Hello everyone, I'm Brother Xue. There are two types of wiring methods that are commonly used in the computer room engineering integrated wiring system, which are the upper wiring and the lower wiring, what are the benefits of these two methods? What's the difference? How to choose? Let's take a look today!
First, the method of laying cables in the ceiling
In this project, three construction methods are mainly adopted: partition method, internal wiring method and cable channel wiring method. These three methods all require a certain amount of operating space to facilitate construction and maintenance; However, the operation space should not be too large, otherwise it will increase the floor height and project cost. In addition, inspection openings should be set up in appropriate places in the ceiling (or suspended ceiling) for future maintenance and overhaul. The advantages and disadvantages of these 3 installation methods are listed in the table for reference when choosing.
Cable laying method in ceiling ceiling
| serial number | name | Features and construction precautions | merit | shortcoming |
| 1 | Zoning Law | Divide the collapsed room in the ceiling into several sub-districts and lay high-capacity cables. From the junction room by means of pipe through or directly laid to each partition center, by the partition center of the cell to the partition cable through the wall or column to the communication lead-out, can also be set in the center of the adapter, the large-capacity cable is divided into or dry a small cable to the communication lead-out end | 1. Strong flexibility and ability to adapt to future changes 2. It is economical and practical, saving project cost and construction labor 3. The wiring capacity is large, and sometimes it can be used as the backbone wiring | 1. If the cable is laid through the pipe, it will be restricted 2. Sometimes it is not applicable |
| 2 | Internal wiring method | Cables are routed directly from the junction to the communication outlets | 1. Maximum flexibility, not limited by other factors 2. Economical and practical, without other facilities 3. Because the cables are laid independently, the transmission signals will not interfere with each other | 1. Due to different information, the number of cable lines is more 2. The initial investment is larger than that of the zoning method |
| 3 | Cable trough method | The open channel is used to hang in the ceiling, the structure is more complex, and the cable is led out of the channel and leads to the communication lead end through the wall or column | 1. The cable has good protection, safe and reliable 2. Convenient expansion and testing | 1. There are certain restrictions on the cable line, and the flexibility is poor 2. The installation and construction cost is high, and the technology is more complex 3. It is possible to increase the load on the ceiling |
Second, the method of laying cables under the floor
The method of laying cables under the floor is widely used in intelligent buildings, and our company believes that it is especially more suitable in this project. The cable is laid under the floor, which does not affect the appearance and does not need to consider its load, and it is convenient for construction, installation and maintenance. In addition, the operation space is large and the working conditions are good, so it is very popular with construction and maintenance personnel. The wiring methods under the floor mainly include the underfloor embedded pipeline wiring method, the ground trunking (preset trunking on the floor surface) wiring method, the honeycomb floor wiring method, the elevated floor wiring method and the underfloor pipeline wiring method, etc., which can be selected according to the objective environmental conditions. The above methods can be used separately or in combination.
Their features and benefits are shown in the table.
Underfloor cable laying method
| serial number | name | peculiarity | merit | shortcoming |
| 1 | Underfloor embedded pipeline wiring method | It is composed of a metal conduit and a metal trunking, and it is a laying method for the unified arrangement of strong and weak cables. According to the communication and power wiring requirements, the thickness of the floor and the space occupied under the floor, etc., the one-layer and two-layer structures are adopted respectively. The upper layer of the two-layer structure is the wiring conduit layer, the lower layer is the feeder conduit layer, and the cables are laid in layers | 1. Good mechanical protection performance, safe and reliable, reducing the chance of obstacles 2. Good concealment and beauty 3. Flexible and convenient, conducive to wiring 4. It is built at the same time as the power supply system, which is conducive to power supply and use | 1. The project cost is high 2. The structure of the floor is complex, which increases the thickness and weight of the floor 3. It has more coordination with housing construction 4. It is not suitable for the occasion of laying carpets |
| 2 | Ground trunking wiring method | Preset the trunking on the surface of the floor (in the floor cushion), and at the same time bury the ground communication lead-out end, so the floor cushion is thicker, generally more than 7cm. The trunking is available in 50mm×25mm and 70mm×25mm (thickness×width) specifications, and there is also a junction box or junction box for easy wiring | 1. The wiring is convenient and simple 2. It is suitable for large open rooms, adapts to various layouts and changes, and has great flexibility | 1. A thicker cushion is needed to increase the load of the floor slab 2. Because there is a cushion floor, it is easy to be damaged due to many trunking 3. High-grade flooring materials (such as marble) should not be used 4. The project cost is high |
| 3 | Honeycomb floor wiring method | The floor structure is complex, generally made of steel or concrete, in which the conduit and wiring duct are designed in advance, and are generally used for the alternating use of power and communication systems | Similar to the wiring method of embedded pipelines under the floor, it has a large capacity and is suitable for occasions with a large number of cables | It is similar to the wiring method of embedded pipes under the floor |
| 4 | Raised floor wiring method | The raised floor is an raised floor consisting of a number of square panels, placed on steel brackets, each of which is movable for easy installation and access to cables (similar to the raised floor in Table 4) | 1. The wiring is extremely flexible, adaptable, unrestricted, and the space under the floor is large 2. It is easy to install and construct, and the operation space is large 3. The number of cables is large and the capacity is large 4. Good concealment and beauty | 1. The initial project investment is large 2. Reduce the clear height of the room 3. It is easy to have a resonance effect when walking on the raised floor |
| 5 | Underfloor pipe wiring method | It is composed of many metal pipes under the floor, takes the wiring room as the starting point, and lays the metal pipe radially to the position of the user terminal equipment, and if there is a sufficient number of communication outlets, it can adapt to the needs of the user terminal equipment | 1. Good safety and reduce the chance of obstacles 2. Good concealment and beauty 3. The initial installation cost is low | 1. Poor flexibility 2. It is inconvenient to put and replace cables |
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