TransPowr® AAC Bare Overhead Conductor (US)
Bare all-aluminum 1350 conductors (AAC) are designed as concentric-lay-stranded wires, meaning they are made up of one or more layers of wire that are helically wrapped around a straight, round central wire. Each successive layer adds six additional wires relative to the layer beneath it, enhancing flexibility while maintaining a consistent cross-sectional area. These AAC conductors are manufactured according to the latest standards outlined in ASTM B231. The most commonly used strandings include 7, 19, 37, 61, and 91. While the sizes and strandings mentioned on the following pages are typical for overhead lines, other sizes are also available.
Class AA strandings are specifically used for bare overhead lines. The outer layer is twisted in a right-handed direction, and the direction of lay is typically reversed in subsequent layers. The temper for these conductors is full hard drawn (H19). In contrast, Class A strandings are primarily used for overhead conductors to be covered with weather-resistant materials, offering greater flexibility than Class AA. The outer layer is also typically laid in a right-handed direction, and the temper is usually H19 as well, with successive layers generally laid in reverse order.
Features and Benefits
An optimal economy is achieved because the conductors' lighter weight reduces per-unit-length costs, facilitates handling during installation, and simplifies fittings. All-aluminum conductors possess high corrosion resistance due to their uniform construction.
Applications
Stranded bare all-aluminum 1350 conductors (AAC) are typically used in overhead line installations where the design requirements do not necessitate the higher strength or temperature ratings offered by ACSR, ACSS, or other types of conductors.
Options
- E3X® surface coating (/E3X)
- Compact aluminum strands (ASTM B400)
- Trapezoidal-shaped aluminum strands (/TW)
- High-conductivity aluminum (/HC) (62.2% IACS)
- Non-specular surface finish (/NS)