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| How To Calculate The Cable Capacity Of PVC Pipes And Trunking |
| 2021.12.29 |
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1. How many cables can be put in a PVC pipe?
The cross-sectional area of the inner line of the pvc pipe cannot exceed 40% of the cross-sectional area of the wire and pipe, and the resistance of more than 40% through the pipe is very large, especially the resistance of the embedded pipe is too large to pass through and cannot be rebuilt.
If you use a PVC tube to pass the network cable, there are both Category 5 and Category 6 cables. Because Category 5 is now used less, let's take a look at the number of threaded wires of different types of PVC line tubes that exceed Category 5 and Category 6 cables.
A. The number of threaded wires of super 5 types
Super Category 5 / Category 5 core diameter: 0.511
Section: 19.625mm
External square area: 25mm
Because the cross-sectional area of the inner line of the pvc line tube cannot exceed 40% of the cross-sectional area of the wire tube, let's look at the utilization rate of the pvc line tube at 25%, 30%, and 40%.
Because the calculation is more accurate, some will have decimals. When you actually use them, you will use the small integers.
B. Number of threaded wires of category 6
Six types of core diameter: 0.574
Section: 30.1754mm
External square area: 38.44mm
As above, let's take a look at the utilization rate of pvc line pipe at 25%, 30%, and 40% of the threaded number.
It is worth mentioning that because the cross-sectional area of the super-category 5 line and the category 6 line are different, the cross-sectional area of the category 6 line is larger than that of the category 5 line, so the number of pvc line pipes under the same type is different. Yes, under the same type of line pipe, the number of super-category 5 lines is more than that of category 6 lines.
2. how many network cables can be placed in the trunking
Of course, in actual projects, in addition to using pvc pipes, we will also use pvc troughs. The cross-sectional utilization rate of the wiring troughs for laying cables should be 30% to 50%. Here we also look at common pvc cables. The threading amount of the groove.
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Let's take a look at how many super-category 5 wires and 6-category wires can be placed in a pvc trunking when the utilization rate is 30% and 50%.
A. The threading quantity when the utilization rate of the trunking is 30%.
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B. The threading quantity when the utilization rate of the trunking is 50%.
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Of course, the utilization rate of the actual project is best to take about 40%, that is, the utilization rate is between 30% and 50%.
There are still many owners who are confused and confused about the strong and weak wires in the home decoration circuit. After all, they are decorating their own homes. It is better to understand some of the key points of construction at each stage. For safety, you must understand the strengths and weaknesses. What is the most suitable and safest distance between the lines and pipes?
C. Precautions for strong and weak current wiring
1). Separate wiring for strong and weak current. It is forbidden to use the same tube box for both, and the parallel distance between the two lines cannot be less than 30 cm.
2) Different weak wires should also be separated, otherwise it will cause signal interference. For example, TV cables, network cables, and telephone cables must be separated through pipes when wiring.
3). Remember to follow the wiring rules of installing pipes and then threading. Only in this way can you prevent the occurrence of wires that cannot twitch, and it will be more convenient for future maintenance.
4). Do not turn at right angles when the wiring needs to be turned. This will easily affect the signal strength in future use. Therefore, it is best to use a large bend, and the metal corner is bent to connect the wire.
3. Separate the strong and weak electricity by 30-50 cm. The most important thing is to facilitate the placement of floor tiles and prevent the floor tiles from hollowing.
Because if the distance between the two wire grooves on the ground is less than 30cm, the wire groove needs to be cut after slotting. After the strong vibration of the hand drill, the floor concrete layer between the two wire grooves may become loose, hollow, and fall off. . (If the concrete leveling and repairing is carried out again, it will cause the shrinkage and cracking of the new concrete leveling layer and the original concrete leveling layer of the floor. If it is not repaired, let alone add it to the second side of the wire groove. , This width may reach about 60-80CM. Home decoration generally uses floor tiles of 60-80CM specifications, which will seriously affect the quality of the floor and floor tile laying, and it is very likely that the floor tiles will be hollow.
Once the floor tiles are empty, does the owner need to find a decoration company? In order to avoid trouble, the decoration requires that the strong and weak currents be separated by 30-50 cm.
4. Does the strong and weak electricity really interfere?
If there is a lot of interference, is there in the weak current box? (There is power in the weak current box), is there near the bottom box? If so, should the weak current bottom box be separated from the strong current bottom box 30-- 50CM? I don't think anyone will do this. For home improvement, the current network is basically Category 6 and TV line 4 is shielded. This kind of interference is basically minimal. Unless it is a large tooling, due to the long distance of the weak current line, a little interference will be generated. Therefore, the KGB galvanized pipe is basically used for the weak current of the tooling, which has good shielding performance
Summary: Separate the strength and weak current of the ground trunking by 50CM, mainly to prevent the hollowing and delamination of the concrete leveling layer in the center of the trunking and the trunking. The ground trunking is horizontal and vertical, and the corners are as large as possible.
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