How to Fix Leaky Cable on Subway
Author:sanyuan Time:2017-07-13 09:46:41
Leaky feeder cable is often used as a special antenna for indoor signal coverage. There are numerous small holes on the leaky cable to let RF signal in and out. It is impossible for overground signal to penetrate concrete into subway. To receive cellphone signal in subway, we must install leaky feeder inside subway.
Where Are Those Leaky Feeder Cable Installed?
Leaky cable is a broad cable often seen in 13 8 inch. Cable of such thick diameter is not easy to cut into small section and cannot bend. So, where can you keep a thick, continuous long cable in subway? The answer is obvious: in the subway tunnel. For your information, the leaky feeders are deployed before a subway is even open to traffic.
What Do We Need to Install Leaky Feeder Cable on Subway Tunnel?
Good question. The subway tunnel inside is an arch layer of smooth cement with hardly any place to attach to, yet we have to attach a long, heavy cable to it. How? This is when we summon a special device: leaky cable clamp (also called leaky cable hanger).
The leaky cable hanger or 13 8 feeder clamp, contains a hoop clamp, a cone-shape holder, and an expansion bolt. Some model also contain a metal ring to prevent fire.
How To Install Leaky Feeder Cable On Subway Tunnel?
You need to install the cone-shape holder to the wall, and then attach the leaky cable. The steps are as follows:
1. Draw a horizontal line where you want to install the leaky cable. Mark the line by every one meter.
2. For a single marked point, drill a vertical hole and put expansion pipe in.
3. Put the bolt through hoop clamp and cone-shape holder and screw tight onto the expansion pipe.
4. Clip the leaky cable in.
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