The poor quality of plugs and sockets and converters is an important cause of electrical fire. The quality problems of small plugs and sockets and converters will seriously harm the personal and property safety of the consumers. Therefore, when consumers choose plugs, sockets, switches and Industrial Socket Coupler, we should pay more attention to the safety of products.

Marking

Marking is an important basis to indicate the correct installation, use and maintenance of people. It is an extremely important safety standard to ensure the safety of personal property. The plug and socket product should mark the rated current, the rated voltage, the power of the power and so on in the obvious position. In addition, the converter (a converter is a mobile electrical accessory with only one plug part and one or more socket parts). The product should use the "MAX (or maximum)" symbol to mark the rated current / power, so as to guide users to avoid overloading. Signs or symbols should be durable, clear and discernible. No easy erasable marks of silk and paper should be used.

Rated value

The rated value is the most basic electrical interchangeability and coordination parameter that ensures the normal, safe and cooperative use of the plug and socket, the converter and the connected electrical appliances. For example, the rated current of the converter should not be greater than the nominal value of the plug part. Otherwise, it may cause the user to be dangerous when the electrical appliances are selected according to the rated current of the socket, and the danger is caused by the over current heating of the plug. The minimum rating of the converter with fuse and overload protector should be equal to the rated value on the fuse and overload protector. Otherwise, there may be damage to the product.

Size

Size is an important technical requirement of whether the plug and socket and adapter can be used safely, and whether it meets the general interchangeability requirements in order to avoid misoperation. Unqualified size will affect the user to use or produce bad contact, error insertion and other hidden dangers, light is the damage to the equipment, heavy will cause fire and electric shock accidents.

Electric-shock safeguard

The protection against electric shock is a key safety index to ensure that plug and socket and converter are in normal use, even under some unexpected circumstances, which will not cause electric shock accidents for users or others. When the plug and socket completely or partially inserted timely, live parts plug should not be touched; any pin plug in plug in other accessible state, should be charged with not inserted plug socket. The plug and socket with a protective gate and a converter should be able to prevent the insertion of a single pole or probe.

Structure

The socket assemblies should be flexible enough to ensure sufficient contact pressure for plug pins. The sleeve should be corrosion resistance and wear resistance, to ensure that the plug and socket plug part good contact plug bolt; should be locked and can not rotate, otherwise it will affect the performance and insert unsafe factors; converter has flexible wire fixing device, to ensure that the cord is fixed, can withstand normal tension and torque; plug and socket when inserted, the surface between the basic should be tight, to prevent electric shock.

Power cord

The power line should have enough section to ensure that the power line does not heat up to cause insulation damage and cause short circuit, fire, leakage, and cause accidents. For example, the common 250V, 10A converter's power line section area should be greater than or equal to 0.75mm2.

Mechanical strength

Plugs and sockets should have enough mechanical strength, which can withstand various mechanical stresses caused by dropping, impact and extrusion during installation and operation. The socket with protective door should prevent unipole insertion.

Heat-resistant and combustible

High temperature has great influence on the performance of insulation materials, insulation materials under high temperature conditions, its structure and characteristics will change, this change determines the reliability of materials used, some materials will gradually soften at high temperature, the mechanical strength decreased, which will affect the quality and use of plug socket in safety. In addition, the insulating material of the plug and socket should have a certain flame retardancy. Otherwise, the product in the use of the case of fire will be out of control in case of fire.