AS 1222.1

Standard Overview

AS 1222.1 is Australia’s national technical standard for galvanized steel wires used in overhead power lines.

Its full title is “Steel conductors and stays – Bare overhead, Part 1: Galvanized Steel (SC/GZ).” The current version is AS 1222.1-1992. It was developed by the EL/10 Overhead Lines committee at Standards Australia and was officially published on July 21, 1992.

Technical Specifications

AS 1222.1 provides the specific technical rules for bare, galvanized steel wires and support cables (stays) used to transmit electricity overhead. The standard covers everything from single wires to more complex stranded cables.

Core Requirements

Material: Details what the steel wires are made of and how they must perform.

Wire Size: Defines the exact measurements for different types of galvanized steel wires.

Stranding: Specifies how individual wires are twisted together to form a strong, unified cable.

Testing: Outlines the methods for testing the wire’s physical strength and the quality of its protective zinc coating.

Key Features

The standard requires wires to be made from a specific high-strength steel (with 0.6% carbon content) to guarantee excellent mechanical strength. The galvanizing (zinc-coating) process is also strictly controlled. This ensures the wires can resist rust and corrosion for a long time, even in harsh outdoor environments.

Where It’s Used

As the main conducting wires for high-voltage overhead transmission lines.

For stay wires and other support cables within the power grid.

In special situations where power lines need extremely high strength.

For power line projects built in challenging or corrosive environments.