7408.11 - Of which the maximum cross-sectional dimension exceeds 6 mm:

This HTS category, 7408.11, specifically covers copper wire of refined copper where the maximum cross-sectional dimension exceeds 6 millimeters. This classification is intended for relatively thick copper wires used in various industrial applications where larger gauge wires are required for electrical conductivity or structural integrity. Examples include certain types of power transmission cables, industrial wiring, and components for heavy machinery.

The key differentiating factor for this category lies in the substantial cross-sectional dimension of the wire, distinguishing it from the sibling category 7408.19, which encompasses all other copper wire not meeting the specified dimensional criteria, including thinner wires. The "refined copper" aspect ensures that the material purity aligns with the broader scope of Chapter 74.

Within this category, further distinctions are made based on more precise measurements of the maximum cross-sectional dimension. Subcategories 7408.11.30.00 and 7408.11.60.00 divide the wire based on whether its dimension exceeds 9.5 mm or falls between 6 mm and 9.5 mm, respectively. These subdivisions allow for more granular classification, potentially reflecting different manufacturing processes, end-uses, or associated duties and regulations.