Derating Calculator May 2026
Run components at 60-80% of their maximum rating for 100% reliability.
You need to run 10 AWG copper wire (rated 30A at 30°C) through a conduit in a 50°C ambient environment. The conduit will contain 6 other current-carrying wires. derating calculator
7 total conductors (you + 6 others) → factor of 0.70 (from NEC Table 310.15(C)(1)). Run components at 60-80% of their maximum rating
Download a trusted derating app (e.g., Southwire’s Conduit Fill & Derating, or ETAP’s cable calculator) and always verify your results against the latest NEC or local electrical code. Your safety—and your equipment’s lifespan—depends on it. Southwire’s Conduit Fill & Derating
10 AWG copper = 30 amps (based on NEC 310.16 for 90°C insulation).
