How to distinguish between national standard cables and non-standard cables? What are the hazards of non-standard cables?

Answer:

National standard cables are the sole compliant and safe choice for engineering and home decoration projects. Non-standard cables pose multiple safety hazards and are strongly discouraged for use.

National Standard Cable: The core specifications are strictly manufactured in accordance with the national GB standard, meeting requirements for full length, adequate cross-sectional area, pure oxygen-free copper, and flame-retardant insulation. The conductor exhibits uniform thickness, a bright and impurity-free copper core, and a robust, wear-resistant sheath. All parameters comply with standards, including regulated resistance, stable electrical performance, high-temperature resistance, and flame retardancy. The cable passes electrical inspection with ease and offers an extended warranty period.

Non-standard cables: Common practices of cutting corners include — inaccurate wire diameter specifications, insufficient cross-sectional area, and underweight meterage; copper cores contaminated with impurities or even copper-clad aluminum, resulting in extremely poor electrical conductivity; thin insulation layers made of inferior materials that are non-flame-retardant and prone to damage.

Hazards of non-standard wiring: During operation, these wires are highly prone to overheating, electrical leakage, short circuits, and frequent tripping. Prolonged use accelerates circuit aging, potentially causing fires in severe cases. Moreover, such installations fail industrial or residential inspection standards, resulting in exorbitant remediation costs later on.