Underground cable
An underground cable is a cable that is buried below the ground. They distribute electrical power or telecommunications. Such cables are an alternative to overhead cables, which are several meters above the ground. Overhead cables are often replaced with underground cables. Downtown areas with many tall buildings usually have few or no cables above ground, This is mainly for aesthetic purposes because underground cables can not be seen.[1] They are also less dangerous to people because they are out of the way. They cost more to install, but last longer.
It is a bit challenging to identify the fault in underground cable because it is located inside the earth where cannot be seen or accessed by test equipment. Faults are usually one of three different types. They can be short circuit, open circuit, or the breakdown of cable insulation. It required some testers like Underground Wire Locator to identify the fault
Underground Cable Media
- Markgroeningen Pylon Transformer.JPG
A former pylon transformer south of Markgröningen, Germany. Today, the pylon carries only a switch fed by two underground cables.
- Bogenbach bei Baerndorf Pfahl1.JPG
An underground cable marker. Markers are put at regular intervals to show the route and warn of the hazard of digging into the cable.
- Utility trench in Bwy @ 42 St jeh.jpg
Cables under Broadway in 2013
References
- ↑ "Manage Overhead cables". Retrieved 29 August 2017.
