Cable Size Chart

Used mainly in North America, this system uses a logarithmic scale where smaller numbers represent thicker wires . For instance, a 10 AWG wire is much thicker and can carry more current than a 22 AWG wire.

Note: Ampacity ratings are for standard Thermoplastic Insulation (like THHN/THWN) in open air or conduit, rated at 60°C–75°C. Always check local codes for exact requirements. cable size chart

You might look at a cable size chart, buy the wire, and realize it looks different than expected. This is likely the Solid vs. Stranded difference. Used mainly in North America, this system uses

If you pull 30 Amps through a wire rated for 15 Amps, the wire becomes a heating element. The insulation melts, exposing the copper. If the copper touches anything metal, it creates a short circuit and arcs, causing a fire. Always check local codes for exact requirements

Wires are rated by the temperature of their insulation (e.g., 60°C, 75°C, 90°C).