The cables are made up of a lot of materials which consist of metals and non metals. Metal conductor and armor are a common sight in cables as well as non metallic polymer based materials for insulation, sheath and binding purposes. Cables as we all know transport electric power from the point of generation to the point of distribution and eventually to the point of consumption. Power cables are the cables used for high voltage and low voltage power transmission application, but cables are used to connect various other gadgets too. Cables can be seen on CCTV cameras, loud speakers, Internet, LAN cables and in applications like Telephones. These wires and cables are the part of the same cable family the only thing making them different from the other heavy duty cables is the construction and the application they are used in. Type and material of the cable are also different, but these cables often connect to the device with a suitable connector. These connectors can be made up of metal or a non metal like plastic. Even though these cables are a part of the cable family there are some peculiar differences which need to be understood beforehand if one wants to choose a cable for a particular application.
Cables used in various applications like CCTV, Speakers, Telephone and Internet as well as some other types of cables for e.g. Coaxial cables and Jelly filled cables are discussed in detail so that particular differences are clear to the readers. All these cables can be found online and can be bought at ease.
Coaxial cables were invented in the year 1880 by British engineer Oliver Heaviside who applied for a patent for his invention soon after. Coaxial cables sometimes known as Coax derive its name from the geometrical center present between the cable shield and the insulator. Coaxial cables are basically made up of copper and other such materials with a specific metal shield mainly used to block the interference. Coaxial cables find its utility in a cable television sector where it is used to connect the satellite antenna to the customer’s home or office. Depending on the application and the accuracy required to transmit data, twisted pair copper wire or optical fiber is stronger competitors as an alternative to these coaxial cables.
Construction of coaxial cables is fair and simple, a copper conductor wire which acts as a primary channel, an insulator which surrounds this conductor wire, a sheath made up of copper or aluminium which may have braided structure which mainly protects the wire from interference and lastly Teflon or plastic coating for protecting the cable from the outside elements.
Coaxial cables have a strong protective construction which allows them to transmit signals even if it’s weak and otherwise carry signals for a long distance too! Due to this protection offered by the elements to the cable structure the signals flowing through the cables remain enclosed inside the cable itself and electrical noise is kept away from distorting the signal. Outer shield which is made up of metal is often grounded at the connectors to shield the signals as well as keep any stray interference signal away. Coaxial cables and its electrical characteristics are of high importance for the cable to perform well. Impedance characteristics of the cable to use in a medium power environment are 50ohm and 75ohm when used in applications like antenna connections in household areas.
Types of coaxial cables: Hard-line coaxial cables have a metal shield with aluminium or copper metal and has a round structure made up of copper tubes. Tri-axial cables consist of an extra tertiary protection layer to shield the signals from outer noise. Indoor high power RF transmitters consist of Rigid line coaxial cables which contain two copper tubes which are rigid and do not bend.
Multiple standards exist for usage of coaxial cables mainly regarding the impedance values. Most wires have an impedance value of 50, 52, 75 or 93. These cables are connected with simple connectors as in the case of television applications or with complex connection having multiple coax links in customized bodies for use in specialized applications. Such coaxial cables might face issues regarding interference from outer sources. Outer signals can enter the cable through faulty insulation or when an electromagnetic field comes in contact with the shielding of the cable.
Coaxial cables find application in various fields right from home entertainment to telecommunication areas. A variety of gadgets like TV, VCR or DVD’s are interconnected by coaxial cables in household environments where as GPS devices use coaxial cables for interconnection of antennas. Cell phone towers and equipment at the base stations utilize coaxial cables and these cables are also used in wide area networks and local area network connecting applications.
Coaxial cables are used across a wide range of applications which need the transmission of signals between two gadgets. Such applications also include CCTV installations. Browse and shop for coaxial cables online.
CCTV systems are often installed in the trickiest places in residential, office or hospital buildings. Due to its placement these systems require some level of flexible cable connectors. CCTV systems basically include a camera, digital video recording and storage medium, power source, cable connectors and most importantly the cables connecting the camera and the DVR. In order to make a proper selection of cables for particular application one must be acquainted with the cables which are generally used in such systems. Two particular cables which are popularly used in CCTV installations are RG59 and RG6 cable. Basically a connection of cables and the installation of the entire system are crucial from the point of view of receiving a high quality and optimal transmission effect. Construction of CCTV coaxial cables can be understood rather easily. These cables have a Copper conductor with a foamed insulation or dielectric insulation. Cables like RG59 are 20 Awg, RG6 are 18 Awg and RG11 is 14 Awg cable type [Awg- American wire gauge]. A 75 Ohm coaxial cable is preferred for CCTV applications. The cable is made up of a solid bare copper conductor which has an electrolytic grade with a foam or dielectric covering, poly laminated tape, Copper or Aluminium braiding and finally a UV resistant PVC outermost jacket. Shop online for CCTV cables.
These cables specially involve a foamed or insulated dielectric protection where foaming is responsible to ensure reduction in capacitance and increase in velocity of electron propagation and transfer. Typically Copper metal used in these cables is required to have 95% purity and manufacturers have various cables with this purity rating or more in their portfolio. RG59 and RG6 cables have some differences which make them useful in different situations. RG59 cables are a tad bit thinner than RG6 cables whereas both cables utilize a copper core inside them. Aluminium and Copper are most definitely used as a braiding material. RG59 cables are used for cabling in interior areas of offices or houses and RG6 are used for surveillance of buildings or city surveillance. Now buy online suitable CCTV cables.
LAN cables are also called as Ethernet cables are commonly used in connection for a network. These ethernet cables are used to connect devices in LAN mainly PC and laptops, Routers and modems. Ethernet network cables are restricted length to prevent any signal losses as the length increases the ability of the cable to transmit signal reduces. LAN cables have a plug like structure at both the ends, which plugs into the appropriate port and a click sound can be heard when the plug is securely in place. Cables contain 8 wires in a pair of 2.
Generally cables used in LAN applications are called as Category 3, Category 5 and so on and are abbreviated as CAT3, CAT6, etc. As these abbreviations are generally used while identifying the cables many cables available online as well as offline are denoted similarly. The category of cable chosen for the application usually determines the speed of internet. If the internet speed is calculated in megabytes per second, then CAT 5 cable can be proper, but if the speed is in gigabytes then than CAT 5 cables or like cannot be used as these cables will slow the speed down unnecessarily.
Generally CAT3 and CAT5 cables can be considered to be obsolete as these cables can be used for low internet speed applications. CAT5e where ‘e’ stands for enhanced which does not have much difference with CAT5 cables apart from the fact that these cables are made to resist the unwanted transfer of signals. CAT6 cables are tightly wound cables and can support much higher bandwidth than CAT5 and CAT5e cables. These cables tend to be more expensive too, as they have a metal braiding helping in protecting the cable from external noise and cross talk. CAT6a where ‘a’ stands for augmented can support almost twice bandwidths than CAT6 cables and have thicker shielding due to which these can be less flexible. CAT7 and CAT7a are the most advanced cables one can buy for the network use. These cables support very high internet speeds usually denoted in gigabytes and have very good protection against noise and cross talk making them very expensive to buy. Now buy LAN cables online at a click of a button.
Telephone cables are used in telephone networks and telephone exchange for connecting the telephones inside the house or an office to the junction boxes located somewhere at road side. Telephone cables are made up of copper at its heart. A twisted pair configuration is generally used in making these cables as such configurations help in avoiding interference caused due to electromagnetic waves from surrounding gadgets as well as having a shielding layer which most definitely offers a great performance. Telephone cables are required to have a great resistance to dust, dirt and humidity as well as their needs to have resistance to UV rays. As these cables are used in indoor applications they need to be flame retardant and low smoke. Similar to Ethernet cables these telephone cables also have a plug which once inserted in the proper phone socket makes a click sound. Standard cables have a four wire configuration and sometimes unshielded with a bandwidth designed to carry voice communications.
For home use four, six or eight conductors are most commonly used and are denoted by 6P4C, 6P6C etc. where C stands for conductors. Two conductors are usually enough for home use, but four conductors are used as standard. Sometimes telephone cables are also denoted by RJ11 connector which is same as 6P4C, RJ12 which are same as 6P6C and so on where RJ stands for registered jack. Now shop online for telephone cords and telephone cables.
Cables used in the audio video systems to connect the amplifier to the speakers are called as speaker cables. Speaker cables and wires have three important properties like capacitance, resistance and inductance out of which the resistance is the most important. Cables having low resistance can allow more power to pass through and reach the speaker coil creating more sound. When the resistance is upwards of 5% of the speaker’s impedance then performance of the speaker is affected. Cross section and the length of wire are the main factors affecting the resistance; shorter wires tend to have less resistance. Similar to the length, thickness of wires also affects the resistance, thicker the wire is less would be the resistance offered. In a system wires leading to the speakers need to be of the same length to have equal impedance value. Speaker wires are made up of two or more than two conductors insulated with PVC or Teflon.
Similar to many other cables, speaker cables and cords also use a copper wire due to its low cost and lower resistance value. Copper cables need proper covering as copper if exposed to air can cause oxides which ultimately can weaken the signal from the amplifiers. Silver can have better properties as compared to copper, but cost of silver does not allow it to be used in wire making. Speaker cables have proper terminations for making connections to the speaker. The most common connection can be plugged which can be inserted into proper slots, making it a secure connection and better connection eventually turns into better output. Normal wire bending can be used to connect the wire to the speaker if the speaker systems are stationary, but if always assembled and dismantled then plugs are the best alternatives. 4mm wire gauge size is the maximum size required for the speaker systems and 1.6 or 2 mm is enough for use in home applications. Shop online speaker cables.
A cable with core filled with petroleum jelly a water resistance material can be classified as Jelly filled cables. These cables are majorly laid underground, which has polyurethane insulation material and gaps between the conductor strands are filled with petroleum jelly. Due to the presence of this jelly water and moisture is repelled and entry into the core is rejected. In case of any damage to the cable this jelly protects the integrity of the entire cable. Jelly filled cables tend to be circular in cross section throughout the cable length. Such cables are suitable for use in areas with high moisture content and are resistant to weather conditions. Jelly filled cables can find application in inter exchange or local network utility. Telephone distribution lines and telecommunication applications can use these jelly filled cables due to its inherent advantages and capabilities. Now shop for jelly filled cables online.