Shielding for power cables usually consists of copper tape that is helically wrapped, longitudinally-applied copper. Additional shielding may be added, depending on cable applications and environmental conditions. A longitudinal corrugated shield can lower electrical resistance and prevent interference, according to Draka Cableteq.
A longitudinal corrugated shield can also be used for increased protection against moisture penetration, which is among the main causes of cable deterioration. According to Prysmian Cables and Systems, adding this type of shielding to water blocking layers is effective in blocking water, dissipates heat more effectively and reduces the occurrence of short circuits.
There are many companies that manufacture different types of electrical cables with a variety of shielding materials, including longitudinal corrugated tape, which may be proprietary. The cables are available in different weights, thicknesses and ratings such as fire resistance, amperage, moisture resistance and heat resistance.