Distinction between wires and cables


The wire is composed of one or several soft wires, which are covered with a light and soft protective layer; The cable is composed of one or several insulated wires, which are covered with a tough outer layer made of metal or rubber. Cables and wires are generally composed of three parts: core wire, insulating sheath and protective sheath. The characteristics of common cables are as follows: CEF - ethylene propylene rubber insulation, neoprene sheath, marine flame-retardant power cable. CVV -- PVC insulated, PVC sheathed marine flame retardant power cable. BV, BX, RV and RVV series wires are often used for oxygen cabin wires, among which: bv - copper core PVC insulated wire, with long-term allowable temperature of 65 ℃, minimum temperature of - 15 ℃, working voltage of AC 500V and DC 1000V, which can be fixed indoors and outdoors, and can be laid in the open or in the dark. BX -- copper core rubber insulated wire, the maximum service temperature is 65 ℃, which is applied indoors. RV -- PVC insulated single core flexible wire, the maximum service temperature is 65 ℃, the minimum service temperature is - 15 ℃, and the working voltage is AC 250V and DC 500V. It is used as the internal wiring of instruments and equipment. RVV -- copper core PVC insulated and sheathed flexible wire, which allows long-term working temperature of 105 ℃, working voltage of AC 500V and DC 1000V. It is used in wet, high mechanical protection requirements, and frequent movement and bending. In fact, there is no strict boundary between "wire" and "cable". Generally, products with few cores, small diameter and simple structure are called wires, those without insulation are called bare wires, and others are called cables; The larger conductor cross-sectional area (more than 6 mm2) is called large wire, the smaller one (less than or equal to 6 mm2) is called small wire, and the insulated wire is also called cloth wire. This is relatively simple and easy to understand!! Cables generally have more than two layers of insulation, most of which are multi-core structure, wound on the cable reel, and the length is generally more than 100m. Wires are generally single-layer insulation, single core, 100 meter roll, wireless disk. Common models of cables: VV refers to PVC insulation (the first V), PVC sheath (the second V) yjv22 refers to cross connected PVC insulation (YJ), PVC sheath (V), steel strip kaizhuang (22) model plus "Zr" or "fr" is flame retardant cable (electric wire). Add "L" to the model of aluminum wire, which is relatively simple: BVV - PVC insulated and sheathed copper core wire, BV - PVC insulated copper core wire, BYJ - copper core cross-linked polyolefin insulated wire, BVR - PVC insulated copper core wire, BX - rubber insulated copper core wire, RHF - chloroprene rubber sheathed copper core wire.
(2) The small diameter is called "line"; The larger diameter is called "cable".
(3) The simple structure is called "line"; The complex structure is called "cable".
However, with the expansion of the scope of use, many varieties of "cable in cable" and "cable in cable". So there is no need to distinguish strictly.
In daily habits, people call household cloth wires wires wires and power cables for short.
Wires and cables mainly include bare wires, winding wires, power cables, communication cables and optical cables, and electrical equipment.