SANS 1339 is a specification for single-core and three-core cross-linked polyethylene (XLPE) insulated cables for rated voltages from 3,8/6,6 kV to 19/33 kV, the conductors of which can be of copper or aluminum material.

The specification specifies the construction, material, size and testing requirements of the cable in detail to ensure that the cable has good electrical performance and reliability. Among them, the cable structure includes: conductor, insulation layer, filler, sheath layer and other parts.    The conductor can choose different materials such as bare copper or aluminum, plated copper or aluminum, and alloy aluminum. The insulating layer is mainly made of cross-linked polyethylene material to improve the withstand voltage, heat resistance and aging resistance. The filler adds mechanical strength and durability to the cable, while the jacket provides protection against moisture, corrosion and abrasion.

In addition, the specification also stipulates the size and test requirements of the cable, including the number of cores, conductor cross-sectional area, outer diameter, AC resistance, partial discharge and other indicators.


XLPE insulated cables required by the SANS 1339 specification have the following properties:

1.Electrical performance

The cable can work in a high-voltage environment with a rated voltage of 3.8/6.6 kV to 19/33 kV, and can provide good withstand voltage and electromagnetic interference resistance. The AC resistance, partial discharge, dielectric loss and other indicators of the cable conductor must meet the specified requirements.

2.Mechanical properties

The cable structure should have sufficient mechanical strength and durability to resist external forces such as stretching, extrusion, and bending. At the same time, the cable should also have certain chemical corrosion resistance and high temperature resistance.

3.Environmental adaptability

The cable should also have the characteristics of waterproof, moisture-proof, anti-corrosion, and wear-resistant, so as to adapt to different places of use and harsh environmental conditions.


SANS 1339 is a specification for single-core and three-core cross-linked polyethylene (XLPE) insulated cables with rated voltages from 3.8/6.6 kV to 19/33 kV. This cable is suitable for different scenarios, such as:

1.Municipal engineering

Applied in the power distribution network of urban public facilities, streets and other areas;

2.Industrial and mining enterprises

Used in the construction and transformation of power distribution trunk lines in factories, mines and other places;

3.Residential quarters

Used as power distribution lines in residential quarters and


The product structure of cross-linked polyethylene (XLPE) insulated cables required by the SANS 1339 specification includes:


It mades of copper or aluminum;

2.Insulation layer

It mades of cross-linked polyethylene (XLPE) material, which has good electrical properties and heat resistance;

3.Outer sheath

It usually mades of materials such as PVC or flame-retardant polyolefin (FR-PVC) to protect the cable from external physical and chemical damage;

4.Metal sheath

According to actual needs, it can be added outside the outer sheath, which can be galvanized steel strip, aluminum foil and other materials, or it can not be added.