Wire-size calculator
Smallest conductor that satisfies both ampacity and voltage drop for the run.
Recommended8 AWG
- Limited by
- voltage_drop
- Ampacity
- 50 A
- Voltage drop
- 2.55%
- Req. ampacity
- 25 A
NEC 310.16 derated + 210.19(A) voltage drop + 210.19(A) 125% continuous
Design aid only — not a P.Eng stamp. Verify with a licensed professional before installation. ABYC marine values are pending licensed verification.