In the AWG system, a gauge decrease of three numbers approximately halves the conductor's _____.

In the American Wire Gauge (AWG) system, as the gauge number decreases, the diameter of the conductor increases. Specifically, when you decrease the gauge number by three, the conductor's cross-sectional area approximately doubles. This is a fundamental component of understanding wire sizes because it affects the electrical and thermal properties of the conductor.

The cross-sectional area is critical when considering the current-carrying capacity, or ampacity, of a conductor. A larger cross-sectional area allows for more current to flow with less resistance, which is essential in preventing overheating and ensuring efficiency in electrical installations. Therefore, recognizing that a decrease of three gauge numbers halves the cross-sectional area aligns with the established principles of wiring and conductor sizing in the AWG system. Understanding this relationship is crucial for designing and executing safe and reliable electrical installations.