Wire size calculator (ampacity)
NEC ampacity (75°C): 14→20A, 12→25A, 10→35A, 8→50A, 6→65A.
About this tool
Wire size calculator (ampacity) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Electrical & Electronics. Browse more Electrical & Electronics tools.