The voltage of live line and zero line is 220 V, how much is the voltage of two live lines? Why?

The voltage of live line and zero line is 220 V, how much is the voltage of two live lines? Why?

The voltage between two firing lines is 380 V, which is a problem of vector calculation. You draw an arrow from 0 to 220 to represent the 220 V phase voltage of 0 phase, then draw an arrow from 120 degrees to represent the phase voltage of 120 degrees, and then draw an arrow from one point to another. The length of the arrow is 380, which is the voltage between two firing lines

Why is there a voltage of 220 V between the live wire and the earth, while there is no voltage between the zero wire and the earth

The live line is 220 V and the neutral line is 0 V
The grounding of live wire is 220 V, because the earth is the zero wire. It means that you will get an electric shock if you stand on the ground and touch the live wire. If you float up or stand on an insulated object and touch the live wire, because there is no zero wire, there will be no electricity if there is no loop
However, the zero line is grounded at the end of the transformer
You stand on the ground and touch the zero line. The zero line itself basically has no electricity. You can't touch it

Why does the zero line and the live line have a voltage of 220 V? The incoming line in my shop is three-phase four wire, and there is no ground wire. I make a hole in the electric box to the column, put an explosion screw on the steel bar in the column, and then lead a line from the explosion screw to the ground wire row to use as the ground wire. However, both the live line and the ground wire have a voltage of 220, and the live line and the electric box shell are the same, How to deal with this? Will it have any impact? Can it protect the ground? I have so many electrical appliances here, and I can't do without ground wire!
Sorry, the question is why there is voltage between ground wire and live wire

The neutral line is originally grounded, and the grounding of the three-phase jack is to prevent the leakage of high-power electrical appliances. The potential of the neutral line grounding is the lowest, and the earth becomes a whole, so it is 0. The live line has current passing through, and the potential is high. There is a relative potential of 220 V between the two

The reason why the fire line and the zero line of the electric pen are bright

The zero line itself will not be bright. There are three possibilities for the zero line measured by the electric pen. One is that the line is in working state. The other is that the line will also be bright when it is not in working state. It indicates that a certain joint or place in the line is affected by moisture, which will not cause much damage. It is a normal phenomenon. The third is that the line is electrified in series. Once the line is electrified in series, it should be burnt out

Why is the fire line on and the zero line off when using the electric pen
Explain the following question again:
After the switch in the classroom is turned on, the light bulb doesn't work. After checking that the filament of the light bulb is in good condition, the live line and the zero line are tested with the electric pen. As a result, the neon tubes in the electric pen all light up,
After the switch in the classroom is turned on, the bulb is not on. After checking that the filament of the bulb is in good condition, use the electric pen to test the live line and the zero line. The result shows that the neon tube in the electric pen is luminous. It can be concluded that the cause of the fault is: A. short circuit of the zero line; B. loose wiring at the switch; C. open circuit of the live line; D. open circuit of the zero line
The answer is d
In answer D, isn't there no current passing through the open circuit? Why is the zero line still on when tested with the electric pen?

The current is through the fire wire to the earth to form a loop, the zero wire is a grounded wire, called the zero wire, the human body is a "Earth", when you use the measuring pen, one of your fingers is in contact with one end of the neon tube, so when you touch the fire wire, the natural current will form a loop through the neon tube, neon

How to distinguish live line, zero line and ground line with electronic test pen?
It is suspected that the fire zero line of the socket on the wall is connected reversely. Then, when the power is on, insert the fire line of the digital display measuring pen into a hole to show 12V 36V, and the light is on; the other two holes are not on, and there is no number. 1. The one with the light on should be the fire line, Why display 12V and 36V should not display 220V? 2. How to distinguish the remaining zero line from the ground line? I've read a lot of answers on Baidu about this question. I said that using electronic measuring pen to display 220V on the live line and 110V on the zero line made me go to the supermarket to buy a Jieyi / Jay digital display measuring pen. Now it seems that it's not easy to use. The method should be simple and accurate, It's best to use this test pen,

First of all, let me tell you how to read this digital display electric pen. Generally, the electric pen will display 12V / 24V / 48V / 110V / 220V / 380V, but the actual reading depends on the maximum value of the digital display meter, that is, the maximum value of the displayed data. For example, if 12V or 36V is displayed, the approximate value of the measured voltage is 36V. Secondly, the voltage of the live wire, that is

The three wire plug of the refrigerator is marked with the wire E. when it is inserted into the corresponding jack of the three wire socket, it is connected with the wire a, the live wire B, the zero wire C and the ground wire D

E: Ground wire; N: zero wire; l: live wire
So the answer is C

Symbol and function of live line, zero line and grounding wire
It was settled in the morning of the 27th

1. The live line, also known as phase line, is used to transport load current. According to the phase sequence, it is a phase, B phase and C phase. The phase angle difference is 120 degrees. The symbols L1, L2 and L3 are marked on the circuit diagram. UVW is generally marked on the circuit branch. According to the color, it is generally divided into yellow, green and red. For low voltage 0.4kV system, the voltage between any two phase lines is 380V; the voltage between any one phase line and zero line is 220V,
2. Zero line: the symbol n is usually a blue line. When the three-phase load is balanced, there is no current on the zero line; when the three-phase load is unbalanced, there is current on the zero line. There is no voltage on the normal zero line, and there is voltage on the zero line when the zero line is disconnected
3. Grounding wire: yellow green double color wire marked with symbol PE; it is connected to grounding ring network and equipment metal shell (or distribution device shell). When the insulation of equipment line is reduced or leakage occurs due to other reasons, it can reduce the current passing through human body, make leakage protector trip, cut off power supply and protect human body

Why is the grounding pin of three pin plug of household appliance longer than others?

The reason why the grounding pin of the three pin plug of household appliances is longer than others is that when the plug is inserted, it should be grounded first. In this way, once the household appliances leak electricity, it can effectively protect the user

What do the blue, yellow and brown lines on household appliances represent in the zero line, live line and ground line?

There are different definitions for different colors of wires in electrical appliances
Generally speaking, the red line is the power line, the AC line is the phase line, and the branch line is the positive line
Black line, zero line in AC, and coffee line in DC can sometimes be replaced as collector lead of open collector
Coffee color, basically not in AC. if there is, it is in the case of no other color line. DC, the same as black
The blue line can be used as phase line in AC and 0V line in DC
Yellow line, AC can be used as phase line, DC has no clear definition, can replace any color except red and blue
Yellow and green wires are used as ground wires in AC, but not in DC
If it is in the field of communication, there are many kinds of colors. The definition is also very different from that mentioned above