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

1.00 (none)

Ambient Temp Factor

30°C ambient

1.00

Combined Factor

1.000

Final 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)