The three most common methods of cable placement are Direct Buried, Cable in Conduit, and a Total Conduit System.
Most Utilities are currently using one or more of these methods with various degrees of success.
The first system or method commonly undertaken is the Direct Buried method. As this system matures, a few questions come to the surface.
How much care was taken in the preparation for the trench? How was the power cable placed in the trench?
How do different cables react to different soils and ground conditions?
How complicated is it to replace damaged or faulted cables?
When a fault or damage caused by digging occurs, it is very time-consuming to open the trench and make repairs. All these factors and many more affect the reliability and life of the conductor.
Due to various conditions, the Cable in Conduit method is considered in some areas.
The cable is placed in a conduit during the manufacturing process, and this conduit protects the conductor as it lies in the trench, giving it a longer life.
However, most of the same questions occur when using the C.I.C. method as occur when using the Direct Buried method.
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