Inputs
Calculation Steps 210.20(A) · 240.4 · 240.6(A)
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Quick Reference — 240.6(A) Standard OCPD Ratings
| Standard Ratings (amperes) |
|---|
NEC 310.16 Ampacity Reference 60°C / 75°C / 90°C columns, not more than 3 current-carrying conductors, 30°C ambient
| Size | Copper | Aluminum / CU-Clad Al | ||||
|---|---|---|---|---|---|---|
| 60°C | 75°C | 90°C | 60°C | 75°C | 90°C | |
Values from NEC 2023 Table 310.16. Applies to conductors in raceway, cable, or earth (direct burial), based on ambient temp 30°C (86°F).
Study aid only — verify against the adopted code edition and a licensed professional before use in real project or estimate documentation. Ampacity values are for reference only; derating factors (ambient temperature, conduit fill, etc.) are not applied here.