Content
Medium and low voltage underground cable ducts in the distribution networks
20 February 2008
- A trencher (photo DR).
- Burying a medium voltage line (photo DR).
Medium and low voltage underground cable ducts account for about 30% of distribution networks
In order to protect the network from climatic events and on environmental grounds more than 80% of newly constructed medium voltage (20,000 volts) and low voltage (less than 1,000 volts) are now buried.
The cables are either protected by a tube or buried in the ground on a bed of sand. Junction boxes are used to connect two cables. these are either placed directly in the ground or in concrete junction chambers.
