The term “Internet cable” generalizes many types of cable products. Various information cables are us to transmit information. If you mean connecting to the Internet, you ne to clarify with the operator – what kind of cable should be pull along the walls. At the same time, you ne to find out the brand of the cable and the manufacturer in order to architect data determine compatible cable products.
For example, for the Internet, they use a regular Finmark TV cable, a twist pair cable, or an existing subscriber cable (the so-call “noodles”) to which zsolt koppany chief technology officer telephone is connect.
Optical cables can be laid on dicat Internet lines.
Computer cable
The term is also general.
As a rule, a twist pair cable is us to connect PCs to each other and to the server, but other information cables can also be us.
The technology of twisting two wires into a pair has been us in telephony since the last century. Due to the correctly calculat twisting pitch and the quality of philippines numbers material, the maximum spe of information transfer was achiev, compar to a standard pair telephone cable. There are quite a few types of twist pair cable depending on the number of wires, the diameter of each wire, the location of the cable, etc. Depending on the data transfer spe, the twist pair cable is divid into groups:
- Category 3 (standard telephone cable),
- Category 5 (office networks),
- Category 6 (new generation cable for replacing Category 5).
“Twist pair”, which has gain the greatest popularity in our time, is a category 5 cable made of 8 twist-pair cores, the core diameter is a minimum of 0.45 mm and a maximum of 0.51 mm.
TV cable
This is a common name for a coaxial cable with a resistance of 75 ohms.
And also “satellite cable” is a coaxial cable. Any 75 Ohm coaxial cable can be us to connect a satellite or any other antenna, and to connect to cable television. Only one thing matters – whether it is a good cable or not.
Important characteristics of coaxial cable are signal attenuation and noise immunity.
All other characteristics of the cable are aim at improving these 2 indicators and are of secondary importance. In particular, our RK brand cable is made only of copper wire (sometimes even silver-plat), but the attenuation of the RK cable will be almost four times worse than that of any current RG brand cable made of inexpensive materials: steel and aluminum. This is achiev through a special cable production technology.
Table of dependence of wire cross-section on load
When installing electrical wiring in an apartment or a private house, it is very important to choose the right wire cross-section. If you take a cable that is too thick, it will cost you a pretty penny, since its price directly depends on the diameter (cross-section) of the conductive cores. Using a thin cable leads to its overheating and if the protection fails, the insulation may melt, a short circuit may occur and, as a result, a fire may occur. The most correct choice of wire cross-section will be bas on the load, which is reflect in the tables below.
Cable cross-section
The cable cross-section is the cross-sectional area of the current-carrying core. If the core cross-section is round (as in most cases) and consists of one wire, then the area/cross-section is determin by the formula for the area of a circle. If the core has many wires, then the cross-section will be the sum of the cross-sections of all the wires in the given core.
The cross-section sizes are standardiz in all countries, and the standards of the former CIS and Europe in this part are completely identical. In our country, the document that regulates this issue is the “Rules for the Installation of Electrical Installations” or PUE for short.