Engineering design will have a decisive impact on the whole process of wiring, so designers should be careful, do a full investigation and study, and collect relevant information (including some drawings of buildings, drawings of engineering materials such as decoration, and wiring materials, etc.). ), and should fully consider the economic conditions, application requirements, construction progress requirements, etc.
If the building is still under construction and comprehensive wiring requirements are put forward, the merchants can put forward specific requirements for the design of the building according to the overall layout and wiring requirements, such as proposing the channel specifications for wiring between the upper and lower floors, embedding some pipes and so on. These requirements can be reflected in the design drawings of buildings, so that some wiring can be completed at the same time in the early stage of construction, avoiding many disadvantages in the later stage of construction, reducing duplication of work, improving work efficiency, and being reasonable and easy to implement.
If the comprehensive wiring is carried out synchronously with the interior decoration project on the basis of the original building, the design must be carried out according to the actual reconnaissance and the information of the original building and decoration design. Wiring design and decoration design must be communicated frequently in order to be closely combined. The cooperation in the early stage will directly affect the cooperation in the later stage of construction.
In general design, material selection and layout arrangement are directly related to demand and capital investment. For example, a unit is short of wiring funds due to the purchase of a building, and its office building layout is divided into three floors, the office department is located on the second and third floors, and the first floor is the business hall. Relatively speaking, the nodes are unevenly distributed and far away. Our solution is to use hierarchical wiring in the layout. The second and third floors are centralized, and the cables of all information points are directly connected by the computer room. The first floor is divided into two parts, and a cabinet is placed in the lobby. Eight trunks are pulled from the computer room to the cabinet, and the business information points in the lobby are wired by the cabinet. Pull two trunks from the computer room to the Bay303 switch Hub on the counter to carry the load of 20 workstations on the counter, and then pull six trunks from the computer room to the Hub to carry nearby information points, large color screens and information points on the first floor. In the design of power supply, two distribution boxes, one for UPS and the other for ordinary commercial power, are placed at the business point, and each air switch controls the large color screen and each information point. Three distribution boxes are also placed on the counter to supply power to the workstation. In product selection, we chose the wiring products of AMP company with lower price, which not only ensured the quality but also satisfied the users.
The other company is relatively well-off in economy and has high requirements for wiring, so AT & amp； Full range of products. In addition, the layout of the unit is relatively unified, divided into the first floor and the second floor. In this way, we use centralized wiring, and the lines of information points are directly pulled out from the computer room, which is convenient for centralized management and has greater redundancy and can be used for a long time. The power supply is also controlled by air switch, which plays a multi-level protection role in practice.
construction stage
There are many factors involved in the specific construction stage, and the construction site commanders must have high quality. Their on-site decision-making ability often depends on their understanding of design and their mastery of wiring technical specifications.
This project is a comprehensive work. Decoration and wiring at the same time. Generally, wiring comes into play earlier, so many things that can be done are done first, such as digging trenches in the wall, drilling holes, laying pipes and so on. Therefore, in order to grasp the initiative, the construction unit should strive to start construction as soon as possible and carry out construction in a planned way. For example, some tests can be carried out in typical places to determine some aspects of specific construction, and problems can be solved as soon as possible. For the problems that can't be solved at the moment, designers can supplement and modify the design scheme according to the site construction situation.
A typical example is: in the construction of a project, the preliminary work comes into play late, the builders are not prepared enough for specific materials, and the on-site commanders are inexperienced, which leads to a very slow progress. In addition, the construction workers did not handle some technical problems in place, such as the hollow bricks used for partition walls, which were all broken when they were knocked hard, which not only made the construction difficult, but also caused the dissatisfaction of the decoration department, making the relationship between them very uncoordinated and poorly coordinated, so that the wiring department was exhausted and still could not keep up with the decoration progress; In the middle, it was found that the construction was not standardized, and several reworks made the whole project progress very smoothly. In the middle, some time was delayed because of the lack of some materials, so the whole project was not done well.
In several other projects, we have learned from previous experiences and lessons. First of all, establish a good relationship with the decoration department so that the project can be carried out in a coordinated atmosphere. However, due to some reasons such as untimely delivery, we still wasted a lot of time, and our work in this area needs further improvement.
When managing the embedment, we must consider the difficulty of pulling wires, use pipes with reasonable diameter, especially in the case of many changes, we must try to leave gaps and fully consider the next work. Mark the two ends when pulling the wire, and put them in bundles according to a certain method to reduce the subsequent finishing work.
After all cables are laid in place, it is generally necessary to wait for other work of the decoration department to be completed before making the next module and panel. In particular, the next step can only be carried out after all the painting is completed. If the module is painted before painting, some liquids such as lime water will invade the module, causing quality problems and rework. Similarly, the panel will be dirty in the morning, which will increase the next cleaning workload.
Inspection and acceptance stage
After the wiring work is completed, all information points shall be tested and checked. Generally, special instruments such as FLUKE can be used for testing, and the test can be carried out one by one according to the marking diagram of each information point. If problems are found, you can make records first, and then re-examine some problematic places after all the tests are completed. At the same time of testing, do a good job of identification, mark the number of each point at the information point and distribution frame with label paper and indicate it on the floor plan, so as to manage, use and maintain the system in the future. Generally, there are problems at both ends of the inspection. This may be because the distribution frame is not done well, or the module is not done well. Another possibility is that the screws drilled into the network cable will lead to short circuit when the panel is installed, and so on.
After all tests are completed, clean up the floor plan and finally make a completely correct label diagram for future reference.