TECK 90 cable details:

Teck Cable 6AWG 3C 

Applications
Stranded 1350 aluminum conductors shown in this section of data are classified as follows:

Class AA For bare conductors usually used in overhead lines.

Class A For conductors to be covered with weather-resistant materials and for bare conductors where greater flexibility is required.

Compact strand conductor for use in bare overhead applications or for use with weather-resistant coverings or insulations is also available.
Classes refer to stranding and are an indication of relative conductor flexibility, AA being the least flexible, C the most flexible.

Construction
Aluminum alloy 1350-H19 wires, concentrically stranded.

Specifications
AAC bare conductors meet or exceed the following ASTM specifications :

B-230 Aluminum Wire, 1250-H19 for Electrical Purposes
B-231 Aluminum Conductors, Concentric-Lay-Stranded
B-400 Compact Round Concentric-Lay-Stranded Aluminum 1350 Conductors