AAC-All Aluminum Conductor ASTM B231 Description
The stranded All Aluminium Conductor (AAC) are made up of concentric-lay-stranded aluminum wires only.The conductor may be made up of 7, 19, 37, 61 or more wires in 1, 2, 3, 4 or more layers around a central wire. Each successive layer shall have six more wires than the layer immediately beneath. For a gien cross-sectional area, the conductor becomes more flexible as the number of wires is increased (with a corresponding decrease in size of each wire).
STANDARD
ASTM B231
Technical data
| B-230 | aluminum 1350-H19, extra hard, round wire for electrical purposes. The aluminum wire shall be made from drawing stock and shall be free of brittleness as evidenced by its ability to be coiled or looped around its own diameter with or without a mandrel. |
| B-231 | aluminum 1350-H19, 1350-H16 or -H26, 1350-H14 or -H24, and 1350-H142 or -H242, bare concentric-lay-stranded conductors constructed with a straight round central wire surrounded by one or more layers of helically layered wires. |
| B-400 | aluminum1350-H19, 1350-H16 or -H26, 1350-H14 or -H24, and 1350-H142 or -H242 bare compact-round concentric-lay-stranded conductors made from round or shaped wires for use as uninsulated electric conductors or in covered or insulated electrical conductors. |
Construction
When All Aluminium Conductors are to be used in overhead lines, full hard drawn temper wires are used. The illustration below show some typical stranding patterns.
stranding patterns All Aluminium Conductors Construction