Wire harness 1, the definition of wire harness and the components that make up ordinary wire harness are: wires, terminals, plastic parts. In our electronics industry it means 'electronic harness'. Generally refers to low-voltage electronic wire sets. It builds a bridge of communication between two or more isolated electronic circuits, so that the current can flow, realize the functions of various electronic components, and it is an indispensable component in various electrical and electronic equipment
The composition of complex wiring harnesses should be added: tape, cable ties, casing, sheaths, stickers, etc.
Second, the home wiring harness is the main body of the circuit network, and there is no home appliance circuit without the home wiring harness. At present, whether it is high-end luxury home appliances or economical ordinary home appliances, the form of wiring harness is basically the same, which is composed of wires, plug-ins and wrapping tape. Home appliance wires, also known as low-voltage wires, are different from ordinary household wires. Ordinary household wires are copper monolith wires with a certain hardness. The home appliance wires are all copper multi-core flexible wires, some soft wires are as thin as hair, and several or even dozens of soft copper wires are wrapped in plastic insulated pipes (polyvinyl chloride), which are soft and not easy to break. Common specifications of wires in home wiring harnesses are nominal cross-sectional area of 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 4.0, 6.0 and other square millimeters of wires, each of which has a allowable load current value, equipped with different specifications of wires for different power equipment.
Simply put, single-core and multi-core are actually the difference between single and multi-share. Multi-core flexible wire has a thinner diameter than single-core hard wire. , the current has a skin effect, and the transmission current point capacity is relatively large when the cross-sectional area of the single strand is equal, and the heat generation must be greater than that of the single strand. The multi-strand wire is soft and easy to operate, and the hardness of the single core is not easy to operate. Single-core hard wire, peeling off the insulation skin is a solid copper wire, the cross-sectional area is generally 1.5mm2, 2.5mm2, 4mm2. Regarding why the material uses copper, not aluminum, the reasons: large internal resistance and power consumption, small ampacity, poor tensile strength, easy to oxide layer, short service life.
Therefore, the electrical device uses multi-core wires, just like the wiring harness used by our cooling fan is multi-core wires, like household TVs, its power cord is also multi-core wires.