The 4 core security cable has been around for quite a long time. It was developed by the military around the 1920s. Unlike other cables and wires, many of which are used to power electronics, such as light bulbs and motors, coaxial cable is used to send signals to control things. These two uses have different amounts of power or electricity that need to be drawn through them. Power supply cable assemblies draw a large amount of power and therefore emit strong electromagnetic fields. These fields can interfere with the smaller fields emitted by the signal cables because they require less power. For example, fields from cables powering aircraft motors could confuse the cables responsible for signaling communications and accidentally allow bomb doors to open and inadvertently drop bombs. Therefore, a shielded, safer cable was needed, which the military developed and called 4 core security cable.
Importance of 4 core security cable
The term "4 core security cable" comes from the construction of the cable." Biaxial." This refers to the fact that there are two conductors in this cable, a center wire and a conductive foil that surrounds the center wire, and they share the same "axis. The center wire can be either copper or copper-clad steel, which is surrounded by an aluminum foil conductor, with a dielectric material between these two conductors. The dielectric is key to ensuring that the center wire and foil are equidistant from each other, providing a buffer zone that is critical to the function of the cable. Covering all of this is a braided sheath, usually made of wire material. Some models of coaxial cable have an additional metal braid. On the outside of the braid is a sheath material, usually black, which protects the cable from the environment and also protects the user from contact with the conductor during use.
Reason for using the 4 core security cable
One reason it is acceptable to use copper clad steel (CCS) in the center of the cable instead of standard pure copper is that the steel adds strength to the integrity of the wire core. ccs cable has a tensile tension or pulls strength of up to 75 pounds of force. Copper conductors, on the other hand, can only withstand 35 pounds of pulling tension. In addition, because signals are typically at very high frequencies, up to hundreds of millions of hertz (signals in the cable turn on and off at 100 million times per second), an effect called "skinning" occurs. This means that the electrons move so fast on the conductor that they move mainly on the surface or outside of the conductor.
A great deal of stability is required to ensure that the aluminum foil is at an equal distance from the centerline for proper operation. This can make the installation of coaxial cables a tricky business. There are a number of restrictions that must be observed. If the 4 core security cable is pulled, bent or stretched too far in any way, it will eventually not work properly. This is one of the reasons that harness assemblies come in handy, as they ensure that all cables and cable assemblies are protected from the environment, kept safe, and organized by bundling them into place. You can also check the Ripperonline best home CCTV security systems for better home protection.