What s the deal with a shared neutral line?

The neutral line is the neutral point of the transformer.

The drawn line forms a circuit with the phase wire to supply power to the electrical equipment, and under normal circumstances, the neutral line is repeatedly grounded with the ground wire at the neutral point of the transformer.

The double protection voltage is the potential difference between the two points.

With voltage, electrons flow through the wires 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. When an electric current passes through a wire with a thin wire diameter and high resistance, a traffic jam may occur, resulting in heat generation.

The tungsten filament of electric lamps can withstand high temperatures, and the tungsten filament emits light when it is hot.

The neutral line can be shared.

The neutral line is the line drawn from the neutral point on the secondary side of the transformer, which forms a loop with the phase wire to supply power to the electrical equipment.

Neutral line (N): Mainly used in the working circuit, the main line is drawn out after the neutral point of the transformer is grounded.

Ground Wire (PE): Not used in working circuits, only as a protective wire. Using the absolute "0" voltage of the earth, when the equipment shell leaks, the current will quickly flow into the ground, and even if there is an open circuit in the PE line, it will flow into the ground from the nearby grounding body.

After grounding from the neutral point of the transformer, the main line is drawn out and the grounding is repeated every 20-30 meters).

Rural two families sharing a neutral line will have three-phase voltage and uneven electromagnetic force, in which the output power of the motor will decrease, and it will burn out under heavy load. In a single-phase power supply circuit, the current flowing through the neutral line of the live wire is equal.

If the cross-sectional area of the neutral line is too small, the current flowing through the neutral line will increase after the neutral line is shared, which will cause the neutral line to heat up or even burn out. As long as the neutral line is drawn from the same transformer, then the neutral line can be shared; For example, the lighting and sockets of the bathroom and the kitchen are on the same circuit, which means that the bathroom and the kitchen are controlled by the same leakage, and the zero line can be shared at this time.

Precautions. 1. In terms of electricity, you must choose the best switches, sockets and wires to prevent yourself from being in danger.

2. When using the socket, try not to touch the plug with your hand to prevent the risk of electric shock.

3. Do not use a damp cloth to scrub the live equipment, because the water is conductive, so the operation is likely to cause leakage of the equipment, which will put yourself in a dangerous environment.

In the single-phase power supply circuit, the current flowing through the neutral line is equal, if the cross-sectional area of the neutral line is too small, the current flowing through the neutral line will increase after the public neutral line, which will cause the neutral line to heat up or even burn out.

A short circuit will lead to a disaster.

Because the electricity load of each family is not the same, the power has the size, causing a lot of trouble, if the power is too large, causing the line to heat, resulting in a short circuit, so it is easy to cause a disaster, the zero line is broken, not in a phase of the two live wires to form a 380V circuit Your electrical appliances can be dangerous.

Multiple loops can share a single neutral wire. Electric shock must form a circuit before it can be electrocuted. Electrocution will only occur when the live wire and neutral wire or the live wire and the ground are touched at the same time.

Because the bird's body is small, the two feet stand on a wire (fire wire or neutral wire) at the same time, the distance is small, and Ohm's law tells that the voltage between the existence and the bird's legs is small, and the current passing through the bird is also small, so the bird will not be electrocuted.

Causes and solutions of neutral line electrification1. The zero line is not well grounded, if it is well grounded, the current will flow into the ground, and it will not be detected with a pen. If the neutral line is detected to be live with an electric pen, either the neutral line is broken, or the contact is not good. But this is actually the result, not the cause of the zero line being electrified;

2. Reason: Under normal circumstances, there should be no electricity on the neutral line. Therefore, once there is electricity, it must be a sign of failure; The simplest is electromagnetic induction, and at this time, the zero line is not well grounded and fails to form a loop; Secondly, the electrical equipment leaks or the phase wire touches the shell, but the current is not large, so it has not tripped; The neutral line is electrified, and the neutral wire is definitely not well grounded; After the problem is solved, go to the cause of the device.

1. The zero line can be shared. As long as the phase wires are drawn from the same transformer, the neutral wires can be shared regardless of whether they are in phase or not.

2. The first is general lighting except for kitchen and bathroom lighting, and the zero line of this lighting is not allowed to be shared with the zero line of the socket, because they are controlled by different switches.

3. The second situation is the circuit layout of the kitchen and bathroom, at this time, the lighting sockets in the kitchen and bathroom are in a circuit, and they are controlled by a common leakage protection switch, so the zero line of the socket and the zero line of the lamp must be shared.

Electrician knowledge: What are the consequences of sharing a neutral line when multiple lines, see clearly and then answer...

Dear, hello, I am glad to answer your electrician knowledge: what are the consequences of sharing a neutral line when multiple lines are used As long as there is no consequence of leakage. It is normal that the zero line itself can be shared, and it can also be connected to the zero line busbar.

However, the circuit connected to the leakage switch, the zero line can not be shared with the zero line of other circuits, and must be separated, otherwise the leakage switch will trip, because the zero line current is detected to be missing or increased, so that the leakage tripper action and trip. Therefore, it is necessary to pay attention to the circuit independence of the zero line disturbing the early number. From the perspective of the 220V AC power supply network, the branch roads or electrical appliances are all shared live wire and neutral line.

The five circuits should have their own live wire and neutral wire (connected in parallel to the circuit), and finally connected to the power grid. Five back openings give way to five empty openings, which are relatively independent and easy to find in case of failure. In particular, the use of air opening with leakage protection can quickly cut off the line of the first circuit of fault mitigation without affecting the power consumption of other circuits.

As long as the five circuits connected from one grid share the neutral line, there are no consequences.

Dear, I'm glad to answer for you: Can two households share a zero line Answer: Dear, hello, the lighting line only controls the live line, and it is okay to share two wires.

But kitchens, bathrooms, sockets, and air conditioners cannot, because these places need to be equipped with leakage protectors. The consequence of two households sharing a zero wire is that if the zero wire is large enough and the connection is relatively reliable, then there is no consequence and it can be used safely. However, if the neutral line is a little smaller and the connection is not so firm, it is easy to burn the wire and cause the two companies to have no neutral wire, making the electrical equipment unusable.

In particular, copper and aluminum wires are most likely to be overloaded and burned.

It is not possible to connect the neutral wire with the ground wire.

Although the neutral wire is also grounded, it is fundamentally different from the grounding pin on electronic devices and three-position plug sockets. The neutral ground is the circuit ground that belongs to the power supply line, that is, the power supply ground. However, the grounding pins on electronic devices and three-position plug sockets are protected ground.

The difference between them is that when the end of the zero wire is broken or the contact is poor, the zero wire becomes the live wire, with electricity, if you connect the zero wire with the ground wire, the zero wire converted into the live wire will be transmitted to the shell of the equipment through the ground wire connected to it, so that the electronic equipment as a whole is electrified, which is easy to cause electric shock accidents.

The real ground wire is only connected to the shell of household appliances, and then connected to the ground, when the electrical appliances leakage, such as the power live wire exposed core and the electronic equipment shell contact, it will make the case electrified, if there is no or no grounding wire, then people will have electricity through the human body and electric shock accidents occur when touching these household appliances.

After the ground wire is connected, the electricity leaked to the casing will be transmitted from the ground wire to the ground, and there will be no electricity transmitted to the person when the person touches the electrical appliance, which will not cause an electric shock accident, so the ground wire is to protect the vertical ground, which is absolutely different from the zero line and cannot be connected together.