New energy cable manufacturer ---Shandong Peninsula. Whether the cable is placed under the eaves. The standard LAN cable can be used only when the cable is not directly exposed to sunlight or ultra-high temperature. It is recommended to use pipes. On the exterior wall. Avoid direct sunlight on the wall and man-made damage. Plastic or metal in pipes. If in pipes, pay attention to the damage of plastic pipes and the heat conduction of metal pipes. Overhead applications/overhead cables. Consider cable sag and pressure. What kind of bundling method are you going to adopt? Whether the cable is exposed to direct sunlight. Directly laid in underground cable trench, this environment has the smallest control range. The installation of cable trench shall be checked regularly for dryness or wetness. Underground pipelines. In order to facilitate future upgrading, cable replacement and isolation from surface pressure and surrounding environment, auxiliary pipeline is a better method. However, do not expect the pipeline to remain dry forever, which will affect the selection of cable types.
Six factors affecting the cable performance: ultraviolet ray Do not apply the cable without ultraviolet protection to the direct sunlight environment. The temperature of thermal cable in metal pipe or trunking is very high, and many polymeric materials will reduce their service life at this temperature. The water in the LAN twisted pair cable will increase the capacitance of the cable, thus reducing the impedance and causing near end crosstalk problems. The repair cost of mechanical damage and the repair of optical cable are very expensive, and at least two terminations are required at each breakpoint. Grounding If the shielding layer of the cable needs to be grounded, the corresponding standards must be followed. The total length of the route is not only between buildings, but also between buildings with outdoor LAN twisted pair cables, whose total length should be limited to 90 meters. For 100Mps or 1000Mbps networks, the laying distance cannot exceed this limit. If the laying distance is between 100m and 300m, the optical cable should be selected.
The selection of wires and cables is very important for safety. Some users do not know enough about their own electrical appliance use requirements and environmental conditions. They do not know enough about the use scope, requirements and performance of wire and cable models and often choose the wrong model. For example, the slag truck in front of the furnace in a steel plant is powered by a motor, and the temperature in front of the furnace is as high as 800 ℃ - 900 ℃. Under such environmental conditions, the plant does not know what special requirements it has for wires and cables, so it uses general rubber sheathed flexible cables filled with YC type. As a result, the use time is short, and the sheath is scorched, which not only affects production, but also wastes economy. After consultation, fire-resistant and flame-retardant cables were selected to reduce the pain of cable replacement and economic losses and ensure the normal production of the enterprise.
Some important departments, high-rise buildings, computing centers, chemical industry, personnel concentration and other occasions need to use flame retardant or fire-resistant cables with fire protection functions; The Ministry of Coal stipulates that cables used in deep coal mines must be flame retardant; There are also special performance requirements for elevator cables, welding machine cables, motor lead wires, etc.
In the actual use of these special cables with special requirements, some enterprises, especially individual enterprises, often do not know enough about them and refuse to use them; Some enterprises ignore the requirements of the Ministry of Coal Industry that cables used in deep coal mines must be flame retardant, and instead purchase general rubber sheathed flexible cables; There are also some karaoke halls and crowded places where some ordinary wires and cables without fire protection function are installed, causing great potential accidents. Therefore, the selection of cable is very important. The applicable party must consult the electrician and cable manufacturer when selecting the cable, and indicate the specific use environment and conditions to select the correct cable.
