Cathodic Protection Cables
The cables used in cathodic protection systems are single-core type insulated coating. The cable conductor shall be annealed of copper thread and the strings shall be of circular cross-section. Cable coating usually consists of two insulation and sheath segments. Primary insulation of the cable shall be made of materials physically and chemically resistant to the environmental impact of the service in a buried or submerged state.
This should be achieved by applying continuous coatings with sufficient dielectric properties and high scratch resistance, stress cracking and crack propagation. The cable sheath shall also be continuous, uniform thickness and meet the minimum required thickness. The cable sheath shall be such that it can be removed without damaging the insulation. Cable coating (insulation and sheath) shall be completely free from any cracks, gaps, scratches or other discontinuities.
Dimensions and electrical resistance of cathodic protection cables according to IPS-M-TP-750
Cross Sectional Area (mm2) |
Minimum Number of Wires per Conductor |
Maximum Conductor Electrical Resistance at 20 °C (Ω/km) |
Approximate Conductor Flow Capacity at 25 °C (A) |
4 6 10 16 25 35 50 70 95 120 |
7 7 7 7 7 19 19 19 19 19 |
4.52 3.02 1.79 1.13 0.712 0.514 0.379 0.262 0.193 0.153 |
42 54 73 98 129 158 196 245 292 344 |
Common cables used for cathodic protection are categorized by type of coating (insulation and sheath) as follows:
Cable with high molecular weight polyethylene coating (HMWPE/PVDF or Kynar)
In this type of cable, insulation and sheath are made of thermoplastic polyethylene. This type of cable, mainly known as the Kynar brand, is mostly used in environments containing high chlorine and corrosive, including soils containing chlorine, saline, seawater and low pH acidic environments.
Cable with Polyvinylchloride coating (XLPE/PVC)
In this type of cable, the insulation and sheath are made of polyvinylchloride or the chemical compound of vinyl chloride and vinyl acetate. This cable is used in common cathodic protection applications, including buried structures in chlorine-free soils and fresh waters.
Borna Electronics Co. declares its readiness to supply all types of cathodic protection cables based on the requests of respected clients or project needs.