How can you tell the difference between ground and zero? 20

Test with an electric pen on the socket, the high voltage is the live wire, the low voltage is the neutral wire, and the almost no voltage is the ground wire.

The neutral line is the line drawn from the neutral point (n) on the secondary side of the transformer, which forms a loop with the phase wire (l) to supply power to the electrical equipment. Under normal circumstances, the neutral line is repeatedly grounded (PEN) with the protective ground wire (PE) at the neutral point (N) on the secondary side of the transformer, which plays a double protection role. Voltage is the potential difference between two points, with which a charge flows through the wire to form an electric current.

It's the same as the principle that water flows from high to low. Water does work in the process of flowing, and electricity does work in the process of flowing. There is a voltage difference between the live wire and the neutral line, and the standard voltage of single-phase electricity in China is 220V.

Usually the top hole in the three-pin socket is the ground wire, and the bottom two holes are one for the live wire and one for the ground wire!

I remember when I was in my second year of junior high school.

I always taught a mantra.

On the ground, left, zero, right, fire.

I can understand it literally.

There are three holes, and the top is the ground wire, the zero wire on the left, and the live wire on the right.

As long as you can recognize left, right, up, down, o( o....

Plug in the socket and try to know which one is the neutral wire? Use a light wire to take the fire wire and the line in it.

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When wiring, it must be clear that its neutral wire and ground wire, if it is reversed or connected wrongly, it will bring trouble during use. Let's introduce to you how to distinguish between the neutral line and the ground wire.

How to distinguish between the neutral wire and the ground wire.

1. The concept is different.

The ground wire is a kind of line that connects the equipment or the shell of the electrical equipment, in order to prevent electric shock accidents.

The neutral wire is also called the neutral wire, the neutral wire is not current, it can go directly to ground, and the voltage is close to zero.

2. The role is different.

The neutral wire mainly plays the role of a loop, which is combined with the live wire, and the current passing through it is equal to the maximum flow of the corresponding live wire. The ground wire is mainly used for protection, and there will be no current and combustion through.

3. The wiring position is different.

The neutral wire is a line that is grounded at the neutral point of the transformer, and the ground wire is a wire that is grounded from the building.

4. The practical application after electric shock is different.

The ground wire is connected, which can play a protective role when using electrical appliances, and the ground wire can protect the whole system in parallel, without switching.

The consequences of the wrong connection of the neutral and ground wires.

1. Because it is alternating current, it will not have any impact on the electrical appliances after the replacement of these two kinds of mutual zhaoye, such as a three-hole socket, the left is the neutral line, and the right is the live wire, which is convenient for maintenance, and finally do not replace it.

2. Zero-sum ground connection is reversed or mixed, it doesn't matter when used at ordinary times, but there is danger, and the ground wire cannot be connected to the zero wire, otherwise it may cause the equipment shell to be electrified.

3. The ground wire can be made into a temporary zero line, if it is like this for a long time, there are many unfavorable factors, such as: thunderstorms, humidity and other weather will cause voltage instability, and when the voltage reaches 380V, etc., it may cause the equipment to be affected or damaged.

Summary: How to distinguish between the zero line and the ground wire is introduced here, and it can be distinguished according to the above, and it must be distinguished clearly, so that it will not bring danger when using it. If you want to know more about related knowledge, you can consult Qijia.com.

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When arranging wires at home, you first need to distinguish between what is the neutral wire, what is the ground wire, and the live wire? After distinguishing these three wires, the next step is to wire them according to certain specifications to ensure that they are not connected incorrectly. So, how do you tell the difference between a zero and a ground wire?

1. If you choose a regular thread, we can actually distinguish it by color. If you are in the line of fire, the main colors are yellow, red, and green, with red being the main color. The zero line is generally blue, and the ground line is generally yellow and green, so we can distinguish it by color first.

2. If there is no way to distinguish the colors, and it is not particularly accurate, we can use a multimeter to measure the voltage, and then we can judge whether it is the neutral or ground wire. First, you need to adjust the multimeter to the voltage level, then set the correct range, and then connect the meter pen to the wire. Select one of the wires and measure it.

If the voltage value is relatively high, it means that it is a live wire, and if the voltage is 0, it means that it is a ground wire. In the middle, it is the zero line.

2. What happens if the neutral wire and the ground wire are reversed.

1. It is a very dangerous measure to connect the neutral wire and the ground wire in reverse, because when the neutral wire fails, the electrical shell it is connected to will be electrified, because under normal circumstances, the motor shell is not electrified. Once contacted, there is a risk of electric shock.

2. If a leakage protector is installed in the home, it can operate normally, and there will be a tripping situation, which means that there is a problem with the circuit wiring at home.

3. On the other hand, if the neutral wire and the ground wire are reversed, because the cross-sectional area is the same, the same current needs to be passed. At this time, the ground wire should be slightly thinner than the zero wire, and the problem of overheating will occur after the wrong connection, which will cause a fire hazard.

I concluded: when arranging wires at home, we must lay them reasonably, otherwise it will lead to a series of problems, so we need to distinguish between the zero wire and the ground wire before, so as to avoid connecting the zero wire and the ground wire wrongly, bringing a series of potential safety hazards.

<> distinguish by color or voltage. If the neutral and ground wires are selected according to the standard regular wires, they can be distinguished by color. As a general rule, the blue line is the zero line, and the yellow and green lines are the ground wire.

If you are afraid that the color is not made according to the standard, you can observe the change of voltage through a multimeter. Adjust the multimeter to the position of the voltage, set the range correctly, and connect the pen to the selected wire. At this time, the change in the value is observed, and if the voltage value is zero, it proves that it is a ground wire.

If the voltage value comes from the middle part, then it is the neutral line.