Company: Henan Lubao Special Cable Co., Ltd.
Contact: Manager Su
Address: No. 13 Workshop B, Tiantan Venture Park, Huling Industrial Gathering District, Jiyuan City, Henan Province
Influence of copper core purity on wires and cables
Inside the wire, pure copper wire is generally used because pure copper has good conductivity and high heat dissipation performance. Zibo wire and cable manufacturers believe that good wires should have high copper core purity. Generally, oxygen-free copper is used, which has a bright appearance, is not easy to generate heat when used, has a low resistivity, is relatively power-efficient, and has a long life. Poor quality wires have more impurities in the copper core, larger resistivity, easily generate heat, consume more electricity, shorten the service life, and may cause a short circuit to cause a fire.
The copper-clad copper network cable refers to the network cable where the conductor is ordinary copper, that is, the bronze network cable, and an oxygen-free copper layer is plated on the outside, so it is also called a copper-clad copper network cable.
The oxygen-free copper network cable is that the conductor material is oxygen-free copper. The network cable is pure oxygen-free copper, and does not contain impurities like the bronze conductor, resulting in high resistance. The oxygen-free copper network cable contains high-purity oxygen-free copper material, which has low resistance and long transmission distance. Henan wire and cable
The resistance of the copper-clad copper network cable at 115 meters is 115 ohms. In ordinary engineering environments, it can transmit about 80 meters, such as small offices, small factories, etc. Generally, it should not be used in environments with high network requirements, especially buried. For wall network cables, do not choose all copper materials, even outdoor copper network cables cannot be used as buried network cables.
The oxygen-free copper network cable has a resistance within 30 ohms tested at 300 meters. The oxygen-free copper network cable can adapt to large, medium and small projects. If it is a national standard oxygen-free copper network cable, it can generally transmit about 120 meters to 150 meters.
The difference between wires and cables
We are all familiar with wires and cables, but there are not many people who know the difference between wires and cables. Today, Henan wire and cable manufacturers will introduce the differences between wires and cables:
1. The wire is composed of one or several soft wires, and the outer bread is covered with a light and soft sheath; the cable is composed of one or several insulated covered wires, and the outer is covered with a tough outer layer made of metal or rubber.
2. Cables and wires are generally composed of three parts: core wire, insulation sheath and protective sheath. Henan wire and cable
3. The characteristics of commonly used cables are as follows: CEF——Ethylene-propylene rubber insulated neoprene sheath, marine flame-retardant power cable . CVV——Polyvinyl chloride insulated, PVC sheathed marine flame retardant power cable. Oxygen cabin wires often use BV, BX, RV, RVV series wires, of which: BV——copper core PVC insulated wire , long-term allowable temperature 65 ℃, minimum temperature -15 ℃, working voltage AC 500V, DC 1000V, fixed laying It can be applied indoors or outdoors. BX——copper-cored rubber insulated wire, with a maximum operating temperature of 65 ℃, applied indoors. RV——Polyvinyl chloride insulated single-core flexible cord, the highest use temperature is 65 ℃, the lowest use temperature is -15 ℃, the working voltage is AC 250V, DC 500V, used as the internal wiring of instruments and equipment. RVV——copper core PVC insulated and sheathed flexible wire, allowing long-term working temperature of 105 ℃, working voltage of AC 500V, DC 1000V, used for humid, high mechanical protection requirements, often moving and bending occasions.
4. In fact, there is no strict boundary between "wire" and "cable". Generally, products with few cores, small product diameters, and simple structures are called wires, those without insulation are called bare wires, and others are called cables; larger conductor cross-sections (greater than 6 square millimeters) are called large wires. Small ones (less than or equal to 6 square millimeters) are called small wires, and insulated wires are also called cloth wires. This is relatively simple and easy to understand !! Cables generally have more than two layers of insulation, most of which are multi-core structures and are wound around cable reels. In general, the length is generally greater than 100 meters. The wires are generally single-layer insulated, single-core, 100 meters per coil, wireless coil. Common types of cables: VV means: PVC insulation (first V), PVC sheath (second V) YJV22 means: cross-linked polyvinyl insulation (YJ), PVC sheath (V) The type of steel belt (22) plus "ZR" or "FR" is a flame-resistant cable (wire). Models with "L" as the aluminum wire are simpler: BVV--polyvinyl chloride insulated and sheathed copper core wire, BV--polyvinyl chloride insulated copper core wire, BVR--polyvinyl chloride insulated copper core flexible wire, BX --Rubber insulated copper core wire, RHF--Neoprene sheathed copper core flexible wire.