According to the NEC®, an 8 AWG bare solid copper conductor has a cross-sectional area of ____ square inches.

The correct choice is based on the known cross-sectional area of an 8 AWG bare solid copper conductor, which is approximately 0.013 square inches. Understanding wire gauge measurements is critical in electrical work, as it affects the current-carrying capacity of the wire and, consequently, the overall safety and functionality of an electrical system.

The NEC® (National Electrical Code) provides standardized values for the cross-sectional areas of conductors to ensure that electrical installations maintain safety and performance standards. The measurement for an 8 AWG copper conductor at approximately 0.013 square inches reflects its capacity to handle specific ranges of current safely.

It's important to be familiar with these values, as they play a significant role in circuit design, compliance with electrical codes, and ensuring that wiring is suited for its intended use in various applications.