Wire Derating Chart Repack Info

Standard NEC Table values usually start at 30°C (86°F).

An electrician named Alex finishes wiring a new commercial kitchen. He runs a — rated for 20 amps at room temperature — from the breaker panel to a dedicated outlet for a large mixer. By the book, 12 AWG + 20A breaker = safe, legal, functional. wire derating chart

For example, if you need to run a 20A circuit in an environment with an ambient temperature of 50°C (122°F) using a 3-conductor cable, you would: Standard NEC Table values usually start at 30°C (86°F)