Cable tray is a commonly used cable support equipment in modern buildings, usually made of metal or plastic, used to secure cables to walls or ceilings to ensure their safety and neatness. Choosing the right cable trays and installing them correctly is crucial for ensuring the normal use of cables. The following will introduce the selection and installation of cable trays. The selection of cable trays mainly considers the following factors: Material selection: Cable trays can be made of two different materials: metal and plastic. Metal cable trays have high strength and corrosion resistance, suitable for large cable carrying capacities and harsh environmental conditions; Plastic cable trays have the characteristics of being lightweight, economical, and insulated, and are suitable for cable support under general environmental conditions. Choose suitable materials based on the actual situation. Bearing capacity: The bearing capacity of cable trays is an important factor to consider when selecting. Select the appropriate cable tray model and size based on the required cable load and length, ensuring that it can bear the weight of the required cables and avoid problems such as deformation or breakage of the cable tray due to insufficient load-bearing capacity. Installation location: Select the installation location of the cable tray according to actual needs. Generally, cable trays are installed on walls or ceilings to support and route cables. Choose the appropriate installation location and method based on the specific situation to ensure the stability and safety of the cable tray. Environmental considerations: Select appropriate cable trays based on the environmental conditions in which the cables are located. For cables under special environmental conditions such as high humidity, strong corrosiveness, or flammability, cable trays with corresponding corrosion resistance, waterproofing, flame retardancy, etc. should be selected to ensure the safety and long-term use of the cables. The installation steps for cable trays are as follows: Measurement and marking: Firstly, it is necessary to measure the length and position of the cable tray to be installed, and mark it on the wall or ceiling. Ensure accurate labeling to facilitate subsequent installation work. Preparation tools: Prepare the corresponding installation tools according to the type and specifications of the cable tray to be installed. Common installation tools include screwdrivers, drills, level gauges, etc. Pre drilling: Drill a corresponding number of holes on the wall or ceiling according to the marked position for installing screws. Install cable tray: Align the bracket of the cable tray with the pre drilled hole and fix it to the wall or ceiling with screws. Ensure that the installation of cable trays is smooth and secure. Connection and wiring: According to the needs of the cable, fix the cable on the installed cable tray and route it. Pay attention to keeping the cables clean and avoid crossing or entanglement. Inspection and adjustment: After installation, check whether the installation of the cable tray is firm and neat, and make corrections to the areas that need to be adjusted. Ensure the stability and reliability of cable support and wiring after installation work is completed.

As an important equipment for cable laying, fire-resistant cable trays play a crucial role in ensuring the safe operation of power systems. In order to ensure the normal operation and prolong the service life of the steel fireproof bridge, we need to pay attention to the following maintenance items. Firstly, regularly inspect the installation of steel fire-resistant cable trays. Ensure that the bridge is installed firmly and there is no looseness at the connection. If any looseness is found, it should be tightened in a timely manner. At the same time, it is necessary to check whether the bridge equipment is deformed, damaged, or corroded, as well as whether there are any blockages, water accumulation, or other issues. If any malfunction is found, it needs to be repaired or replaced in a timely manner. Secondly, regularly clean the bridge equipment. Due to environmental factors, dust, oil stains, and other debris may accumulate on the surface of the bridge, which may affect the service life of the bridge and even cause it to catch fire. Therefore, we should clean the bridge every once in a while, using a damp cloth or cleaning solution. In addition, the cable laying of the bridge should be checked regularly. Check whether the cable laying complies with the specifications, whether there is any hanging overload, and whether there is any cable breakage or wear. If any problems are found in the cable laying, they should be repaired and maintained in a timely manner to ensure the normal use of the cable. It is also necessary to regularly check the grounding condition of the bridge frame. The grounding of fire-resistant cable trays is very important, which can effectively prevent static electricity and leakage in the power system, and eliminate safety hazards caused by leakage. Therefore, at regular intervals, the grounding status of the bridge should be checked to ensure that the grounding resistance meets the specifications and there are no loose or disconnected areas. In addition, regularly check the condition of the fireproof coating on the bridge frame. Fireproof coating is an important component of steel fireproof bridge frames, which can play a role in delaying the spread of fire. Therefore, it is necessary to regularly check whether the fireproof coating has peeled off, corroded, etc. If any problems are found, they should be repaired in a timely manner. In addition, it is necessary to regularly coat and protect the bridge frame. Steel fireproof bridge frames are susceptible to environmental factors such as water vapor and humidity, which can cause surface corrosion of the bridge frames. In order to extend the service life of the bridge, we can regularly carry out anti-corrosion treatment on the bridge, such as spraying anti-corrosion coatings. Need to pay attention to the environmental conditions near the bridge. Cable trays are often set up in relatively special environments, such as coastal areas, chemical plants, etc. In these special environments, cable trays may be affected by factors such as corrosion, high temperature, and humidity. Therefore, we need to regularly inspect and evaluate the impact of the environment in which the bridge is located in order to take corresponding protective measures. In summary, the maintenance of steel fire-resistant cable trays requires regular inspections of installation, cleaning of tray equipment, checking of cable laying, checking of grounding, checking of fire-resistant coatings, coating protection treatment, and attention to the environmental conditions near the trays. Only by doing these maintenance work well can we ensure the normal use and prolong the service life of the steel fireproof bridge, and ensure the safe operation of the power system.

Generally speaking, before using cable trays, we should know the accurate selection of tray types and how to use them correctly, and understand the basic knowledge of fire-resistant cable trays. The fire-resistant cable tray adopts a steel shell, double-layer fire-resistant cover plate, and is equipped with inorganic fire-resistant trough box inside. The average thickness of the insulation layer is 25mm, with a double-layer cover for ventilation and heat dissipation, and fireproof coating sprayed inside. When the fire-resistant cable tray encounters fire, the coating expands, blocking the heat dissipation holes and protecting the cables inside the tray. The fire resistance performance of the inorganic fireproof trough box has been tested for 60 minutes by the fixed fire resistance inspection institute, and the cable has no damage. The supporting structure is good and can effectively fix inorganic fireproof trough boxes. Fireproof bridge is sprayed with a layer of fireproof paint on the surface of ordinary bridge to achieve the effect of fire prevention and flame retardancy! In fact, the bridge itself will not catch fire, and only the cables may catch fire. The principle of fire prevention and flame retardancy played by fireproof paint. Let's take a look at how to correctly select fire-resistant cable trays. We have a better understanding of the differences between fire-resistant cable trays and ordinary trays, which will make it easier for people to choose fire-resistant cable trays and pneumatic ball valves.

As is well known, hot-dip galvanized cable trays are degreased and acid washed using electrolytic equipment, and then the cable trays are placed in a zinc salt solution and connected to the negative end of the electrolytic equipment. Place the zinc plate on the other side of the cable tray and connect it to the electrolysis equipment. The positive end is connected to the power supply, and the directional movement of current from the positive end to the negative end will deposit a layer of zinc on the cable tray. First, treat the galvanized cable tray, and then galvanize it, which has anti-corrosion effect.   Like heavy-duty anti-corrosion coatings, the production and painting of galvanized cable trays also involve environmental protection, as well as the occupational health of construction personnel and the public. Therefore, environmental protection is also the main development direction of galvanized cable trays. Galvanized cable trays have good environmental performance, which is mainly reflected in the following four aspects: The ingredients do not contain heavy metals such as Ph, Cr, Hg;   It belongs to thick film materials with good thixotropy. After thorough mixing, it can be painted with almost no or no thinner.   Hot dip galvanized cable trays mainly have anti-corrosion properties and surface coatings that make the cable trays more beautiful. The color selection can match the indoor design aesthetic, and galvanized cable trays can be installed outdoors.   After testing, hot-dip galvanized bridge manufacturers found that most galvanizing solvents and diluents do not contain toluene, ketones, halogenated hydrocarbons, and other toxic organic solvents.   Galvanized cable tray is a better material to replace hot-dip galvanizing and arc (hot) zinc spraying. It has a more significant role in reducing all three types of waste, reducing energy consumption, and enhancing the social benefits of environmental protection.

1、 Trough type large-span cable tray: If following the trough type large-span cable tray, it is recommended to move from outdoors to inside the building, and the slope of the tray towards the outside should not be less than one percent. 2、 Distance: Cable trays must be at least two meters above the ground, and the distance from the top of the tray to the ceiling or other obstacles must not be less than three centimeters. The cross-sectional filling rate inside the tray must not exceed 50%, and the width of the tray must not be less than one centimeter.       3、 When drawing: When drawing the cable tray route on a parallel diagram, it is necessary to clearly mark the elevation, coordinates, and size of the cable tray's lifting points, starting points, branching points, ending points, and turning points. Assuming that a cable tray laying axonometric diagram can be drawn, the material can be more accurately counted. 4、 When laying in parallel: Assuming that two sets of cable trays need to be laid in parallel at the same height, the net distance between them cannot be less than 0.6 meters. 5、 Cable tray support points: elevations, spacing, specifications, installation methods, and models of structures, columns, non-standard brackets, and support arms must be explained on the plane. Of course, different detailed drawings, slope diagrams, or single line diagrams can also be marked in sections. 6、 Setting up the ceiling: When setting up the ceiling, the opening of the slot cover must maintain a vertical clearance of 80 millimeters, and the utilization rate of the cable tray section cannot exceed half. 7、 Cable laying method and location: Generally speaking, for a large number of cable trays, vertical laying racks or vertical bending plates can be used for laying down. Only a small number of cable trays can be laid down using conduits or guide plates, and it is sufficient to indicate the laying method. 8、 Laying internal cables: If the internal cables of the cable tray are laid vertically, a tray bracket needs to be fixed at the upper end of the cable and every 1.5 meters. If it is laid horizontally, it needs to be fixed every three to five meters at the turning, beginning, and end of the cable.       9、 Clear distance: In case of crossing between electrical equipment and cable trays, the clear distance between them cannot be less than 0.5 millimeters. 10、 Cable laying on the cable tray: If the cable is laid on the cable tray, it can be left unbound, and the cable inside the tray should be as straight as possible without crossing. And the cable cannot overflow from the cable tray, and it must be fixed and tied at the entry and exit of the cable tray and the turning points.

With the development of machinery, cable trays are widely used in engineering construction. If we do not understand the issues that need to be paid attention to when installing cable trays, the installation of cable trays will be severely damaged by environmental factors, and the entire circuit will be damaged. Therefore, we need to have an understanding of the issues that need to be paid attention to when installing cable trays, so that we can better utilize them in engineering construction. We need to understand that the installation of cable trays requires a comprehensive analysis of environmental conditions. Generally, we divide environmental conditions into three types: normal environment, special environment, and corrosive environment. Different environments have different installation requirements for cable trays.       The installation of cable trays should pay attention to determining the direction of the cable tray. The installation of cable trays should be based on the direction of most cables. In outdoor environments, the direction can follow the process pipeline, while in indoor environments, it can follow beams, columns, walls, etc. Then, when installing cable trays, attention should be paid to the calculation of load. The data required for calculation is the weight per unit length of the cable on the cross-section and the total load capacity of the tray. An important point is that the installation of cable trays requires a comprehensive consideration of the first three conditions to determine the type and specifications of the tray. When selecting, parameters to be considered include the length and spacing of the columns, the level of the tray, and the length of the support arms. When fire prevention requirements are needed in the construction environment, corresponding fire-resistant cable trays can be selected. The overall fire performance requirements of fire-resistant cable trays need to comply with the requirements of national lighting regulations or standards. This is a comprehensive analysis of environmental conditions.         When selecting the load level of a cable tray, the average working load of the tray should not exceed the rated average working load of the selected cable tray. When the actual span of cable tray supports and hangers is not equal to 2m, the average working load should meet the requirements. After the cable tray is installed, these requirements should be met when connecting the grounding main circuit. The resistance connected at both ends of the cable tray should not exceed 0.00004 ohms, and the grounding hole needs to de energize the insulation layer. When cutting off the power supply, the cross-sectional area in the direction of the cable tray size should not be less than the specified value. Before choosing a cable tray, we need to pay attention to various aspects of cable tray installation. We need to choose a cable tray that is suitable for the construction environment. If we do not pay attention to the installation of cable trays, it will definitely cause certain losses. So it is important to understand and pay more attention to the issues that need to be noted during the installation of cable trays in practice.