3 Cable routing in the trenches requires the cable trenching to be considered for segmental drainage. The bottom of the trench should have a good grade of scattered water. The cover of the trench is generally covered with reinforced concrete, and the cable trenches that are often required to be opened indoors are generally used. The entire cable trench of the steel cover shall be provided with a continuous grounding wire. The two ends of the grounding wire and the grounding pole shall be connected to the grounding wire. The grounding wire may be 4CK 4 flat steel (minimum section not less than 80mm2), ditch The inner metal members are all hot dip galvanized. When the cable is laid horizontally on the bracket, the terminal turns and both sides of the cable joint must be fixed. The horizontal spacing of the cable bracket is 0.8m, and the vertical spacing is 1m. The cable laid on the bridge should be padded with elastic material. The cable shall be left at both ends of the bridge and the expansion joint to prevent the cable from being damaged due to structural expansion and contraction. When the length of the cable is less than 30m, the inner diameter of the straight protection pipe shall not be less than 1.5 times the outer diameter of the cable; One bend is not less than 2 times; when there are two bends, it is not less than 2.5 times. When the length of the cable protection tube is more than 30m, the inner diameter of the straight-line protection tube is not less than 25 times the outer diameter of the cable. When the cable is too long, a hand hole or a manhole should be provided. The bending angle of the steel pipe laying is generally not less than 90. The bending radius is not less than 6 times the straight length of the steel pipe. When the condition permits, the diameter of the steel pipe can be 10 times. When the pipe is laid only when there is only one bend, it can be 4 times when the steel pipe is connected with the bundle. It must be firmly coated with anti-corrosion grease, and the steel pipe at both ends of the bundle should have a reliable electrical connection. The nozzle must be smooth, free of burrs, and clean inside the tube without impurities. When pre-buried, various types of protective pipe nozzles use corks to block the nozzles to prevent debris from entering the tubes. Wires are not allowed to have joints or scratches in the pipe. After the wires are passed through the pipe, they are wrapped with insulating cloth or plastic sleeves. It is strictly forbidden to wear wires of two different specifications in the same pipe. 4 Cable overhead laying requirements Cable overhead laying is a different method than conventional cable laying because it is affected by special reasons such as other underground pipelines or municipal facilities, and it is not possible to lay cables underground or use general overhead. In the case of the line, the section of the steel strand used for laying the cable overhead should be selected according to the load and mechanical strength of the material in the cable. The minimum section is not less than 10mm2, and the steel strand and cable fixing parts should be hot-plated. The distance between the fixed points of the cable on the steel hinge line should be less than 0.75m; the distance between the fixed points of the control cable should be less than 0l6m. The distance between the cable line and the heat pipe should be greater than 1m; when the net distance is less than or equal to 1m, then The distance between the insulated cable and the non-thermal pipe should be greater than 0.5m. When the net distance is less than or equal to 0.5m, take measures to prevent the cable from being mechanically damaged. The overhead cable is led from the pole. When entering the ground, a 2.5m long protective tube is applied to the ground and fixed firmly. The root of the protective tube should extend into the underground 0l2m. LED Outdoor Lighting is the name of the lighting is exposed in the outdoor lighting. Usually with the surrounding roads, landscapes, buildings combined lighting design and installation, so as to achieve its functional and artistic unity.
LED Outdoor lighting, including street lamp, wall lamp, road lights, landscape lights (Chinese lights, fireworks lights, cherry lights, etc.), lawn (stainless steel grass lamp), buried lights, wall lights, outdoor spotlights, Wall lights and so on.
Many domestic residential use of led outdoor lighting (according to tree lights, lights, etc.) are 220V high-pressure lights, in the event of leakage or damage is easy to hurt people, with the relative in foreign countries have been thoughtful in this regard, most of the led outdoor lightings through the transformer buck, to control it within the human safety voltage, so as to ensure safety. LED Outdoor Lighting LED Outdoor Lighting,Energy Saving LED Outdoor Lighting,Waterproof LED Outdoor Lighting Shenzhen Mingxue Optoelectronics CO.,Ltd , https://www.led-lamp-china.com
In addition, some Outdoor LED Garden Light appropriate use of glass products, some people think that glass is also outdoor lighting safety instability in one of the factors, but experts believe that good quality glass (especially special glass) even if the damage to people's damage is also very Small, if the developers can focus on the use of building materials, willing to use the cost of good materials, can greatly improve the safety factor.
