This circular national standard three pole power plug is strictly produced in accordance with the national mandatory electrical standards GB 1002 and GB 2099.1. It has passed the domestic 3C mandatory safety certification and is compatible with domestic 220V/50Hz civil and commercial power supply systems. It is a dedicated power supply access component for metal shell electrical equipment, relying on a complete grounding protection structure to greatly improve the electrical safety factor. It is widely used in various household and commercial high-power electrical equipment.

All pin sizes, inter electrode spacing, and electrical rated parameters of the product strictly comply with national standards and specifications. The mainstream rated specifications are 10A/250V, with full specification universal interchangeability. It can smoothly connect to all compliant wall sockets, power strip sockets, and extension line sockets in China, avoiding adaptation problems and safety hazards caused by non-standard parts such as misalignment, excessive contact gap, and virtual connection heating from the root. The plug adopts a national standard three pole structure, with two parallel flat pins carrying the live and neutral wires respectively. The length of the grounding pin arranged diagonally is significantly longer than that of the conductive pin, forming a safety mechanism of "grounding first connected, power-off and then disconnected": when inserted into the socket, the grounding circuit is first connected, and when pulled out, the grounding circuit is finally disconnected. When the metal shell of the supporting electrical appliance has a leakage fault, the grounding pin can instantly introduce the leakage current into the ground, avoiding electric shock accidents when the human body touches the metal shell. It is an essential safety accessory for a type of electrical appliance with a metal shell. The overall layout of the pins is equipped with a dedicated foolproof design, which can only be inserted into the socket in the correct polarity direction, effectively preventing equipment charging, circuit faults and other problems caused by reverse connection of neutral and live wires.

The plug adopts a rounded circular shell shape as a whole, with no sharp edges, making the insertion and removal operation easy and not easy to scratch the hands. The tail is designed with multiple circular corrugated wire protectors, forming a multi-level buffering bending structure that can evenly distribute the stress generated by wire pulling and repeated bending. When moving electrical appliances and storing wires in daily life, it can effectively alleviate the stress loss at the root of the wire, reduce the probability of internal copper wire breakage and protective sleeve cracking, and greatly extend the overall service life of the Power cord. The plug is equipped with a stable locking wire fastening structure inside, which firmly clamps the cable after it is connected. The tensile strength meets industry standards, and long-term dragging and use will not cause problems such as wire core detachment or poor contact. The overall process adopts integrated injection molding technology, and the shell is seamlessly sealed, which can prevent dust and water vapor from entering the internal conductive area, reducing the risk of oxidation and short circuit of internal components.

The conductive pins are made of high-purity copper alloy substrate and precision stamped. The surface is uniformly nickel plated with anti-oxidation treatment, which has excellent conductivity, low contact resistance, and stable temperature rise under rated load and long-term power on conditions. It is not easy to cause abnormalities such as heating, sparking, blackening, and oxidation. The plug housing is made of flame-retardant engineering plastic, with electrical insulation strength meeting the standard, excellent impact resistance, high and low temperature resistance, and can quickly self extinguish in the presence of external open flames. It can completely isolate internal charged metal parts and physically avoid the risks of electric shock and fire. The supporting power cord uses multiple stranded oxygen free copper conductors internally, with low conductivity loss and stable current carrying; The outer insulation sheath is flexible and wear-resistant, which can adapt well to different usage scenarios such as long-term indoor wiring and frequent equipment movement.

Before leaving the factory, the product undergoes multiple quality inspection processes such as insulation withstand voltage, temperature rise testing, thousands of times of insertion and extraction durability, and tensile strength testing. All performance indicators meet the requirements of national standards, and long-term use ensures stable contact and is not prone to loose or virtual connections. This national standard three pole plug is suitable for the vast majority of metal shell electrical equipment, including refrigerators, washing machines, air conditioners, electric water heaters, induction cookers, ovens, floor fans, water pumps, commercial lighting equipment, small power tools, etc. It can be used as a factory matching power cord component for the whole machine, as well as for equipment maintenance and replacement, engineering wiring, lighting fixtures, small household appliance accessories and other diverse scenarios. It is a widely used and safer standard power connection component in domestic civil and commercial low-voltage circuits.