The regional standard issued by the Power Institute of Eastern and Southern Africa (PIESA) specifying requirements for concentric single-phase aerial service cables for domestic service connections with a combined neutral-earth conductor, operating at voltages up to 600 V.
PIESA 1062 specifies requirements for concentric single-phase aerial service cables intended for domestic service connections with a combined neutral-earth (CNE) conductor. These cables are primarily designed for aerial connections to a customer's installation in distribution systems serving mainly domestic customers with low to moderate consumption across Eastern and Southern Africa. They may also be installed underground where required.
The cable features a concentric construction with a central insulated phase conductor surrounded by a combined neutral-earth (CNE) concentric layer of annealed copper wires. The phase core is positioned at the centre, and the concentric layer wires are evenly distributed around it.
7-wire circular stranded annealed copper (may be compacted), complying with SANS 1411-1. Available in 10 mm² and 16 mm².
PVC, PE, or XLPE compound applied by extrusion over the phase conductor. Colour: red or brown as specified.
Combined neutral-earth (CNE) conductor consisting of at least 12 annealed copper wires, evenly distributed around the insulated phase core.
Black UV-stabilised PVC or PE compound applied over the concentric layer. Embossed with standard number, voltage rating, conductor size, and manufacturer's identification.
| Phase Conductor (mm²) | Min. Neutral Wires | Min. Insulation Resistance (MΩ·km at 20 °C) |
|---|---|---|
| 10 | 12 | 60 |
| 16 | 12 | 60 |
| 25 | Equally distributed | 60 |
All cables produced to PIESA 1062 must pass the following mandatory tests:
PIESA 1062 is the principal regional standard governing concentric aerial service cables for domestic connections across Eastern and Southern Africa. It is referenced by PIESA 1004-1, which sets system-level requirements for low-voltage cable installations in the region. Compliance with PIESA 1062 ensures cables are fit for the demanding tropical and subtropical operating conditions found throughout the region, and is widely required by electricity distribution utilities for last-mile service entrance applications.
Official Standards & References
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