Understand the difference between cable, wire and optical fiber
1. Differences between wires and cables
In fact, there is no strict boundary between "wire" and "cable". Generally, products with few cores, small product diameter and simple structure are called wires, those without insulation are called bare wires, and others are called cables; The conductor with a large cross-sectional area (more than 6 mm2) is called a large wire, the smaller one (less than or equal to 6 mm2) is called a small wire, and the insulated wire is also called a wiring wire. This is simple and easy to understand!! The cable generally has more than 2 layers of insulation, most of which are multi-core structures, wound on the cable reel, and the length is generally more than 100 meters. The wires are generally single layer insulated, single core, 100 meters in a roll, and wireless reel.
The electric wire is composed of one or several soft wires with a light and soft protective layer; The cable is composed of one or several insulated wires, which are wrapped 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.
However, with the expansion of the scope of use, many varieties of "cable in cable", "cable in cable". So there is no need to strictly distinguish.
In daily habits, people call household cloth wires wires and power cables cables for short.
Wires and cables mainly include bare wires, winding wires, power cables, communication cables and optical cables, and electrical equipment.
2. Differences between cable and optical cable
Cable: It has large volume and weight, poor communication ability, and can only be used for short distance communication.
Optical cable: It has the advantages of small volume, weight, low cost, large communication capacity, strong communication ability, etc.
Their differences: copper core wire is inside the cable; The inside of the cable is glass fiber.
The communication optical cable is a kind of communication line that a certain number of optical fibers form the cable core in a certain way, which is wrapped with a sheath, and some are also covered with an outer sheath to realize optical signal transmission. Field tests have been carried out in Shanghai, Beijing, Wuhan and other places. Soon after, it was used as an inter office trunk line in the local telephone network. After 1984, it was gradually used for long-distance lines and began to use single-mode optical fiber. The communication optical cable has a larger transmission capacity than the copper cable, with long distance, small volume, light weight and no electromagnetic interference in the trunk section. Since 1976, it has developed into the backbone of the cable transmission lines for long-distance trunk lines, urban trunk lines, offshore and trans ocean undersea communications, as well as local area networks, private networks, etc., and has begun to develop into the field of urban user loop distribution networks, providing transmission lines for fiber to the home, broadband integrated service digital networks.
The cable is usually a rope like cable twisted by several or several groups of conductors [at least two for each group]. Each group of conductors is insulated from each other and often twisted around a center. The entire outer surface is covered with a highly insulated covering layer; In particular, submarine cable No. 1: different materials. The cable is made of metal (mostly copper and aluminum) as the conductor; The optical cable uses glass fiber as the transmission conductor. Second, there are differences in transmission signals. Cables transmit electrical signals. Optical cables transmit optical signals. Third, there are differences in the scope of application. Cables are now mostly used for energy transmission and low-end data information transmission (such as telephone). Optical cables are mostly used for data transmission
3. Difference between cable and optical fiber
Cable is generally considered as a conductor made of one or more mutually insulated conductors wrapped with insulation and protective layer, which transmits power or information from one place to another. In a broad sense, it refers to a device that uses metal as a medium to transmit electrical signals.
By definition, cables are used to conduct electricity.
Optical fiber, short for optical fiber, is a fiber made of glass or plastic, which can be used as a light transmission tool. The transmission principle is' total reflection of light '.
Generally, the terms optical fiber and optical cable are confused. Most optical fibers must be covered by several layers of protective structures before use, and the covered cables are called optical cables. The protective layer and insulating layer of the outer layer of the optical fiber can prevent the damage of the surrounding environment to the optical fiber, such as water, fire, electric shock, etc. Optical cables are divided into: cable sheath, aramid fiber, buffer layer and optical fiber. Optical fiber is similar to coaxial cable except that there is no mesh shield. At the center is a glass core that transmits light.
In fact, there is no strict boundary between "wire" and "cable". Generally, products with few cores, small product diameter and simple structure are called wires, those without insulation are called bare wires, and others are called cables; The conductor with a large cross-sectional area (more than 6 mm2) is called a large wire, the smaller one (less than or equal to 6 mm2) is called a small wire, and the insulated wire is also called a wiring wire. This is simple and easy to understand!! The cable generally has more than 2 layers of insulation, most of which are multi-core structures, wound on the cable reel, and the length is generally more than 100 meters. The wires are generally single layer insulated, single core, 100 meters in a roll, and wireless reel.
The electric wire is composed of one or several soft wires with a light and soft protective layer; The cable is composed of one or several insulated wires, which are wrapped 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.
However, with the expansion of the scope of use, many varieties of "cable in cable", "cable in cable". So there is no need to strictly distinguish.
In daily habits, people call household cloth wires wires and power cables cables for short.
Wires and cables mainly include bare wires, winding wires, power cables, communication cables and optical cables, and electrical equipment.
2. Differences between cable and optical cable
Cable: It has large volume and weight, poor communication ability, and can only be used for short distance communication.
Optical cable: It has the advantages of small volume, weight, low cost, large communication capacity, strong communication ability, etc.
Their differences: copper core wire is inside the cable; The inside of the cable is glass fiber.
The communication optical cable is a kind of communication line that a certain number of optical fibers form the cable core in a certain way, which is wrapped with a sheath, and some are also covered with an outer sheath to realize optical signal transmission. Field tests have been carried out in Shanghai, Beijing, Wuhan and other places. Soon after, it was used as an inter office trunk line in the local telephone network. After 1984, it was gradually used for long-distance lines and began to use single-mode optical fiber. The communication optical cable has a larger transmission capacity than the copper cable, with long distance, small volume, light weight and no electromagnetic interference in the trunk section. Since 1976, it has developed into the backbone of the cable transmission lines for long-distance trunk lines, urban trunk lines, offshore and trans ocean undersea communications, as well as local area networks, private networks, etc., and has begun to develop into the field of urban user loop distribution networks, providing transmission lines for fiber to the home, broadband integrated service digital networks.
The cable is usually a rope like cable twisted by several or several groups of conductors [at least two for each group]. Each group of conductors is insulated from each other and often twisted around a center. The entire outer surface is covered with a highly insulated covering layer; In particular, submarine cable No. 1: different materials. The cable is made of metal (mostly copper and aluminum) as the conductor; The optical cable uses glass fiber as the transmission conductor. Second, there are differences in transmission signals. Cables transmit electrical signals. Optical cables transmit optical signals. Third, there are differences in the scope of application. Cables are now mostly used for energy transmission and low-end data information transmission (such as telephone). Optical cables are mostly used for data transmission
3. Difference between cable and optical fiber
Cable is generally considered as a conductor made of one or more mutually insulated conductors wrapped with insulation and protective layer, which transmits power or information from one place to another. In a broad sense, it refers to a device that uses metal as a medium to transmit electrical signals.
By definition, cables are used to conduct electricity.
Optical fiber, short for optical fiber, is a fiber made of glass or plastic, which can be used as a light transmission tool. The transmission principle is' total reflection of light '.
Generally, the terms optical fiber and optical cable are confused. Most optical fibers must be covered by several layers of protective structures before use, and the covered cables are called optical cables. The protective layer and insulating layer of the outer layer of the optical fiber can prevent the damage of the surrounding environment to the optical fiber, such as water, fire, electric shock, etc. Optical cables are divided into: cable sheath, aramid fiber, buffer layer and optical fiber. Optical fiber is similar to coaxial cable except that there is no mesh shield. At the center is a glass core that transmits light.
