What is the current carrying capacity of 3mm wire?

The current carrying capacity of a 3mm wire, typically referring to its cross-sectional area, can vary based on factors such as the type of insulation, ambient temperature, and installation conditions. Generally, for copper wire, a 3mm diameter (approximately 7.1 mm² cross-sectional area) can carry around 50 to 70 amps in open air. However, it's essential to consult specific electrical codes or guidelines, such as the NEC (National Electrical Code), for precise ratings as they provide detailed tables based on various conditions. Always consider safety factors and potential voltage drop for longer runs.