The main material of household cables is copper core PVC insulated PVC sheathed. This type of cable is usually called copper core PVC insulated PVC sheathed flat cable (BVVB). It has a double-layer insulation sheath and is suitable for open-wire construction outside the wall. BVVB cable uses a double-layer sheath, which greatly improves the insulation performance and anti-breakage performance, but the heat dissipation performance is lower than that of plastic copper wire. Therefore, it is not recommended to bundle multiple sheathed wires together for use to avoid reducing the heat dissipation capacity, thereby extending the service life of the wires and ensuring safety1.
In addition, the materials of household cables also include bare wires and bare conductor products. These products do not have any insulation and sheathing, are purely composed of conductor metal, and are mainly used for power transmission in rural or suburban areas. Bare wire products include steel core aluminum stranded wire, copper aluminum busbar, electric locomotive wire, etc. Its processing technology mainly includes pressure processing, such as smelting, rolling, drawing, stranding/tightening stranding, etc.2.
The selection of household cables should take into account their use environment and safety performance to ensure that the cables can meet the needs of household electricity consumption. At the same time, attention should also be paid to the heat resistance, flame retardancy and environmental protection standards of the cables to ensure safe use and environmental friendliness.