Cable Size Chart __top__

Used in Europe, Asia, and most of the rest of the world.

Ultimate Guide to Cable Size Charts: How to Choose the Right Wire cable size chart

= (Length × Current × Resistivity) / Cross-sectional area Used in Europe, Asia, and most of the rest of the world

the ampacity that exceeds your required current. For 20A → 2.5 mm² copper. Used in Europe

Predominantly used in North America, where higher gauge numbers indicate smaller wire diameters.

Widely used globally, measuring the cross-sectional area of the conductor in square millimeters.

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.