How many wires and cables?

The number of wires and cables refers to the number of wires that are insulated from each other inside the insulation sheath. The number of wires and cables is the number of cores. If they are not insulated from each other, the number of wires and cables is the number of cores. Two-core refers to two insulated wires wrapped together, which are generally used for household electricity within 220V. The 4-core is three-phase four-wire system, with three live wires and one zero wire.

Wire and cable differentiation

The wire is composed of one or several flexible wires, wrapped with a light and soft protective layer; The cable is composed of one or several insulated wrapped wires, which are then wrapped with a tough outer layer made of metal or rubber. Cables and wires are generally composed of core wire, insulating sheath and protective sheath.

Several cores of wires and cables

The cable is divided into several cores according to the number of wires wrapped in the rubber of the cable, one wire is one core, and the common ones are two cores, three cores, four cores, six cores, etc. 1. Two-core is used to control an electrical appliance, one is the live wire and the other is the zero wire. The switch is connected in series in the middle of the live wire to turn on or off the power supply; 2. Three-core, generally used for 380V power lines, one of which is the zero line, and the other two are the live line. The electrical appliance and the power supply are controlled by three gate switches or magnetic starters, mostly used for three-phase motors or electric welding machines; 3. Four-core, generally used for the power line of the incoming line, one is connected to the zero line, and the other three are connected to the A, B, C live wire of the transformer, and the A, B, C live wire of the transformer respectively. The power consumption at the end is roughly equal, so that the output power of the transformer is stable; 4. Six-core, usually used in a small space, has a lot of electrical appliances, so that it can control five electrical appliances. The multiple-connected switch is connected in series with the five live wires, and the five electrical appliances share a zero line.