There are 2 heads and 3 heads in the electrical socket, why don t there be 1 head?

The electrical socket has a head, but it is only used on the circuit board or inside the appliance. Household circuits need two wires to form a loop, and it is easy to be dangerous with two single-pin plugs, and from a safety point of view, it is not allowed to use a one-pin plug outside the home appliance to connect to the 220V power supply at home.

The power delivery is mostly positive and negative electrode transmission, combined with the ground wire, so there are 2 or 3 heads, and there is no 1 head.

First of all, the circuit must form a complete loop, so at least two heads are needed, one is the live wire and the other is the neutral line, and the circuit is a complete loop from the live wire to the neutral line through the load. The three heads are generally one more grounding wire to protect safety.

Because the line must have a live zero line to have electricity, but the fire zero and two wires cannot be gathered, and must be connected separately. Therefore, there are 2 plugs and 3 more ground wires.

How can there be electricity at one end, 2 ends are a live wire and a neutral line, 3 heads are a neutral wire, a live wire and a ground wire, the wire goes out and walks in to form a loop, and the live wire comes in and the zero line goes out

A circuit with one head cannot form a closed-loop loop and cannot form a current. Generally, there must be a zero line of fire, and it is safer to have a ground wire at the third end.

You can't form a loop. Only the circuit is capable of generating voltage.

You can't form a loop at one end. It seems that Alipay has this answer.

Because there is only one head current that cannot form a loop, that is, there is no power.

The circuit must have a loop, and the wires are divided into neutral wires, live wires and ground wires.

The current is to form a loop, so at least two.

One end cannot form a loop.

How does one end form a circuit, and how does electricity flow without a circuit?

You can design a plug with a live wire and a neutral wire together and you can design a 1-pronged electrical outlet.

1. The wires connected are different, the three-end plug is connected to the live wire, the ground wire and the neutral wire, and the two-end plug is connected to the live wire and the neutral wire.

2. The pins are different, the three-ended plug is three pins, and the two-ended plug is two pins.

3. The safety factor is not the same, and one of the pins of the three-ended plug is connected to the bottom line to prevent leakage and electrical burnout, but the two-ended plug does not.

4. The output current is not the same, and the output current of the three-pronged plug is a little higher than that of the two-pronged plug.

5. The use is different, the three-ended plug is mainly used in high-power electrical appliances, while the two-ended plug is mainly used in low-power electrical appliances.

Sockets generally talk about "bits" and "holes".

"Bits" refers to how many sockets there are on a panel, and "holes" refers to how many jacks there are on a panel.

You may be asking about the difference between a 2-pin socket and a 3-pin socket, appliances with two-pin plugs generally do not use metal shells, and there is no distinction between positive and negative poles; Electrical appliances with three-pin plugs generally have metal shells, or electrical appliances that need to distinguish between positive and negative poles, and the ground wire plays a role in safety protection (leakage protection).

The main difference between the three-ended plug and the two-ended plug is that the three-ended plug has an additional grounding wire, but now some electricians cut corners when installing the socket, and the grounding wire of the three-ended socket is not grounded, so there is no difference between some three-ended plugs and two-ended plugs.

One of the cores of the three-core plug is connected to the ground wire, and the other is the live wire and the neutral wire, and the grounding wire can prevent the wire from leaking and hurting people The two-core plug is only connected to the live wire and the neutral wire.

The three plugs are basically electrical appliances with relatively large power consumption. They are the live wire, the neutral wire, and the ground wire. There is no ground wire for two plugs.

Three inserts do not insert the opposite plus or minus. The two plugs can be plugged into the negative pole. However, the electrical design can be reversed.

Let's take a look at the two-end plug first, the two-end plug has only two ends, the left one is the neutral line, and the right one is the live wire. Left zero right fire. Just like the positive and negative poles of a dry battery, when the two are connected, the electrical appliances can work normally.

The three-pronged plug, which has one more ground wire than the two-pronged plug, is generally a high-power electrical appliance or an electrical appliance with a metal shell, in order to prevent leakage accidents, it is necessary to connect a ground wire on it, and it also plays a fixed role, and the triangle has stability. It is the left zero and the right fire on the ground.

Three-hole:

Above is the ground wire.

Below the left is the zero line, and the right is the live line.

Two-hole: the left is the neutral line, and the right is the live line.

Large electrical appliances, such as washing machines, need ground wires, which are safer and have leakage protection to prevent leakage from hurting people.

It can also be used without a ground wire, and sometimes the ground plug can be removed due to conditions, but it is not recommended to do so because of the lack of leakage protection.

When the three-prong plug is missing the upper head, it indicates that there is a problem with the design of the plug, which can lead to a series of problems when using the appliance. Three-pin plugs are usually used to connect ground, neutral and live wires, so if one of the headers is missing, then the circuitry in it will be affected.

A three-pin plug is no longer a three-prong plug if it lacks the upper head, as it only has two holes to use. This means that when the plug is in use, a ground wire is missing, which can lead to a series of dangerous situations when using the appliance. For example, when using a grounding plug to connect an electrical appliance, if the plug lacks a ground connection, the ground wire current will flow into the metal casing of other appliances or power supplies, causing the casing of other appliances to become electrified, and may even lead to electric shock accidents.

In addition, the head above the three-prong plug can also ensure the stability of the lead circle of the connection, and one more head can better fix the plug. A missing head means that the plug connection is not tight enough, which can lead to aging plugs, poor connections or short circuits. This can damage appliances or even cause serious problems such as fires.

In conclusion, a three-prong plug with a missing head is unsafe and can pose a serious threat to the user's life and property. Therefore, when using electrical appliances, great attention should be paid to the safety of the plug. In addition, when buying and using a three-prong plug, you should also carefully check the performance and quality of the product, and choose a plug of acceptable quality to ensure safety.