Which cable size generally contains 7 strands?

The cable size that generally contains 7 strands is indeed 2 AAAC. This construction is typical for several aluminum alloy conductors, where the design often includes strands that are arranged to provide flexibility and improve the conductivity of the cable.

The 7-strand configuration is specifically advantageous for increasing the effective surface area for current flow, while also allowing for better handling characteristics during installation and maintenance. In larger conductor sizes like 4/0 AAAC and 1/0 AAAC, more strands are typically used to achieve the necessary conductivity and flexibility. Meanwhile, 1/0 TPX is a different type of cable designed primarily for other applications and does not conform to the 7-strand structure.

Understanding the strand configurations used in these cables is important for linemen, as it affects the selection of the right type of cable for specific electrical loads and installation conditions.