ground is yellow-green. 2.It is rare to distinguish the wire diameter in the single-phase circuit, but in the three-phase circuit, especially the circuit is relatively large, the wire diameter of the phase wire is often slightly thicker, and the wire diameter of the neutral wire and the ground wire is slightly thinner.

3.Look at the wiring If the color of the wire does not meet the regulations, but as long as the color is distinguished, you can judge the properties of the socket by observing the wiring of other devices - remove the socket, and there will be three wires behind. When the person is facing the front of the socket, the wire on the left hand side is the neutral wire, the wire on the right hand side is the live wire, and the middle wire is the ground wire.

Switch - Remove the switch, and the color of the wires inside the switch is live wire. Whether it's a switch or an outlet, it's possible that the wire was connected in the wrong direction when it was first wired, and if that is the case, it's not accurate. The most accurate thing is to observe the connection of the wires in the distribution box.

Distribution box - there is a zero row and a ground row in the distribution box, and the color of the outgoing line on the zero row is the indoor zero line; The color of the line on the ground row is the ground wire; The color of the outgoing wire of the 1P circuit breaker is the live wire. 4.The electric pen measures the closed circuit breaker while unplugging all the plugs in the circuit and turning off all switches.

The electric pen measures the three wires in turn, and the one that can light up the electric pen is the live wire. Once you find the live wire, take a light bulb (or a low-power appliance such as a charger) and connect one end to the live wire and the other end to either wire. If the bulb is on, the line is zero; Otherwise, it is ground.

5.Multimeter measurement, adjust the multimeter wheel to V gear, hold the black watch pen in your left hand, and wrap the line of the watch pen around your hand a few times. In the right hand, take the red pen and measure the three wires in turn, the high voltage is the live wire, the low voltage is the neutral wire, and the voltage is zero is the ground wire.

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Do you have any other questions?

The meaning of the red, yellow, black, green, and blue of the wire represents:

1. Red is the line of fire.

2. Blue is the zero line.

3. Yellow or yellow and white is the ground wire.

4. The yellow-green two-color line is specified as the protective ground wire.

5. Black is the grounding wire.

First, the color is different.

1. Livewire color: In the power cable, yellow, green, and red represent phase A, phase B, phase C (three-phase livewire) respectively.

2. Zero line color: blue represents the zero line.

3. Ground wire color: yellow and green color represents the ground wire.

Second, the voltage is different.

1. Live wire voltage: The voltage between different phase wires (i.e. live wires) is 380V.

2. Neutral line voltage: The voltage of the neutral line and a good grounding body is 0V.

3. Ground voltage: The ground wire does not have any current passing through.

Summary. Symbolically, the live wire represents L, the zero line represents N, and the ground wire represents PE.

What is the difference between live and neutral, ground?

Symbolically, the live wire represents L, the zero line represents N, and the ground wire represents PE.

1.Red is the live wire, blue is the neutral line, black is the ground wire, the live wire is connected to the positive pole of the power supply, the ground wire is connected to the negative pole, the neutral wire is grounded to play a protective role, so the voltage is zero, the three-phase four-wire three-phase is the ABC three-phase, the four-wire socks shout late is the ABC three-phase confession Li plus the zero line. Percolation.

2.The live wire is also known as the phase wire and the zero line together to form the Shansun power supply circuit, the zero line usually refers to the line drawn from the transformer grounding body, its sensitive resistance has strict regulations, must be less than or equal to ohms, so as to ensure the normal use of electrical equipment, the live wire is relative to the zero line, usually household electricity is only one of the phases of three-phase electricity, its line voltage is 220 volts, it is through the neutral line to form a circuit to make household appliances work.

3.The live wire is live, the ground is late and the zero line is not brought, there is a live wire in the socket of the two jacks at home, a zero wire, the electric pen can be measured to be charged is the live wire, the uncharged is the zero wire, the three-jack socket has a ground wire, the three Bu Huihong heads of the three-phase electricity are called the type book phase wire, and the three tails of the three-phase electricity are connected together and called the neutral wire, which is also called the zero line.

1. Different colors: 1. The color of the live wire: in the power cable, yellow, green, and red represent phase A, phase B, phase C (three-phase live wire) respectively. 2. Zero-line face mold cover color:

The blue color represents the zero line. 3. Ground wire color: yellow and green color represents the ground wire.

Second, the voltage is different 1, the voltage of the live wire: the voltage between the different phase wires (i.e. the live wire) is the line voltage, the neutral line voltage: the voltage of the zero line and the good grounding code brother is the ground wire tung voltage:

There is no current flowing through the ground wire.

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Summary. Hello dear, 1Red is the live wire, blue is the neutral wire, black is the ground wire, the live wire is connected to the positive pole of the power supply, the ground wire is connected to the negative pole, the neutral wire is grounded for protection, so the voltage is zero, the three-phase four-wire three-phase is ABC three-phase, and the four-wire is ABC three-phase plus the neutral line.

2.Live wire is also known as phase wire and neutral line together to form a power supply circuit, the zero line usually refers to the line drawn from the transformer grounding body, its connection resistance has strict regulations, must be less than or equal to ohms, so as to ensure the normal use of electrical equipment, live wire is relative to the zero line, usually household electricity is only one of the phases of three-phase electricity, its line voltage is 220 volts, is through the zero line to form a circuit to make household appliances work.

3.The live wire is live, the ground wire and the neutral wire are not brought, there is a live wire in the socket of the two jacks at home, a neutral wire, the live wire can be measured with an electric pen, the neutral wire is not charged, the ground wire is only in the socket of the three jacks, the three heads of the three-phase electricity are called phase wires, and the three tails of the three-phase electricity are connected together to be called the neutral wire and also called the neutral wire.

What is the difference between live and neutral, ground?

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Hello dear, 1Red is the live wire, blue is the neutral wire, black is the ground wire, the live wire is connected to the positive pole of the power supply, the ground wire is connected to the negative pole, the neutral wire is grounded to protect the Zhaozhi eggplant, so the voltage is zero, the three-phase four-wire three-phase is ABC three-phase, and the four-wire is ABC three-phase plus the neutral line. 2.

Live wire is also known as phase wire and neutral line together to form a power supply circuit, the zero line usually refers to the line drawn from the transformer grounding body, its connection resistance has strict regulations, must be less than or equal to ohms, so as to ensure the normal use of electrical equipment, live wire is relative to the zero line, usually household electricity is only one of the phases of three-phase electricity, its line voltage is 220 volts, is through the zero line to form a circuit to make household appliances work. 3.The live wire is live, the ground wire and the neutral wire are not brought, there is a live wire in the socket of the household two jacks, a neutral wire, the electric pen can be measured to be live wire, the uncharged is the neutral wire, the three-jack socket has a ground wire, the three heads of the three-phase electricity are called phase wires, and the three tails of the three-phase electricity are connected together and called the neutral wire, which is also called the zero line.

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