File Name: types of electrical wires and cables .zip
More often than not, the terms wire and cable are used to describe the same thing, but they are actually quite different. Wire is a single electrical conductor, whereas a cable is a group of wires swathed in sheathing. The term cable originally referred to a nautical line of multiple ropes used to anchor ships, and in an electrical context, cables like wires are used to carry electrical currents. Whether indoors or outdoors, proper wire and cable installation is of paramount importance - ensuring a smooth electricity supply, as well as passing electrical inspections.
An electrical cable is an assembly of one or more wires running side by side or bundled, which is used to carry electric current. A cable assembly is the composition of one or more electrical cables and their corresponding connectors. Cable assemblies can also take the form of a cable tree or cable harness , used to connect many terminals together. The term cable originally referred to a nautical line of specific length where multiple ropes are combined to produce a strong thick line that was used to anchor large ships. As electric technology developed, people changed from using bare copper wire to using groupings of wires and various sheathing and shackling methods that resembled the mechanical cabling so the term was adopted for electrical wiring. In the 19th century and early 20th century, electrical cable was often insulated using cloth, rubber or paper. Plastic materials are generally used today, except for high-reliability power cables.
Tables of AWG wire sizes. The table below shows various data including both the resistance of the various wire gauges and the allowable current ampacity based on plastic insulation. The diameter information in the table applies to solid wires. Stranded wires are calculated by calculating the equivalent cross sectional copper area. Turns of wire is an upper limit for wire with no insulation.
Electrical cable and wires are considered as a same thing. In fact they are quite different. A wire is made of a single electrical conductor while a cable is a group or bundle of multiple wires inside a common sheathing. Both of them are used for carrying electrical current. Nowadays due to the advancement in technology, almost everything is powered by electricity. Be it indoor or outdoor, we need supply of smooth, uninterrupted electricity which is achieved by using suitable type of wires and cables. Not only the electrical sector uses cables and wires for power transmission and distribution to our house and industries, the Telecom sector also relies on various types of cables for uninterrupted data transmission.
Wires as we define here are used for transmission of electricity or electrical signals. Wires come in many forms and are made from many materials. They may seem simple but engineers are aware of two important points: -Electricity in long wires used in transmission behaves very differently than in short wires used in design of devices -The use of wires in AC circuits brings on all sorts of problems like skin effect and proximity effects. Skin Effect 3. Types of Wire Design 4.
Cable is the medium through which information usually moves from one network device to another. There are several types of cable which are commonly used with LANs. In some cases, a network will utilize only one type of cable, other networks will use a variety of cable types. The type of cable chosen for a network is related to the network's topology, protocol, and size. Understanding the characteristics of different types of cable and how they relate to other aspects of a network is necessary for the development of a successful network. The following sections discuss the types of cables used in networks and other related topics.
Figure 1. Twisted-pair cabling has emerged as the dominant network cabling scheme, contributing to the vast expansion in Ethernet use. Late in , the Institute of Electrical and Electronics Engineers IEEE published a new set of standards introducing data-capable twisted-pair cabling for use in 10 Mbps Ethernet systems. The star topology and 10Base-T technology made installing and troubleshooting Ethernet systems much easier, and it made managing them much more efficient. Since that time, twisted-pair cabling has emerged as the dominant network cabling scheme, and has contributed to the vast expansion in Ethernet use that still continues today. There are now a dizzying number of twisted-pair cable types available, corresponding to a dizzying array of standards detailing the configuration and performance specifications needed to support the increasingly faster data rates and larger bandwidths of incoming technologies. For CAT-3 cables and above, each cable type in turn comes in two flavors—as a solid-conductor cable, and as a stranded-conductor cable.
These wires are either made of solid or stranded. Most wires are round although square and rectangular forms are also used in specific applications. These wires are manufactured with or without insulation depending upon the application.
When you're installing new wiring, for example, choosing the right wire or cable is half the battle. Wiring for modern homes is quite standard, and most homes built after the mids have similar types of wiring. Any new electrical installation requires new wiring that conforms to local building codes.
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- Посылает сообщение о том, что Танкадо ликвидирован.
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