零线火线地线（Ground wire）

零线火线地线（Ground wire） 零线火线地线(Ground wire) About the difference between the line of fire and the zero line, there is no need to make a theoretical inquiry in the junior middle school, but only the following aspects can be clearly understood: 1, ordinary household lighting circuit, FireWire and earth exist between the 220V voltage, zero line with the earth there is no voltage (or voltage is 0), so there is also between the line and zero line 220V voltage. 2, with a test pencil can identify the firing line and the zero line. The neon light is fire, otherwise it is zero line. (1) two sockets home wall, a jack is connected with another connecting wire, Jack is the zero line, you can use the test to find out which is connected with FireWire jack. (2) access lamp (or home appliances other) wires, one is a FireWire, zero line, you can also use the test to distinguish even in the two terminals on the wire holder, but to Caution. (3) in the two ends of the switch is disconnected in a line (the two ends of the lamp switch, for example in the) are respectively connected to the two terminal switch, switch is closed (table two, light) terminal switch test pencil nib contact time neon glow. Never put a zero line and a live wire on the two terminals of the switch, so as to avoid short circuit or even fire accident. 3, the body directly or indirectly connected with the FireWire, there will be an electric shock accident. (1) an electric shock accident occurs directly on the ground contact with a fire line (or a conductor connected with a live wire); (2) standing on the insulated stool, one hand wall, the other hand contact with the wire will cause electric shock accident; (3) standing on the insulated stool, one hand connecting wire, and the other hand touching the zero line will cause electric shock accident. In short, as long as part of the human body directly or indirectly contact the FireWire, and the other part, whether touching the ground or touching the zero line, will have an electric shock accident. 4, the following circumstances will not occur electric shock accident, but it is best not to try, so as not to misjudge the FireWire and zero line accident. (1) standing directly on the ground and touching the zero line; (2) standing on the insulated stool, only touching the live wire. The firing line on the power input side of the meter is switched to the zero line I would like to ask, the household electricity input side single-phase watt hour meter FireWire (that is, from the left is No. 1 interface) switching zero line into the port, the line into the original zero line port (exit 3) for line into electrical power. The side of the same what does the meter to analyze this problem from the meter principle, please explain in detail, thank you! Watt hour meter. The interior has a voltage coil, and a coil, and 1 core wire and interface introduced in the table to form a coil winding. In No. 2 by the output, and the introduction of line 3 and 4 interface interface directly connected to the output to take a line on its connection point into the table, a small plate and 1 terminal side {it is connected to the terminal 1 of the US board on the base of introducing voltage line form a voltage coil, two coil to drive the rotation of the turntable table, if you like that do, cause the phase of the current no current through the coil Only the zero line current loop current through the coil, so if you when normal use will not affect the degree of electrified meter, but if you put between fire and metal pipeline electric equipment, {the heating pipe, tap water pipe that is taking a zero line current coil in the pipeline is the load current} may do not leave or less flow meter, and flows through the land so that the meter or less regardless of measurement, when the current flowing through the meter about 10 percent of the rated current, the error is ten percent meter inversion will produce negative but it will increase the unsafe factors, easy to cause the person the electric shock accident, do you understand? No, for me is not important, but you can't do this in stealing, more important is not safe!! Household electric meter using a current coil (connected to the 12 line between) and a voltage coil (connected to the zero line between the 13 fire) were generated to calculate the voltage and current signals by active power meter, and the power value was obtained by adding power (mechanical table generated by eddy current and voltage of the drive coil a mechanical rotary power metering) Change the zero line, the voltage signal of opposite phase, but the current signal direction is reversed, negative positive, measurement power is still positive. Say unsafe, refers to the exchange of zero FireWire, so that the home circuit zero FireWire has been replaced, if the electrical wiring is not standard, there will be some hidden dangers In theory or in practice, it is possible Just general electric appliances control the fire line, or the switch is installed on the fire line. Only single-phase electricity is ok. Three phases are out of the question Fire line, zero line and ground wire The first use of electricity and household electric power for electricity. Power is often said that the 380 volts of electricity, used for the factory. This is a three-phase four wire line in four. Three FireWire, a zero line. Three FireWire after load such as electric motors and other electrical equipment after the zero line to form a loop, the equipment can work normally. The zero line in power plant is grounded. Household electric means we often say 220 volts of electricity is also called single-phase electric, two wires, a live wire, a zero line. After fire loads such as light bulbs and other electric appliances after the zero line to form a loop, the use of electrical appliances to work properly. The zero line here in the power plant is grounded. Electric power and household electric zero line is grounded in a power plant, but we usually say the ground wire and the zero line is not a concept. You look at the three hole power socket in our house, if it is a formal construction, where a hole is a hole line, Shiling line, a hole is here the ground wire. The whole building after gathering ground. This is only the ground often said. Most household appliances are required to ground, and the ground wire is to connect together. Why electric shock? Some people mistakenly think that the zero line is the grounding wire, household appliances and the zero line is connected together, so at the front and the zero line to form a loop at the same time and domestic appliances to form a loop, the live shell, especially in the zero line has been disconnected because of the fault and power socket grounding and bad situation more easy to get a shock. 1, zero line: in the home power, the zero line usually refers to the line from the transformer grounding body, its connection resistance has strict regulations, must be less than or equal to 0.5 ohms, so as to ensure the normal use of power equipment; 2, FireWire: is relative to the zero line, usually the home power is only one phase of three-phase electricity, its line voltage is 220 volts, it is through the zero line constitute circuit, make household appliances work; 3, we give ground: household appliances connected wire is usually in order to secure and eliminate static electricity and then ground it, the grounding resistance is not a strict requirement, is usually relatively large, no current passes zero voltage to the ground, put it as zero line appliance is unable to let the equipment to work normally the; 4, is to use the metal shell: line of electrical equipment and power supply (generator and transformer) of the grounding metal connecting the line, it requires the power supply to the electric equipment in the circuit of fuse or breaker in electric equipment, a collision shell, can in the shortest time open circuit, so as to protect the equipment and personal safety; 5, the home is not the three-phase socket socket but three wire socket, it is in the middle of the ground, both sides is used to pick up the zero line and FireWire, although there are provisions of the electrician manual left zero right fire, but we in real life is not so strict. Two wires in the lighting circuit, one called the FireWire, the other called the zero line. The difference between FireWire and zero lines is that they vary in voltage to ground: the line to ground voltage is 220V, and the zero to ground voltage is 0 The ground wire is the ground line There is no midline in the electrician The home is generally not three-phase socket socket, the middle ground is on both sides of the firing line and the zero line The home is generally not a three-phase socket socket, The middle is the ground wire, the two sides are the firing line and the zero line, the right side is the firing line (L), and the left is the zero line (N) The difference between FireWire and zero lines is that they vary in voltage to ground: the line to ground voltage is 220V, and the zero to ground voltage is 0 The center line is the line drawn from the neutral point of the generator or the power transformer. If it is not grounded, it is called the middle line. If it is properly grounded (the ground is zero potential), the center line is called zero line. Although the zero lines and ground wires of civil electric power are drawn from the same point, their respective functions are separated and can not be mixed. For example, the zero line and the live wire are the circuits of the electric circuit. They are the same as the outer shell of the electric appliance. The current flowing in the wire is the same size, so the wire diameter is the same thickness. And the ground wire is connected with the outer casing of the electric appliance. When the electric appliance is out of order, the electric current is circulated in it, and there is no current in general. Therefore, the wire diameter is much thinner. The zero line and the live wire are the electric circuit, therefore must not connect the zero line to the shell, that can cause the electric shock. Earth wire, zero line and fire line: the earth is a good conductor, and the ground wire is shorted to the ground through a buried electrode. The power transmission is in a three way, and there is a neutral line current, three-phase equilibrium of neutral line is zero, commonly known as "zero line", another feature of the zero line and the ground is in the total distribution input shorted, the voltage difference is close to zero. The three-phase three wire and the zero line have 220 voltage, can produce the electric shock to the human, commonly called "the fire line"". The installation and arrangement of electrical lines have strict standards. In practice, the assembly of ground wire, zero wire and fire wire according to standard is essential to safety. Fire line, ground wire, zero line English words Above is the ground line Earth, Wire, "E"" The following two terminals are zero line Naught Wire, "N"" Fire line Live wire, "L"". Alternating current is not a special requirement. Fire is zero International standard: Red is the line of fire, black is zero, and the color is the ground wire. All big manufacturers and standardized products follow this principle. Although the line of fire and zero line can be interchanged, it is not recommended One of the air conditioner to use 4 wires? 2.5 of the line (if it is true) should be two air conditioning also can move, 4 square lines can bring 3 air conditioning Provide a -1.5 panda wire air-conditioning wiring and switch socket wiring, single core 4 square wire used for more than 3 air conditioners, single core wire for a total of 6 square line, double color line for grounding wire. Three core sheath line 2.5 square, can be used in cabinet air conditioning. The picture shows the line of the decoration team. His construction method is: Line 4 square meters, ground and zero line with 2.5 square meters. According to the relevant standards of the industry, air conditioning phase zero line must use 4 square meters The picture shows the wrong line for the decoration team: Red 4 square meters, black and green with 2.5 square meters, and ground wire should use double color line. Generally called 4 square or 2.5 square. Specifically, 4 square centimeters or 2.5 square centimeters. Usually 1 squares and 6 currents (current strength 6 amperes) Listen to the old electrician Master said, before (last century 6~70 years) the standard is 9 per square stream, and later did not know is the progress of science and technology, or the production of fake and shoddy more, changed to 6 per square stream. 220V voltage meter, kilowatt hour is 5 per piece flow, (PH) 3.5. 3KW or 4HP can go 2.5 square line theory, if the sitting room of a 2HP, the bedroom is 1 or 1.5HP, at the same time any 2 air conditioners is no problem. Now the problem is, can not know whether the construction of the wire is not qualified manufacturers of qualified products, whether the junction is required, if the wire containing impurities or more than the virtual connection, then 2.5 square sure is not good. There is a problem, do not know how much is the home air conditioning bus 2.5 or 4 square, if 2.5 is too mean enough, then how to change the indoor line is deceiving [ Copper and aluminum carrying capacity is not the same,.2.5 square copper wire is equivalent to 4 square aluminum wire. According to conservative, every square meter 6A,.2.5 line is 15A. If you want to change 4 square meters, the air switch doesn't change or change. If your load is greater than the rated current of the air switch, the overcurrent will protect the action Because before changing the line, I saw a reminder about this aspect. So, when the electricity, especially to remind the master of construction, but the master said that the developer's home line is 2.5, and their own into 4 useless!!! [s:77] [s:77] [s:77][/quote] Rest assured the national residential design standards have been specified into the family line should not be less than 10 square, so 2.5 square line into the family situation is not possible, and if the air conditioning circuit breaker rated current is 16A, a 4 square line can only be a waste, without meaning, air conditioning capacity is too large do not burn, also such as line breaker will trip, in addition to correct wire unit is mm Could you tell me how many wires are classified by line diameter?! 1, 1.5, 2.5, 4, 10, 16, 25, 35, 50, 70, 95, 120,, 150,, 500, 185, 6, 240, 300, and 400 mm2. Air switch, also known as automatic switch, low voltage circuit breaker. The principle is: when the work current exceeds the rated current, short-circuit, loss of pressure and so on In case of automatic cut off circuit. At present, the common household switch switch with porcelain plug insurance (have been eliminated) or air switch (miniature circuit breaker with leakage protection). The home use air switch DZ series, common following models / specifications: C16, C25, C32, C40, C60, C80, C100, C120 and other specifications, which C said tripping current off current, such as C32 said take-off current of 32 A, the general installation of 6500W water heater with C32 installation 7500W, 8500W to C40 air heater. Selection key of miniature circuit breaker and leakage switch Household power shall be routed separately from lighting circuit, power supply circuit and air conditioning circuit. Thus, when one of the circuits fails, the other circuits can still be powered normally, and the normal life can not be influenced excessively. Socket circuit must be installed leakage switch, to prevent leakage of household electrical appliances caused by personal hit accident. 1, the general family should set the following circuit breaker, as far as possible to avoid a loop on the excessive use of electrical equipment and sockets. A. kitchen and bathroom lighting circuit B. bedroom and living room lighting circuit C. living room air conditioning circuit D. bedroom air conditioning circuit (an air conditioner, a loop) E. living room, bedroom socket circuit F. kitchen and toilet socket circuit 2, the general choice of socket loop leakage protector 16A/30mA, lighting circuit generally choose 10A16A miniature circuit breaker. 3, air conditioning circuit generally choose 16A25A miniature circuit breaker. 4, household distribution box switch selection 32A40A mini circuit breaker, isolating switch. 5 types of circuit breakers can use bipolar or 1PN (line + neutral) circuit breaker when the line short-circuit or leakage fault, the circuit breaker can be immediately cut off the power phase (fire) line and neutral line (zero), to ensure the safety and security of electrical equipment. 6, wall hanging air-conditioning power supply circuit can not be equipped with leakage switch.