In this era of power and energy, every household has installed various electric fittings. Such as electric wire, optical wire, optical fiber and electric cable. But do you know their respective uses? And do you know the differences between electric wire, optical wire, optical fiber and electric cable? Here I will share what I know with everybody.
Electric cable usually consists of several or several sets of wires. Specifically, it has two different definitions. Frist, it made of one or more insulated conductors and an outer insulating protective layer to transfer power or information from one location to another. Another, It is usually cable that is twisted from several or several sets of wires (at least two in each set). Each set of wires is insulated from each other and often twisted around a center. The entire outer bread has a height. Insulated overlay. The cable has the characteristics of internal energization and external insulation.
Electric cable also has different types, such as power cable, control cable, compensation cable and so on. They are composed of single or multiple strands of wire and insulation to connect circuits, electrical appliances, etc.
According to the system of photovoltaic power station, the cable can be divided into DC cable and AC cable. It is classified according to the application and environment as following:
(1) A series cable between components and components.
(2) Parallel cables between the strings and their strings to the DC distribution box (combiner).
(3) Cable between DC distribution box and inverter.
The above cables are all DC cables. They are widely laid outdoors. They need to be protected from moisture, sun, cold, heat and UV. In some special environments, chemical substances such as acid and alkali should be protected.
② AC cable
(1) Connecting cable from inverter to step-up transformer.
(2) Connecting cable from a step-up transformer to the power distribution unit.
(3) The connection cable of the power distribution device to the grid or the user.
This part of the cable is an AC load cable, and the indoor environment is laid more. It can be selected according to the general power cable selection requirements.
In fact, there are no strict boundaries between "wires" and "cables." Generally, a product with a small number of cores, a small product diameter, and a simple structure is called a wire, a non-insulated wire is called a bare wire, and the other is called a cable; a conductor having a large cross-sectional area (greater than 6 square millimeters) is called a large wire. Small (less than or equal to 6 square millimeters) is called a small wire, and insulated wire is also called an Electric wire.
What is the optical wire? When the phone converts the acoustic signal into an electrical signal and transmits it to the switch via the line, the switch transmits the electrical signal to the photoelectric conversion device (converts the electrical signal into an optical signal) and transmits the signal to another photoelectric conversion device (the light is transmitted) The signal is converted into an electrical signal), and then to the switching device, to the other phone to answer. The line between the two photoelectric conversion devices is the optical wire. The utility model has the advantages of small volume, small weight, low cost, large communication capacity and strong communication capability. Due to a number of factors, it is only used for communication between long distances and points and points (ie, two switch room).
The inside of the electric cable is a copper core wire, but the inside of the optical wire is glass fiber. The communication optical wire is a communication line in which a certain number of optical fibers are formed into a cable core in a certain manner, and a sheath is sheathed, some are also covered with an outer sheath to realize optical signal transmission. The cable is usually made up of several or several sets of wires (at least two in each group). Each set of wires is insulated from each other and often twisted around a center. The whole bread is covered with insulators.
Totally, at first, they have material differences. The electric cable is made of metal (mostly copper, aluminum) as a conductor, but the optical wire is made of glass fiber. Second, they have the difference in the transmission signal. The electric cable transmits electrical signals. The optical wire transmits an optical signal. Finally, they have a difference in scope of application. Electric cables are now used for energy transmission and low-end data transmission (such as the telephone). Optical wires are mostly used for data transmission.
Optical fiber is a light-conducting tool realized by the principle of total reflection of light in fibers made of glass or plastic. In daily life, fiber is used as a long-distance information transmission because the conduction loss of light in the optical fiber is much lower than that of electricity conduction in the wire. But the electric cable is a wire that transfers power or information from one location to another. Broadly refers to a device that uses metal as a medium to transmit electrical signals.
Now, do you know what the differences between electric wire, optical wire, optical fiber and electric cable? Now you can choose depend on what you need to buy the electric fittings. Jecsany Electrical Equipment is a professional supplier specialized in cable lugs, cable terminals, PG clamps and etc.. Get more details about our company and products, please visit our website: https://www.jecsany.com/