1. It's a UL-certified safety mark that indicates the size of the conductor.
2. Correct! The larger the number, the smaller the wire cross-section.
3. AWG stands for American Wire Gauge, and is used to describe the size of a conductor. AWG conductors are categorized as either solid or stranded. Solid conductors are categorized by diameter, while stranded conductors are categorized by cross-sectional area. For example, AWG 24 indicates a solid conductor diameter of 0.506 to 0.511 mm; stranded conductors should have a cross-sectional area between 0.201 and 0.205 mm.
