Which wire size is physically the largest?

The largest wire size among the choices given is #8. In American Wire Gauge (AWG) sizing, a lower gauge number indicates a larger diameter wire. Therefore, as the gauge number decreases, the wire becomes thicker.

In this context, #8 wire has a larger diameter compared to #10, #12, and #14 wires. Specifically, #8 wire has a diameter of approximately 0.1285 inches (3.264 mm), whereas #10 wire is about 0.1019 inches (2.588 mm), #12 wire is around 0.0808 inches (2.053 mm), and #14 wire has a diameter of about 0.0641 inches (1.628 mm).

This system of sizing ensures that applications requiring more current capacity or better conductivity can utilize appropriately larger wires. Understanding wire gauge is crucial in electrical work to ensure safety and efficiency in electrical installations.