Derating Calculator
Conductor
Table value
25A
Derating Factors
NEC Table 310.15(B)(1)
NEC 310.15(C)(1)
Results
Bundling Factor
1–3 conductors
Ambient Temp Factor
30°C ambient
Combined Factor
1.000Final Derated Ampacity
25A
25A × 1.000 = 25A
Base ampacity: NEC Table 310.16 · Ambient correction: NEC Table 310.15(B)(1) · Conductor bundling: NEC 310.15(C)(1)