Differences:

1. The national standard plug is used in China, Australia, New Zealand, and Argentina, and is characterized by three flat heads;

2. The American standard plug is used in Used in the United States, Canada, Japan, Brazil, Philippines, Thailand and other countries and Taiwan, it is characterized by one round and two flat parts;

3. The British standard plug is used in Hong Kong and the United Kingdom, India, Pakistan, Singapore, Malaysia, and Vietnam , Indonesia, Maldives, Qatar and other countries and regions, it is characterized by three square heads;

4. European standard (German standard) plugs are used in Germany, France, the Netherlands, Denmark, Finland, Norway, Poland, Used in Portugal, Austria, Belgium, Hungary, Spain, Sweden and other EU countries as well as South Korea, Russia and other countries, it is characterized by two round heads;

5. The South African standard plug is mainly used in South Africa, India and Russia. , characterized by three round heads, as well as Italian standard (Italian standard) plugs, Swiss standard (Swiss standard) plugs, etc.

Extended information:

Can be divided by function:

Headphone plug, dc plug, audio plug, usb plug, video plug, microphone plug, charger Plugs, mobile phone plugs, etc. Internationally, household appliances are divided into three categories:

Category 1: Electrical appliances refer to appliances with only one layer of insulation measures. Such appliances must be equipped with leakage protectors and grounding protection (that is, three-pin plugs are required) ). Such as air conditioners, machine tools, motors, etc.

Category 2: Electrical appliances have double-layer insulation measures, and a leakage protector is required. Grounding protection is not required (that is, a two-pin plug can be used). Such as: TV, electric fan, table lamp, induction cooker, electric ceramic stove, etc.

Category 3: Electrical appliances are those that use safe voltage, generally 12-36V, such as mobile phones, laptops, etc.

Classified by safety certification:

UL/CUL, VDE, CCC, T-MARK, SAA, BSI, PSB, SABS, PSE, SNI, UC, etc.

Divided by structure:

Plugs, sockets and connectors. Plugs and sockets are generally divided into two-pole plugs and two-pole grounded plugs.

Current passes through, so I would like to tell you that as long as any electrical appliance is not in use, you must unplug it to save electricity.

For power supply products, there are usually four nouns:

1. Plug. Refers to the part that is connected to the power cord and has a male plug. The full name should be called a plug connector. For a two-pin flat plug, it is sometimes spelled duckhead in English.

2. Connector. Refers to the part that is connected to the power cord and has a female jack socket.

3. Appliance input socket (inlet). Its status is similar to 1, but it is installed on a fixed body such as electrical appliances without connecting wires, including the one installed on the socket body.

4. Socket. Its status is similar to 2, but the installation location is the same as 3. The full name should be called appliance socket.

Of these four words, we often confuse words 2 and 3. We often call those with pins plugs and those with holes called sockets, but they are actually different.

Poor quality of plugs, sockets and converters is an important cause of electrical fires. The quality problems of small plugs, sockets and converters will pose serious harm to the personal and property safety of consumers. Therefore, consumers should consider the safety of the products when purchasing plugs, sockets, converters, and switches.

Size

Size is an important technical requirement related to whether plugs, sockets and converters can be used safely and meet universal interchangeability requirements to avoid mistaken insertion. Unqualified dimensions may affect the user's use or cause hidden dangers such as poor contact and misinsertion, which may cause equipment damage at least, or cause fire and electric shock accidents at worst.

Anti-electric shock protection

Anti-electric shock protection ensures that plugs, sockets, and converters will not cause electric shock to users or others under normal use, or even in some unexpected situations. A key safety indicator. When the plug is fully or partially engaged with the socket, the live parts of the plug shall be inaccessible; any pin of the plug shall not be able to engage with the live socket of the socket when other pins are accessible. Plugs, sockets, and converters with protective doors should prevent insertion of single poles or probes.

Structure

The socket assembly should be elastic enough to ensure sufficient contact pressure on the plug pin. The plug sleeve should be corrosion-resistant and wear-resistant to ensure good contact between the plug and the socket; the plug pin should be locked and cannot rotate, otherwise it will affect the insertion performance and cause unsafe factors; the converter has a soft wire fixing device to ensure The soft cord is fixed and can withstand normal tension and torsion; when the plug and socket are plugged together, the mating surfaces should be basically tight to prevent electric shock accidents.

Power cord

The power cord should have sufficient cross-sectional area to ensure that the power cord will not heat up and damage the insulation, causing short circuit, fire, leakage, and accidents. For example: the cross-sectional area of ??the power cord of a common 250V, 10A converter should be greater than or equal to 0.75mm2.

Reference: Baidu Encyclopedia-Plug