Oklahoma Locksmith Practice Exam

Which type of wire carries the most current?

1. 16 AWG

2. 20 AWG

3. 12 AWG

4. 24 AWG

The correct answer is: 12 AWG

In the context of electrical wiring, the gauge size of the wire is inversely related to its current-carrying capacity. The American Wire Gauge (AWG) system indicates that a lower gauge number corresponds to a thicker wire, which can safely carry more current without overheating. The wire size 12 AWG, being thicker than the others listed, is capable of carrying more current. Thicker wires have a lower resistance, which allows for a higher flow of electric current and minimizes energy loss due to heat. This makes 12 AWG suitable for applications requiring significant current, such as certain electrical installations and equipment. In contrast, the other gauges listed (16 AWG, 20 AWG, and 24 AWG) are thinner and therefore have lower current-carrying capacities. Each of these wires can handle less current before reaching their safe operating limits, which is crucial to consider for electrical safety and efficiency. Consequently, the choice of 12 AWG as the wire that can carry the most current is well-founded based on its thickness and inherent electrical properties.