Summary of six types of Integrated Wiring System Construction Experience

Because the remaining test margin of category 6 is less than that of Category 5, there are high requirements for the construction process. During installation and design, pay special attention to how to install the category 6 Cabling System. You must note that the installation process has been completed, when laying a horizontal trough, pay attention to the structure of the horizontal trough, whether there is any metal glitch in the horizontal trough, and whether it will cause damage to the cable.

When installing the horizontal subsystem, pay attention to the tension of cables when laying cables, regardless of cat5e cabling systems or cat6 cabling systems, especially cat6 cabling systems, cable Tension cannot exceed the maximum tensile force specified by the cable manufacturer, in the TIA/EIA-568-B.1 there are provisions 4 pair 24 awg utp cable tension should be less than 110N = 25 lbf (lbs ). If the tension is too high, the twisted pair wires in the cables change to the number of layers, seriously affecting the noise resistance of the cables (NEXT. FEXT) Ability conductor and Insulation Layer Tensile damage; reduce the transmission performance of the cable-resulting in a reduction in the value of insertion loss; damage characteristic resistance (IMPEDANCE) -The return loss value is reduced. The cable tray is reasonably designed to ensure proper bending radius of the cable. Pay attention to this in the management system or the subsystem in the work zone. Installation of cables to modules and cables to the distribution frame should be carried out, note that the bending radius of the cable is too small. This will change the Layer Space of the inside line of the cable. When the tension is too large, the twisted line will be released to form a mismatch impedance, so that the return loss performance cannot meet the standard, and the six categories are more important for the return loss ). In addition, the relationship between the layer of the four pairs in the cable may also change, resulting in a reduction in noise resistance.

According to the TIA/EIA-568-B.1 specification, horizontal cabling 4 pairs of UTP cable bending radius cannot be less than 4 times the diameter of the installed cable, horizontal cabling 4 pairs of SFTP is 8 times. This type of problem often occurs in the distribution cabinet. There, a large number of cables are inserted on the plug-in panel. To keep the cables in the Distribution Cabinet neatly placed, some cables will be squeezed and bent too seriously. This is often not discovered, and even the most careful installer may inadvertently make such a mistake, thus deteriorating the performance of the wiring system. This also means that the minimum bending radius of the Guide cable is 50mm. This has an important and far-reaching impact on the catheter system originally installed in the building or requiring installation of smaller diameter cables.

The impact of cable extrusion in the inter-management subsystem is also a fault point that is easy to occur in the Six-class installation. Avoid tightening the cable so as to compress the cable. This problem mainly occurs in the case of many bundles or bundle of cables. The stress on the peripheral cables is higher than that on the harness. If the stress is too high, the twisted pair in the cable is deformed, as mentioned above, the main impact on performance is that the return loss is the main failure mode. The impact of the return loss can be accumulated, so that the impact of each tight cable belt is accumulated to the total return loss. You can imagine the worst case. There is a cable fixed on the long suspension chain and there is a cable tie every 300mm. If the fixed cable is 40 m. Then 134 of cables are squashed. When you use a cable tie, pay attention to the strength of the cable when it is out of service. It is enough for the cable to be bundled.

There is a good principle to follow here, that is, to ensure that the outer skin of the cable is not deformed when the cable is fixed with a cable. In the distribution cabinet, pay special attention to this point, because the density of cables in the distribution cabinet is very high, in order to keep the cables neat, it is possible to bundle the cables too tightly. In addition, after the plug-in panel, it is difficult to connect to the end contact, it is also easy to cause this problem, the solution to this problem is generally to use a cable hook or ring, it is best to use professional nylon straps, these devices do not compress cables, and they are easy to remove, simplifying the operation of adding cables to the cable bundle.

The cabling and channeling of subsystem cables between subsystems and management rooms in the work zone may also cause six types of installation faults. In the cat6 module connection, the outer skin of the PVC insulation layer of the cable must be in line with the IDC cabling terminal to reduce the crosstalk value of the proximity cabling. At the same time, when the cable arrives at the knife port of the IDC cabling terminal, do not destroy the twist distance of the twisted pair. The same is true for cabling and distribution racks. For cabinets, the two cabling methods of cables are horizontal trough at the top and antistatic floor-based cabling, the bending radius of the cable must be greater than 90 degrees. At the end of the cable, the outer skin of the cable shall not be removed unless necessary. The length of the skin to be removed is not specified in the TIA or ISO Cabling Standards. Remove as little as possible to ensure the twisting rate and number of layers in the cable. If the external skin removed from the IDC is too long, the NEXT and FEXT performance of the wiring system will be affected. During the installation of category 6, the tension control should be paid attention to. For cables packed with reels, the pre-pulled cables should not be too many to avoid tangle of multiple cables on the ground.

To sum up, the installation process is very important in every subsystem of the cat6 cabling system. If you do not receive the system installation training, you must not install the cat6 cabling system, when connecting modules and wiring equipment, pay attention to the vertical and horizontal distribution of the Wire cutter.

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• Topic: Integrated Wiring engineering case