What Is The National Standard For Power Cords?

Power cords are wires that carry electrical current. Usually the way of current transmission is point-to-point transmission. Power cords can be divided into AC power cords and DC power cords according to their uses. Usually, AC power cords pass through high-voltage alternating current wires. Due to the high voltage, such wires require a unified standard to obtain safety certification before they can be officially produced. The DC line basically passes direct current with a lower voltage, so the safety requirements are not as strict as the AC line, but for safety reasons, countries still require unified safety certification. So what is the national standard for power cords?

1. Irradiation cross-linked power cable, voltage level: 0.6/1KV; executive standard: GB/T12706.1-2002. The irradiated cross-linked cable uses high-energy rays to bombard the hydrogen atoms in the molecular chain of the polymer to discharge, so the molecular chain generates voids, forming a networked macromolecular three-dimensional structure to form the cross-linked polyethylene.

2. Medium voltage XLPE insulated power cable, voltage class: 6/6KV-26/35KV; executive standard: GB/T12706.2-2002. The medium-voltage cross-linked polyethylene cable adopts a fully dry chemical cross-linking method, which greatly improves its mechanical properties, thermal aging properties and environmental stress capabilities.

Related information: Although the power cord is only an accessory for home appliances, it plays a vital role in the use of home appliances. If the power cord is broken, the entire appliance cannot be used. Household power cords should be BVV2×2.5 and BVV2×1.5 type wires. BVV is the national standard code, which is copper sheathed wire. 2×2.5 and 2×1.5 represent 2 cores 2.5mm2 and 2 cores 1.5mm2 respectively. Under normal circumstances, 2×2.5 is used as the main line and trunk line, and 2×1.5 is used as a single electrical branch line and switch line. BVV2 × 4 is used for a single-phase air-conditioning dedicated line, and a dedicated ground wire is additionally provided.

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