Can the strong and weak bridges be combined?

Some friends have been mentioning issues such as the quotation of the bridge, the amount of cable laying, and the distance between the strong and weak electric bridges. Today we come to understand the construction and quotation of the lower bridge.

First of all, the bridge is different from the trunking, because their shapes are almost the same, but the performance is very different, the installation price will be the same, and the bridge will definitely be more expensive.

First, the distance between the weak electric bridge and the strong electric bridge

Can strong and weak electric bridges be merged?

Strong current metal bridges and weak currents cannot be combined in the same bridge. The parallel distances between strong and weak current bridges must be maintained. The straight line distance between strong and weak currents must be greater than 300MM. This is a specification that must be adhered to by weak currents.

However, sometimes for the sake of convenience or cost saving, they are often put together, which is seriously out of specification, and the interference caused by strong electricity will directly affect the strength of the weak electric signal.

When the cable bridge is installed in multiple layers, control the interval between the weak current cable is not less than 0.2M, the power cable is not less than 0.3M, and the distance between the weak current cable and the power cable is not less than 0.5M. If there is a shielding cover, it can be reduced to 0.3M. The obstacle is not less than 0.3M, and cables with different voltages and different uses should not be laid in the same layer of bridge.

If it is really necessary to lay the bridge in the same layer due to project conditions, a partition must be added in the middle.

Second, the construction quote of weak electric bridge

Regarding the quotation for the installation of the bridge, I have been asked by friends all the time. We have also published it before. This time we will summarize it for your reference. (It is a general quotation. It may be affected by various factors when it is actually done. Will fluctuate).

Here are the installation prices based on the different models.

50-80 (width): 15 yuan per meter, (installation height is 4 meters), 20 yuan per meter (installation height is 6 meters).

100-200 (width): 22 yuan per meter (installation height is 4 meters), 25 yuan per meter (installation height is 6 meters).

300 (width): 28 yuan a meter (installation height is 4 meters), 30 yuan a meter (installation height is 6 meters).

400 (width): 32 yuan per meter (installation height is 4 meters), 35 yuan per meter (installation height is 6 meters).

600-800 (width): 35-45 yuan per meter (installation height is 4 meters), 48 yuan per meter (installation height is 6 meters).

900 * 1000 (width): 50 yuan per meter (installation height and width is 4 meters), 55 yuan per meter (installation height is 6 meters).

This data is for reference. Of course, it will vary with different places, so the price will vary. Everyone can quote according to the specific situation.

Third, the amount of common bridge

The utilization rate of common bridges, here are some common ones. Before understanding the utilization rate of the bridge, we can first understand the core diameter of the next Cat5 and Cat6 cables.

Type 6 core diameter: 0.574

Section: 30.1754

Super five / five core diameter: 0.511

Section: 19.625

In this example, the utilization rate of the bridge is 30% to 50%.

Our actual use should not exceed 40%. So how to calculate the bridge?

E.g:

It is known that the cross-sectional area of ​​Category 6 network cables is 30.1754mm2. Which type of bridge is suitable for 580 Category 6 cables? First, we calculated the cross-sectional area of ​​580 Category 6 wires? 30.1754mm2 * 580 = 17501.73mm2. Since the utilization rate cannot exceed 40%, 17501.73mm2 / 40% = 43754.3mm2. Therefore, the total cross-sectional area of ​​the bridge is greater than 43264.1mm2. Therefore, the approximate bridge models are 150 * 300, 200 * 300, 100 * 600 and other models.