Poor quality of power cord plugs and sockets is an important cause of electrical fires. The quality problem of small plugs and sockets will pose a serious hazard to the personal and property safety of consumers. Therefore, it is necessary to pay attention to its safety performance when using the power cord plug to avoid electrical fires. The main factors affecting the safety performance of the power cord plug are as follows:

Sign

The sign is an important basis for instructing people to install, use and maintain correctly, and is an extremely important safety standard content to ensure the safety of personal and property. Plug and socket products should be marked with the rated current, rated voltage, power source, etc. in an obvious position. In addition, converters (converters refer to mobile electrical accessories that have only one plug part and one or more socket parts combined) products must use the "MAX (or maximum)" symbol to mark the rated current/or power. To guide users to avoid overloading. Signs or symbols should be durable and legible. Do not use silk screen and paper stickers that can be easily erased.

Rated value

The rated value is the most basic electrical interchange coordination parameter to ensure the normal, safe, and coordinated use of plugs, sockets, converters and connected electrical appliances. For example: the rated current of the converter shall not be greater than the rated value of the plug part. Otherwise, it may cause danger when the user selects electrical appliances according to the rated current of the socket, the plug is overcurrent and generates heat; the minimum rating of the converter with fuse and overload protector should be equal to the mark on the fuse and overload protector The rating. Otherwise, product damage may occur.

Size

The size is an important technical requirement related to the safe use of plugs, sockets and converters, and whether they meet the universal interchangeability requirements to avoid incorrect insertion. Unqualified size will affect the user's use or cause potential hazards such as poor contact and incorrect insertion, ranging from damage to the equipment, and serious to fire and electric shock accidents.

Protection against electric shock

Electric shock protection is a key safety index to ensure that plugs, sockets and converters will not cause electric shock accidents to users and others under normal use, and even some accidents. When the plug is fully or partially inserted into the socket, the live part of the plug should not be touched; any pin of the plug should not be able to be inserted into the live socket of the socket when the other pins are in the reachable state. Plug sockets and converters with protective doors should be able to prevent single poles or probes from being inserted.

Structure

The socket components of the socket should have sufficient flexibility to ensure sufficient contact pressure on the plug pins. The plug sleeve should be corrosion-resistant and wear-resistant to ensure good contact between the plug and the plug-in part of the socket; the plug of the plug should be locked and cannot be rotated, otherwise it will affect the insertion performance and produce unsafe factors; the converter has a flexible cord fixing device to ensure The flexible cord is fixed and can withstand normal tension and torsion; when the plug and socket are inserted, the mating surfaces should be basically tight to prevent electric shock accidents.