Power cord plugs are directly connected to the mains supply, making their safety performance critically important. All compliant plugs produced by legitimate manufacturers must pass the relevant safety certifications of their respective countries or regions, such as China’s CCC certification, the US’s UL certification, the EU’s VDE/ENEC certification, the UK’s BS certification, and Australia’s SAA certification. Certification tests include: dielectric strength testing (checking insulation integrity), temperature rise testing (ensuring temperature rise under full load does not exceed specified limits), insertion and withdrawal force testing (ensuring smooth operation and good contact), and aging testing (verifying flame retardancy and heat resistance of the plastic housing).

Uncertified, no-brand plugs often use low-quality copper strips and recycled plastics, with poor internal crimping. This can lead to excessive contact resistance, overheating, fire hazards, or broken prongs. When purchasing power cord plugs or appliances with plugs attached, always check that the product bears the appropriate certification mark, and verify its authenticity through the certification body’s official website. Safety certification is the fundamental guarantee of power cord plug quality and is directly related to electrical safety.