Amperage versus Wire Size Table: UL486E – Assigned maximum ampere rating versus wire size for copper conductors. Values are for not more than three conductors in raceway or cable (reference: National Electrical Code, ANSI/NFPA 70-1999).

Wire Size and Cross-sectional Area

Approximate relationship between conductors of cross-sectional areas in mm2 and AWG sizes as used in North America (reference: IEC 998-1).