When installing aluminum conductors inside a structure, which series alloy must be used?

The correct choice is based on the characteristics of aluminum alloys used for electrical conductors. The 8000 series alloys, specifically, are designed for applications such as wire and cable because they possess excellent electrical conductivity and good mechanical strength. These alloys are typically used in applications requiring high conductivity, fatigue resistance, and improved formability.

In contrast, the 1000 series alloys are primarily made of pure aluminum and have great conductivity but lack the strength needed for structural applications. The 6000 series alloys, while stronger and more versatile, are not as commonly used specifically for electrical conductors due to their lower conductivity compared to 8000 series alloys. Finally, the 9000 series is largely related to specific and specialized alloys that do not typically fit the requirements for general conductor use.

Choosing the 8000 series ensures that the aluminum conductors installed inside a structure will perform optimally while meeting the necessary industry standards for conductivity and durability.