The International Electrotechnical Commission's IEC60228 standard covers the nominal cross-section areas for the conductors of various insulated cables.

Standard IEC60228 covers solid and stranded copper, and aluminium and aluminium alloy conductors in cables for fixed installations and flexible copper conductors. It also sets out the conductors’ requirements in terms of resistance values.

This international standard was adopted by Cenelec as a European standard (and subsequently ratified by all member countries) so is also referenced as EN 60228 (European) and under national references for example BS EN 60228 in the UK.