Regarding the installation guidance and specifications of cable trays, many masters who are engaged in electrical repairs and factory wiring often encounter them. They are indeed quite troublesome. If you are not careful during installation, you may make some mistakes, which will affect subsequent use and may even have safety hazards! Simply put, you can also say that it is a shelf that supports and protects the cable circuits – or a long strip of trough, ladder-type or pallet-type things made of metal or in some cases made of other materials. The cables are neatly placed inside, fixed on the wall, ceiling, or supported on the ground, so that the cables are in order, so that they are not messy, and are also convenient for future maintenance and search.
So what should I prepare before installing? You can't be careless, you have to think of everything, otherwise you will be too lazy to do anything halfway through the work, and it will delay more things.
1. The tools and materials must be prepared. You are like the steel tape measure and level used for measurement. This level is too important, which is directly related to the flatness of the installation; there are also markers used to mark and position the drilling holes. Then there are common tools such as electric drills, screwdrivers, and wrenches. Oh, by the way, sometimes you have to use a cutting saw for cutting bridges. You have to be careful when using this and take good protection! The bridge itself, various specifications of direct, curved, three-way, and four-way, as well as connecting pieces, screws, nuts, grounding wires, hoisting parts, support arms, and columns, must be prepared according to the design drawings and actual conditions on site, according to the quantity and model. None of them is missing, and even a small part may not be installed!
2. You must understand the drawings thoroughly! You must not look at the construction drawings in a daze. The direction, installation height, specifications, and slope requirements written on it are all deadly key points. One step away from the drawings, and the Cable tray installation guidelines may be messed up later. Rework is difficult and expensive.
3. On-site investigation is also critical! I got a look at the scene and saw that the actual road and installation location of the bridge were the same as the drawings? Is there anything like water pipes, air pipes, etc. blocking the way? Are the walls and ceilings solid or not? Can they withstand the weight of bridge trays and cables? All of these must be understood clearly and you have a clear understanding of them.
What are the key steps and techniques during the installation process? This must be carefully listened to and carefully. It is all about experience and can help you avoid many detours!
1. The marking positioning must be accurate! According to the drawings and the size measured on site, use a marker to mark the position of the bracket and hanging hanging on the wall, top or column. This position must be measured accurately, and the left and right, up and down cannot be too different. The distance between two hanging frames or support arms is also important. Generally speaking, for ordinary pallet or ladder bridges, the distance should not exceed 1.5 meters to 3 meters – how much it is. It depends on the specifications of the bridge itself and the weight it carries. This must be mastered flexibly and cannot be generalized. It is not necessary to move dogmas independently! When measuring, the ruler should be straightened and pulled tightly, so don't be crooked.
2. The bracket must be installed stably! Once the marking is drawn, it is time to apply expansion bolts or embedded iron parts, and then fix the pillars, support arms, and hangers. The bracket itself must be installed firmly and smoothly. If you shake it hard, you will definitely not feel loose. Once it is loose, the bridge may deform or fall off over time, and the trouble will be great! Use a level to calibrate it to ensure that it is level overall. If there is a slope requirement, you must adjust the slope. Don’t do the wrong direction. Water flows to the lower part. Sometimes the cable tray should also consider drainage.
When installing the bridge, you must not be careless about the connection and grounding, as this is directly related to the stability and safety of the bridge use! When buying a bridge tray, you usually use a special matching connecting piece and screw to align and align the ends of the two bridge trays, not one high and one low, one left and one right, and then tighten the screws one by one. When twisting the screws, you should also pay attention to the uniform force, do not screw the screws smoothly, and do not damage the connecting surface of the bridge tray – carefully check each connection point to ensure that the connection is tight. Provide global procurement services for weak current intelligent products! There is also grounding. Our country has regulations that the metal cable tray, its bracket and the metal cable conduit introduced or exported must be grounded reliably. Moreover, there are requirements for this grounding resistance and cannot be too large. The specific data depends on the specifications. Generally, a copper core grounding wire with a cross-sectional area of no less than the specified requirements is used. One end is fixed to the bridge frame with a grounding clamp or screw, and the other end is connected to the nearby grounding main line or grounding body to ensure that the entire bridge frame is a path and prevent leakage and electric shock.
After the cable is laid into the bridge, the later inspection and some finishing work should not be relaxed. This is the final step to add the finishing touch! When laying the cables inside the bridge, do not stuff them too much. Leave some space to facilitate heat dissipation and may also add cables in the future. If cables of different voltage levels and different uses are designed to be laid separately, they must be separated. They cannot be mixed together and messy – sometimes strong and weak electric currents must also be separated. After everything is done, cover the cover of the bridge tray. If it is a grooved bridge, cover the cover tightly to prevent dust from falling in and prevent people from accidentally touching the cable inside. Finally, let’s take a look at the overall situation. The bridge tray is installed horizontally and vertically, with beautiful appearance and not being beautiful, mainly firm, safe and comply with the specifications.
Finally, let’s talk about a few common questions and answers to help you sort out your ideas!
Q: There are so many types of bridge trays, ladder type, pallet type, and groove type. How should I choose
Answer: It depends on the condition of your cable and the environment. It has good heat dissipation and convenient wiring. It is suitable for cables with large cross-sections and small number. It is generally a type of power cable, so you can see that the cables inside are easy to inspect and search for daily maintenance and search. The semi-sealed pallet type can be used for a little dust or light water. It is used more commonly in ordinary cable lines and is considered to be an intermediate gear in application. The closed-type slot type has the best protection performance, which can prevent dust, moisture, light and even mild mechanical damage. For example, control cables, weak current cables, or areas with poor environments, it is recommended. If external electromagnetic interference is more complicated and serious, consider adding partitions or shielded slot type to add additional protection levels.
Q: Is there a possibility of choosing the priority term? Is there a possibility of errors when installing the minimum allowable net span between the ladder bracket and the bracket? For example, if you calculate 1.345m, you can directly select approximate 1. If the on-site environment is not blocked by other things, the load is very, very light and it may be a temporary short-term situation. However, the specifications recommend or approximate roundness, at least close to the nearest, and leave a little leftover less than the theoretical value, and the standard is relatively safe. Don't throw the integer down at will. Of course, it is not strictly not strictly absent from the most critical value, but it is recommended to follow the safety practices of Big One.
Personally, although installing a cable tray is not a very profound technical job, there are still many details that need to be paid attention to. We must strictly follow the design specifications and relevant standards, be more careful and patient, safety first, and quality is also top priority. In this way, the installed bridge tray can make people feel at ease and the cable lines can work stably for a long time.
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