Automotive Electronics Practice Test

The higher the AWG number, what happens to the wire size?

1. The smaller the wire

2. The larger the wire

3. The thicker the insulation

4. The more strands in the conductor core

The correct answer is: The smaller the wire

In wiring, the American Wire Gauge (AWG) system is used to specify the diameter of electrical wires. As the AWG number increases, the physical size of the wire decreases. This means that higher AWG numbers correspond to thinner wires. For example, a 12 AWG wire is thicker than a 20 AWG wire. This principle is critical in automotive and other electrical applications, as the size of the wire can affect its ability to carry electrical current—smaller wires can carry less current compared to larger wires. Understanding the relationship between AWG and wire size is essential for selecting the appropriate wire for specific applications, ensuring efficient current flow and preventing overheating. In automotive applications, using the correct wire gauge is crucial for safety, performance, and reliability of the electrical systems.