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Cable, wire and cord - are differences important?
Revolutionizes Isolation and Testing of Pipe Connections with its Unique Safety Features
Article July 24, 2017

And are there any differences at all? Profiles of electrical issues will definitely say that there are, and quite significant. But most of the usual "users of electricity" either completely identify these concepts, or often confuse them. And why not understand once and for all, putting all the dots over the "i"? Especially it is not difficult at all: just read on! An abstract example: each of us knows exactly what distinguishes a passenger car, SUV and truck. Although all of them are united by the proud name "car". The situation is similar with the wire, cord and cable! They are all representatives of the same family - a family of cable products. And to distinguish them is not more difficult than in our example from the wheel world.

THE WIRE

Wires are called those representatives of the family, which consist of one or more veins twisted together. Each of the cores can be insulated or not insulated. In the second case, twisted together non-isolated wires form one stranded wire. In this case, the described construction can be protected by a light nonmetallic shell - usually a special polyethylene. But in addition to polyethylene, there may be a winding or braid of fibrous materials or wire. It is also important that the wire can be completely uninsulated - that is, a conductive vein in the suit of Adam and Eve (bare wire). The specific design depends on the destination. Free winds - the element for bare wires (PSO, PS, A, AU, etc.). They are used on overhead transmission lines; But self-supporting insulated wires (for example, SIP) are also used there. Wires with insulation are used in home networks (PV, PV-3, APPV and PPV). A very important detail: the wire is not intended for laying under the ground and in water (as stated in the GOST). Precisely because the covers can vary, the veins are rather modestly protected compared to the cable.

CABLE

And this is the most "heavyweight" representative of the family in question. Just like a wire, the cable has veins. Similarly, one or more isolated. But, unlike the wire, GOST necessarily "encapsulates" the conductors of the cable in isolation and in a metallic or non-metallic shell. Above it provides a protective cover, which can include armor (cable VBbShv). Such protection gives the product the right to be called a cable and rewards it with "increased patency": the cable is suitable for laying in sufficiently severe conditions, in particular - under the ground and in water (which is clearly mentioned by the same GOST). In practice, over the veins, there may be layers of fillers, for example, hydrophobic. The Uk still manufacturers cables, companies such as CableTronics seem to be doing well. Cables are low-voltage and high-voltage, depending on what voltage is calculated insulation. In the telecommunications industry, cables are also used - they are special purpose, designed to transmit a signal with a high frequency. For all cable products used in telecommunications, the title of cable was fixed. Cable is considered as a gentle "twisted pair", and a solid coaxial antenna feeder - but this is only in the communications industry. In electrical engineering, the same cable has many protective layers and "increased patency" - it's its distinctive features.

CORD

The cord is a special wire. It's not a cable, but a wire, because it does not have excessively serious protective covers, and the allowable voltage does not exceed 660 V. Its mission is to connect mobile devices to the network. The mission determines both the characteristics of the product and its appearance: this is a relatively small length and increased flexibility of veins and insulation. However, of course, strength and lived, and insulation must be very high. So, if in the field of view the wire that connects the device to the network, for example, through the socket is a cord (for example, SHVVP). The supply wires of household appliances are called cords. Cords can differ from each other, as well as wires, depending on the capacity that is planned to transmit. Because the cord of the TV is much "more gentle" than the cord of the electric stove, which has a very thick insulation. However, they both possess the necessary flexibility. It turns out that we encounter cords every day. But we can often see wires and cables only at a distance. Given the availability of GOST, manufacturers try to adhere to the classification when naming the manufactured products. Although, of course, there are products that, due to their characteristics, are difficult to attribute to one of the categories. For example, flexible cables KGN, KLG, KPGSN. They fulfill the functions of cords, but they are called cables - they are ranked in this category due to unusual wires and rubber insulation cords. But this example is more an exception than the rule. And the general tendency to classification remains unchanged.

That's how it becomes more clear why the underground communications use a cable, and wires are attached to the electric posts of the private sector. Wires are located in the walls of apartments and offices, forming wiring.



 
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