1. Difference between wire and cable
In fact, "wire" and "cable" is not a strict boundary. Usually a small number of cores, small diameter products, simple structure of the product is called wire, no insulation is called bare wire, the other is called cable; conductor cross-sectional area of a larger (greater than 6 square millimeters) is called a large wire, smaller (less than or equal to 6 square millimeters) is called a small wire, insulated wire is also known as cloth wire.
Wire is composed of one or several soft wires, wrapped in a light and soft protective layer; cable is composed of one or several insulated package of wires, and then wrapped in a tough outer layer of metal or rubber. Cables and wires are generally composed of three components: the core wire, the insulating envelope and the protective sheath.
The characteristics of commonly used cables are as follows:
CEF - Ethylene Propylene Rubber Insulated Neoprene Sheathed, Marine Flame Retardant Power Cable.
CVV - polyvinyl chloride insulation, polyvinyl chloride sheath marine flame retardant power cables.
Oxygen tank wires are often used BV, BX, RV, RVV series of wires, which: BV - copper-core PVC insulated wire, long-term permissible temperature of 65 ℃, the minimum temperature of -15 ℃, the operating voltage of 500V AC, DC 1000V, fixed laying indoors and outdoors, can be laid openly or concealed.
BX - copper rubber insulated wire, maximum operating temperature 65 ℃, laid indoors.RV - PVC insulated single-core flexible wire, maximum operating temperature 65 ℃, minimum operating temperature -15 ℃, operating voltage AC 250V, DC 500V, used for internal wiring of instruments and equipment. Used for internal wiring of instruments and equipment.
RVV--Copper core PVC insulated and sheathed flexible wire, allowing long-term operating temperature of 105 ℃, operating voltage AC 500V, DC 1000V, used for humidity, high mechanical protection requirements, often moving and bending occasions. In fact, "wire" and "cable" is not a strict boundary.
Usually a small number of cores, small diameter products, simple structure of the product known as wire, no insulation known as bare wire, the other known as cable; conductor cross-sectional area of a larger (greater than 6 square millimeters) known as large wire, smaller (less than or equal to 6 square millimeters) known as a small wire, insulated wire is also known as cloth wire so that it is simpler and easier to understand! Cables generally have more than 2 layers of insulation, most of them are multi-core structure, wound on the cable tray, the length is generally greater than 100 meters. Wire is generally a single layer of insulation, single-core, 100 meters a roll, wireless disk.
Common models of cables: VV said: PVC insulation (the first V), PVC sheathing (the second V) YJV22 said: cross-linked PVC insulation (YJ), PVC sheathing (V), steel tape mounted (22) model plus "ZR" or "FR "ZR" or "FR" for flame retardant cables (wires).
Add "L" for the aluminum wire wire models are simpler: BVV - PVC insulated and sheathed copper-core wire, BV - PVC insulated copper-core wire, BYJ - copper-core crosslinked polyolefin-insulated wire, BVR - PVC insulated copper-cored soft wire, BX - rubber-insulated copper-cored wire, RHF - neoprene rubber-cored copper-cored soft wire. (2) The smaller diameter is called the smallest wire.
(2) small diameter called "line"; large diameter called "cable".
(3) simple structure called "line"; complex structure called "cable".
But with the expansion of the scope of use, many varieties of "cable in the line", "cable in the line". So there is no need to strictly differentiate.
In the daily custom, people call the household cloth wire wire, the power cable referred to as cable.
Wire and cable mainly includes bare wire, winding wire, power cables, communication cables and fiber optic cables, electrical equipment.
2. Cable and fiber optic cable difference
Cable: when the phone will be converted into electrical signals after the line transmission to the switch, and then by the switch through the line will be directly transmitted to the other phone to answer the electrical signals, the call process transmission line is the cable. The cable is mainly copper core wire. Core diameter of 0.32mm, 0.4mm and 0.5mm points, the larger the diameter of the stronger communication capabilities; there are also the number of core wire points, there are: 5 pairs, 10 pairs, 20 pairs, 50 pairs, 100 pairs, 200 pairs, etc., the number of pairs here refers to the maximum number of users of the cable capacity; and according to the encapsulation points.
Fiber optic
Cable: its size, weight, communication ability is poor, can only be used for short-distance communication.
Fiber-optic cable: when the phone will be converted into electrical signals after the acoustic signal through the line transmission to the switch, and then the switch will be this electrical signal to the photoelectric conversion equipment (electrical signals into optical signals) through the line to another photoelectric conversion equipment (optical signals into electrical signals), and then to the switching equipment, to the other phone to listen to the phone. The line between the two photoelectric conversion equipment is the fiber optic cable. Specifically, it is only the number of cores, the number of cores are: 4