An underground cable comprises of one or more conductors that are covered using suitable insulation and is surrounded by a protecting cover. The underground cables should have following five features:
- The conductor that is employed in cables should be of tinned copper or aluminum that is having high conductivity.
- The cable should be stranding so that conductor remains flexible and can carry more current
- Conductor should be appropriately sized in order to deliver desires amps without overheating
- Conductor should be well designed to not drop voltage beyond permissible percentage
- The insulation used should have proper thickness so as ensure reliability and safety of operations
- The cable should be strong enough to withstand the impact while laying it
- The cable material should have chemical stability
- The cable material should have physical stability