There is already a ground wire in the meter box outside, do you still need a ground wire for the thr

Naturally, the ground wire is to ensure the safety of our life electricity, and the leakage situation is to ensure personal safety, so whether it is the socket or the meter box at your home, the ground wire must be connected.

In modern families, there are more and more household appliances and equipment, and electricity safety is also particularly important. If there is leakage of home improvement appliances and wires, the consequences are unimaginable, so we need to use ground wires when decorating to ensure the safety of ourselves and our families. So, how to play the role of the ground wire correctly?

What should I pay attention to when laying and installing?

First, the principle of the ground wire.

Grounding wire. It means that one end of the wire is connected to the shell of the electrical equipment, and the other end is connected to the ground, when the electrical leakage problem occurs, the current will be directly introduced to the ground along the ground wire and released, preventing the human body from being electrocuted. In home renovation, the grounding wire is generally referred to as the safety return route.

Due to the poor insulation performance of household appliances or the humid use environment, the shell of the electrical equipment will have a certain amount of static electricity, and in serious cases, it will also cause electric shock accidents.

Two. Precautions for grounding wires.

01. Wire inspection.

When installing the ground wire, there are certain requirements for the bending degree of the wire, and the soft copper wire is generally selected as the connecting wire, which is convenient for construction. In addition, we must carry out an overall inspection before installation, such as: check whether the wire is broken, whether the screw connection is loose, whether the elastic force of the wire hook is normal, etc., if it is found that it does not meet the requirements, it should be repaired or replaced in time to ensure the normal installation of the follow-up.

02. Turn off the power.

The purpose of the inspection is also to confirm whether the power switch is turned off on the spot, eliminate the wrong power outage, human error without power failure, and prevent the dangerous behavior of the live grounding wire, so as to protect the life safety of the personnel who install the ground wire.

03. Voltage matching.

When installing ground wires for home decoration, different voltage levels should be followed.

Choosing the same specification of wire access, which means that when you ground the wire for household appliances, you should choose the wire that matches the voltage level of the electrical equipment, and when the risk of electric shock and leakage occurs, it can ensure that the current is smoothly introduced to the ground to avoid the occurrence of electric shock danger.

In addition to the above precautions, we also need to pay attention to the selection of qualified wire products as the access to the ground wire, if you accidentally choose to inferior wire, not only can not ensure that the current is introduced to the ground, and may even cause wire overload**, resulting in significant property damage. In order to improve the safety of the circuit at home, it is recommended that you use low-smoke halogen-free flame retardant cables.

As a home improvement wire.

Regardless of whether there is a ground wire or not, if the ground end of the three-pin socket is not grounded, it means that the three-pin socket does not have a ground wire protection function.

Therefore, according to the safety standards, the ground wire hole of each three-hole socket needs to be connected to an effective wire, otherwise the electrical appliances plugged into this three-hole socket will not have ground wire safety protection.

Hello: 1, the protection zero line of the power supply line is commonly known as the ground wire. The protection neutral line is not through the meter, butIndividually connectedThere is a terminal block in the meter box.

DedicatedYellow and greenwires).

2. The old-fashioned building does not have a dedicated protection zero lineYou can't use the neutral line on the meter! A high-quality leakage protector should be installed.

Do protection.

If you look at the shell of the watt-hour meter, there will be a symbol of the grounding sign, which is the part of the grounding.

The ground wire can be connected to the unpainted water pipe of the water pipe, because the water pipe is buried in the ground and can be temporarily used as the ground wire.

Now if the new residential building is standardized, each household has a grounding location, such as our multi-storey house, or built in 2005, in the bathroom design basin area is not high from the ground, there is a special grounding box, through the top to the bottom of the wall buried in the flat iron, until the underground grounding pole. There are special tips on the lid of the box. But the decorator didn't know what was going on, so they said it was useless and sealed a lot with tiles.

The ground wire does not need to pass through the meter, and the ground wire is directly connected to the ground row of the junction box.

Hit a round steel into the ground, and then draw out a wire as the bottom line.

The reason why three ground wires should be connected in the electrical box is because in this way we can better ensure the safety of current use, and it is not easy to have short circuits or other bad power accidents, so we must pay attention to standardization when using electricity at ordinary times.

The first is connected to the equipment shell, the second is the grounding wire of the power supply incoming line and the grounding terminal of the electrical box, and the third is the grounding end of the cabinet (box) body.

<> the electrical equipment at home can work normally without installing a ground wire, because household appliances do not need this ground wire support when they work normally, and the household electricity only needs a live wire and a neutral wire, commonly known as single-phase power supply.

The electrical box grounding wire is the grounding wire for all electrical equipment, for safety.

If the grounding wire does not enter the meter, it can be destroyed by hail directly connected to the grounding terminal row (the standard meter box has it), that is, there are three incoming wires, one of which is a pure volt root (the standard is a yellow-green two-color line) is grounding, which is the current specification stipulates that the incoming line must have.

If not, hit the grounding electrode nearby, connect the grounding wire, and it is not recommended to do the wanton connection to the water pipe, there are hidden dangers.

Methods for your reference.

The first case: it is found that there are no ground wires in the whole house. In general, it is necessary to rework it all. Families cannot adopt the old law of zero protection;

The second vertical knowledge situation is that it is found that none of the residential units have imported ground wires from the outside. It is necessary to make a new pole in order to introduce the ground wire, and there are several ways to do surplus consumption.

There is no electricity on the ground wire of the distribution box at home, but there is electricity on the ground wire of the socket.

Hello, dear. When the ground wire is not connected to the ground wire in the distribution room, the ground wire will be energized due to leakage. First of all, we first check whether the ground wire is connected to the ground wire drawn out of the power distribution room, whether it is firm, and then check whether the line is short-circuited, if there is a replacement of the ground wire.

The ground resistance of the ground wire is too large, causing the ground wire to be electrified. First of all, use 50 galvanized angle steel to sharpen one end into the ground 3 meters deep, and measure the grounding resistance with a ground resistance meter, less than 10 or 4 ohms. 1.

If the ground wire in the socket in our home is open, that is, the ground wire is disconnected, or the ground resistance is much greater than the required 4, then once there is a leakage current in the ground wire, there will be a live ground wire. At this time, there is a problem with the electrical appliances or sockets in our home, which leads to the occurrence of leakage, so the leakage current at this time will flow to the earth through the ground wire under normal circumstances. Once the ground wire is open, then it is equivalent to the ground wire and the live wire in series, resulting in the ground wire being electrified.

2.If we reverse the ground wire and the ground wire at home, there will also be electricity on the ground wire when using electrical appliances, and there will be no electricity when the ground wire is not in use. But if the switch and wiring in our distribution box are correct at this time, the leakage protection switch will also trip.

Therefore, if it is found that the ground wire is charged due to the reverse connection of the neutral wire and the ground wire, but the leakage protection switch has not tripped, then we must pay attention at this time, and we must find a professional electrician to check the circuit, focusing on checking whether the leakage switch can operate effectively, and also check whether the wiring of the switch and line in the distribution box is correct. 3.In addition to the reason that the zero wire and the ground wire are reversed, there may be leakage of electrical appliances, and when the electrical leakage is leakage, the leakage current will flow to the earth through the ground wire, which will cause the leakage protection switch to trip under normal circumstances.

However, the leakage protector at this time did not trip, then there may be these reasons: the first is that the leakage protector may be bad and cannot effectively operate and protect, and the second is that the ground wire just mentioned may be an open circuit or a false ground wire. Therefore, once there is electricity on the ground wire when the socket is used, there is no power when the ground wire is not used, and the leakage protection does not trip, we must immediately find a professional electrician for inspection, and it is easy to have an electric shock accident.

Grounding can be completed by connecting the yellow-green grounding wire directly to the grounding terminal strip of the meter box. The current code stipulates that there must be three wires in the entrance line, one of which is a yellow and green two-color wire is the grounding wire.

Grounding is an electrical safety measure taken to ensure the normal operation and personal safety of electrical equipment, which is realized by connecting the metal wire with the grounding device, and the commonly used ones are protective grounding, working grounding, lightning protection grounding, shielding grounding, anti-static grounding, etc.

The grounding device introduces the leakage current, electrostatic charge and lightning current that may be generated on electrical equipment and other production equipment into the ground, so as to avoid personal electric shock and possible fire, ** and other accidents.

In a home distribution box, there are generally three wires, which are the live wire (usually red or brown), the neutral wire (usually blue or black), and the wireGround wire (usually green or yellow-green).。The function of the grounding wire is to ensure the safe use of electrical equipment, if the equipment leakage, the current will flow back to the ground through the grounding wire, reducing the harm to the human body.

The grounding wire needs to be connected to a special grounding pole or grounding coil, and at the same time, it is necessary to ensure that the grounding wire can be stably connected to the ground. Once the ground wire is connected, you can use a multimeter or test pen to check if the ground wire is connected. For safety reasons, the joints of the grounding wire should be tightly fastened and should not be loose.

If you are not familiar with the connection and grounding wire of the circuit, it is recommended to find a professional electrician for installation and maintenance.

The ground wire is marked with a yellow-green line, but the yellow-green line in the figure is used as a neutral line.

The zero line is marked in blue, and it is not clear from the diagram why the ground and zero lines are not in normal use.

Generally, the household distribution box should be made a ground wire row, and the total ground wire of the household and the various wires of the sub-circuit can be pressed to the ground wire row.

In general, for home distribution boxes, the ground wire is usually a yellow-green wire, also known as a PE wire. Before connecting the ground wire, you must first disconnect the power supply and then connect the ground wire to the ground wire of the building to ensure that the connection is secure. When wiring, the insulation layer on the terminal should be removed, and then the end of the ground wire should be neatly arranged on the terminal and fastened with screws.

Because standards and regulations vary from region to region and country, be sure to follow local industry standards and regulations when wiring. If you don't understand the wiring method or face any difficulties, it's best to ask a professional electrician to help.

Because the line is not installed with a standard layout (color), it is difficult to say, and it must be tested by a multimeter to judge.

It can be directly connected to the grounding terminal row (the standard meter box has it), that is, there are three incoming wires, one of which (the standard is yellow and green two-color wire) is grounding, which is required by the current specification for the incoming wire.

There are 6 floors of users who do not use wires.

Therefore, the ground wire can only be accident-proof If there is no ground wire, it can also be used, but it should be noted that if there is numbness in the hand when taking things, then it will be repaired.

Of course, there is another way, which is to nail a steel nail in the corner of the refrigerator, and then connect one end of the wire with a wire, and the other end to any screw wire behind the refrigerator.

The grounding wire is not through the meter, generally the power supply inlet line is separately in, connected to the meter box shell, if there is a can be connected for grounding. If there is no grounding wire, it can be connected to the ground with an angle iron or iron pipe of about 2 meters for anti-static electricity alone.

If the grounding wire is not in the meter, it can be directly connected to the grounding terminal row (the standard meter box has it), that is, there are three incoming wires, one of which (the standard is yellow and green two-color wire) is grounding, which is the current specification that the incoming wire must have.

If not, hit the grounding electrode nearby, connect the grounding wire, and it is not recommended to connect the so-called water pipes and the like, there are hidden dangers.

Hello, the meter outlet of the meter box needs to be grounded, which is an important measure to prevent leakage, short circuit, etc. The grounding method is generally by connecting the grounding wire of the meter box to the grounding column or grounding wire ring. The specific steps are as follows:

1.First of all, confirm that the grounding wire of the meter box has been connected, and the grounding wire is generally yellow-green. 2.

Locate the ground post or ground wire ring, usually near the meter box or next to electrical equipment. 3.Connect the grounding wire of the meter box with the grounding post or grounding ring, which can be connected using a tool such as a grounding clamp.

4.After confirming that the connection is firm, then carry out a power-on test to ensure that the grounding effect is good. It should be noted that the operation of the meter box meter outlet grounding needs to be carried out by professionals, and do not operate it privately to avoid safety accidents.

In addition, regular maintenance of the meter box is also very important to avoid the occurrence of failure of the cavity bucket and prolong the service life. It is recommended to ask professionals to check and maintain it regularly to ensure the safety performance of the meter box.