Electrician's Licensing Practice Exam

What happens to the AWG value as the diameter of a wire increases?

1. The AWG value increases

2. The AWG value decreases

3. The AWG value remains unchanged

4. The AWG value doubles

The correct answer is: The AWG value decreases

As the diameter of a wire increases, the American Wire Gauge (AWG) value decreases. This is based on the standardized AWG system where a higher number corresponds to a smaller diameter wire. For example, a wire labeled as 10 AWG has a smaller diameter than one labeled as 8 AWG. The reason for this system is to provide a consistent way to categorize wires based on their ability to carry electrical current. Larger diameter wires can carry more current due to their increased cross-sectional area, which is vital for preventing overheating and ensuring safe electrical installations. This means that as wire size increases, the gauge number representing that size will decrease. Hence, the statement that the AWG value decreases with increasing diameter is accurate and reflects the fundamental characteristics of the AWG measurement system.