Home » Training » Trailer Glossary » American Wire Gauge (AWG) American Wire Gauge (AWG)American Wire Gauge (AWG) is a standard method used to specify the diameter of electrical wire. The smaller the AWG number (Gauge), the larger the diameter of the wire. Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on Reddit (Opens in new window) Reddit Share on Pinterest (Opens in new window) Pinterest Share on LinkedIn (Opens in new window) LinkedIn