The connectors and pins for electrical appliances in general electronic products are called plugs. Household AC power plugs and sockets, with male connectors protruding in the shape of rods or copper plates, physically inserted into female connectors with slots or recesses. Size is an important technical requirement that affects the safe use of plugs, sockets, and converters, as well as whether they meet universal interchangeability requirements to avoid accidental insertion. Unqualified dimensions can affect users' use or create hidden dangers such as poor contact and incorrect insertion. It can cause equipment damage, and in severe cases, it can lead to fire and electric shock accidents. According to the safety certification classification, UL/UL, VDE, CCC, T-MARK, SAA, BSI, PSB, SABS, PSE, SNI, UC and other North American standard plugs are manufactured according to NEMA 1-15, 5-15, 5-20, 6-15, and 6-20P plug standards. The plug with cylindrical grounding in the middle of the American standard two flat parallel plugs is subject to NEMA (American Electrical Manufacturers Association) management and UL certification. The standard for plugs and sockets in Canada is CSA C22.2 No. 42. Plugs that comply with the NEMA 5-15P output style are also used in countries such as Mexico, Japan, South Korea, Central America, Colombia, Venezuela, Ecuador, and the West Coast of South America. In developing countries, power systems are usually ungrounded. UL certified and CSA certified plugs. It can be paired with various sizes and types of cables, mainly used for data transmission, such as power servers, computer data storage systems, network equipment, and industrial equipment. Standard 15A/125VAC plugs are widely used, while high current 20A/250VAC plugs are rarely used. The American standard injection molding power cord and plug are easy to use and easy to install in medical institutions, with a dedicated medical grade plug system. On one side of the wire is an IEC-60320 connector with a rated current of 10A. 15A/125VAC maximum output rating. The equipment manufacturer requires that the power cord of the equipment be controlled by UL and CSA standard certification. In order to coordinate the changes in information technology equipment standards with IEC standards and UL amendments. UL certification (60950 and CAN/CSA C22.2 number 60950) and medical device standards (UL certification 60601 and CAN/CSA C22.2 number 60601), UL certification 60950 and CAN/CSA C22.2-60950 jointly declare that the grounding wire of the power cord must be a dual color wire, namely green and yellow. UL certification 60601 and CAN/CSA C22.2 number 60601 require grounding to be green/yellow, zero wire to be light blue, and live wire to be brown. There are indications that UL and CSA may not impose these requirements. In both cases, it is recommended to use color coded cables with polarity identification colors (brown, blue, green/yellow), and UL and CSA certification requirements are acceptable. Prior to this, some device manufacturers were able to distinguish between North American power cord polarity color codes, namely black, white, green, and international standard universal color codes, namely red, blue, green/yellow. Currently, UL and CSA certifications require equipment manufacturers to unify the identification of standard power cords (live wire brown, neutral wire blue, ground wire green/yellow)