Red, yellow and blue three wires, which is the live wire, which is the neutral line, and which is th

Usually the red is the line of fire, and the yellow-green is the ground. To be on the safe side, you need to find a tester.

Confirm the line of fire. It's a bit tricky to distinguish between the ground zeros of the two green lines. Is there a leak in the entrance gate?

If so, find a light bulb with a fire and one of the remaining wires, if it trips, that one is the ground. If it is not bright, it is also a ground wire, but it is a suspended false ground wire that has not been driven into the ground. If you don't miss the warranty, you need a digital multimeter.

AC voltage level, one meter pen connected to the water pipe, heating pipe, metal frame on the wall, etc., and the other one is connected to two wires except the live wire, which will measure the low voltage, usually the low voltage is the ground wire.

The red is the live wire, the yellow or green is the neutral line, and the blue is the ground wire.

There is no definite answer to this. There is no mandatory rule on what wire to connect due to the color of the wire. Although there are some default practices, it is common for electricians to confirm with field meters for safety. And not credulously believing in the red convention.

In general, red is filigree (brown is also used). Blue or black is the zero line. The green or yellow or yellow-green two-color line is the zero line. There are also green for the zero line.

After switching, the deloaded wire is generally not red. Probably blue, etc.

If it is a maintenance line, then it can only be accurate to say that if there is a yellow and green color line, it is very likely that it is the ground wire, and that one is the live wire to the test, if it is their own design and installation, you can connect the live wire with the red wire, in addition, the widely circulated socket wiring left zero right fire statement also try not to believe it, all to the electric tester, multimeter measurement results shall prevail, after the power off before the operation is the safest.

Red is the live wire, yellow is the neutral wire, and blue is the ground wire.

Red is fire, blue is zero, and yellow is earth.

Under normal circumstances, red is fire, blue is zero, yellow and green two-color line is ground, and some manufacturers do not use yellow-green two-color line, but directly use yellow line.

Hello, glad to answer for you. Red is the live line, blue is the zero line, and yellow and green indicate that the ground line is slippery. The ground wire does not leak electricity, and the common ones are:

Two holes, three holes. In general, in the two-hole width, the left hole is connected with the bright zero line, and the right hole is connected with the live line.

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. The live wire is the power line that transmits electricity in the circuit. The neutral line, mainly used in the working circuit, leads out the trunk line after grounding from the neutral point of the transformer.

You can use a tester to determine which one is the live wire).

Good afternoon, dear<>

The live wire, neutral wire, and ground wire are the three wires that are commonly found in circuits. They each have different roles, which are as follows:1

Firewire: Also known as phase wire or **, it is called "firewire" because it usually carries a large amount of electrical energy. FireWire is responsible for bringing alternating current from the power supply into the circuit and is the current source in the circuit.

2.Neutral wire: also known as neutral wire, its function is to stabilize the voltage in the circuit within a certain range, to ensure that the forward and reverse currents can be balanced, in the circuit to play the role of a current loop, and is usually used for grounding protection.

The neutral wire is used to return the current and provides a loop for the circuit. 3.Ground:

Also known as protective wire, it is usually grounded. It mainly plays the role of grounding the electrical shell and protecting the human body from the danger of electric shock. If the electrical appliance leaks, people are susceptible to the risk of electric shock when they are not grounded, and the leakage current is shunted to the ground after grounding, which reduces the risk of electric shock.

In addition:1Difference Between Neutral and Ground:

Both the neutral and ground wires are part of the circuit in a circuit, but they serve different purposes. The neutral wire is usually used to transmit electrical energy in a current loop, while the ground wire is mainly used to protect the human body from the danger of electric shock. Neutral and ground wires should not be used confusingly.

2.In the circuits of some countries and regions such as Europe and Australia, the ground wire and the neutral wire are usually combined together in Zen Hao, called the PEN line or N line, although the name is different, but its function and principle are consistent with the domestic zero line and ground wire. 3.

In the home circuit, the live wire and the neutral wire are the basic lines that form the electrical switches, and the use of the live wire and the neutral wire need to pay attention to insulation and protection measures, so that the people living and using electrical appliances around will not be exposed to the danger of electric shock. 4.For the heating, baking, drying, shrinking and other operations of dangerous goods, the corresponding electric heating equipment needs to be used, while for occasions such as industrial drying, tempering and annealing, it may be necessary to use higher power heating devices, so more protection and maintenance are required.

In China, power plugs are generally wired with three wires (red, green, and yellow). The yellow or green wire is the ground wire, and the red and green wires are the live and neutral wires of the alternating current.

For three-wire plugs, the purpose of each line is mainly judged by the color of its connector. Here's how:

Identifying ground wires: The green or yellow and green wires are ground wires, which are usually connected to a metal ground lug on an electrical outlet.

Judge the line of fire: If both the red line and the green line are solid lines, the red line is used as the line of fire; If the red line is solid and the green line is a line with white stripes, then the green line is the zero line and the red line is the live line.

Determine the zero line: if the red line and the green line are both solid lines, then the green line is the zero line; If the red line is a line with white stripes, then the red line is the zero line and the green line is the fire line.

The best way to do this is to use a multimeter or pen to check the polarity of the wire. Put the test tool with a metal needle at one end on any two lines of the three wires, and touch the other end with your hand to an empty space of the power plug, you can see that the line with the indicator light is the live wire, and the line with the indicator light is the zero line.

It is important to note that the power must be turned off before the plug is connected, and make sure that the power cord and plug are free of any damage and leakage. If you don't know how to properly install and wire your power supply, you can seek professional help.

In general, the wire box will be marked with the color of each wire. The red line is usually the live line, the green line or the line with yellow-green stripes is the ground line, and the yellow or pale yellow line is the zero line.

If there is no color identification, you can distinguish it by the following methods:

The line is marked by the letter L or N, where L usually indicates the live line and N usually indicates the neutral line.

Use an electroscope with an electric pen. Place the pen between two wires, if the pen is on, it means that the wire is a live wire; If the pen does not light up, it means that the wire is zero.

Use a multimeter. Turn on the circuit, select the multimeter to the measurement gear of AC voltage, measure the amount of electricity between the two wires, if there is a fluctuation, it means that this wire is a live wire; If there is no fluctuation, it means that the line is zero.

It should be noted that the wire connection must be carried out in accordance with the wiring method in the circuit diagram, and do not connect at will. If you are not familiar with the circuit diagram, it is recommended to have a professional electrician for installation and wiring. Improper circuit connections can be a safety hazard.

In general, red is the fire wire, green or blue is the zero line, and yellow or yellow and green are the ground wire. It is best to use a multimeter to detect.

Zero line of fire. The two wires in the lighting circuit, one is called the live wire, the English abbreviation L (live wire), generally red or yellow or green; The other is called the zero wire, abbreviated as n (naught wire), which is generally blue or yellow; In addition, there is an earth wire (e), which is generally yellow-green or black. The difference between the live wire and the neutral wire is that they have different voltages to the ground: the voltage to the ground of the live wire is equal to 220V; The voltage of the neutral line to the ground is equal to zero (which itself is connected to the earth).

So when one part of the person hits the line of fire and the other part is standing on the ground, and the voltage between these two parts of the person is equal to 220V, there is a risk of electric shock. On the contrary, even if a person uses his hand to grasp the zero line, if the person is standing on the ground, because the voltage of the zero line to the ground is equal to zero, the voltage between the various parts of the human body is equal to zero, and the person is not in danger of electric shock. If the live wire and the neutral wire once touched, because the voltage between the two is equal to 220 volts, and the resistance between the two contact points is almost equal to zero, the current is very large, and a huge amount of heat will be generated at the contact point of the live wire and the neutral wire, thus emitting an electric spark, and the temperature at the spark is high enough to melt the metal wire.

The regular wiring method is: left zero right grounding in the fire. (The household circuit socket should be wired according to this wiring method) Because the neutral wire itself is grounded, and the electrician feels that the wiring is repeated when the ground wire is grounded, in order to save the trouble of redundant wiring, it is rare to see the ground wire connected in the household circuit.

Blue is the zero line.

Yellow is the ground wire.

Red is the line of fire.

The red line is the power cord, which means that there is power before the circuit is connected.

The blue wire is the neutral wire, and there is no electricity until the circuit is turned on.