Conductor Ampacity: Correction & Adjustment Factors
5:18
That wire's table ampacity and its real ampacity in your conduit are often two different numbers.
In this lesson: Table 310.16 base ampacity, why the terminal rating caps your final answer, ambient temperature correction (310.15(B)(1)(1)), conductor-count adjustment (310.15(C)(1)), four full worked examples (including stacking both factors), the neutral-counting rule, insulation type (THHN vs THWN), and free-air ampacity (Table 310.17).
Based on the 2023 NEC (Article 310).
