WireSizing
Wire gauge reference & calculator

What Wire Size for 50 Amps?

Copper Wire
6 AWG
4.1154 mm · 13.3018 mm²
Aluminum Wire
4 AWG
5.1894 mm · 21.1506 mm²
Breaker: 50A · Based on NEC Table 310.16 (75°C insulation)

Common Uses for 50A Circuits

Ranges, hot tubs, EV chargers, sub-panels

6 AWG Copper — Key Specs

Diameter4.1154 mm (0.162023")
Area13.3018 mm²
Resistance at 20°C1.2961 Ω/km
Weight119.184 kg/km
Ampacity (75°C)55 A

Important: For long wire runs, you may need to upsize the wire to compensate for voltage drop. NEC recommends keeping voltage drop under 3% for branch circuits. Use our voltage drop calculator to check.

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6 AWG full specifications → Full AWG chart → Wire size calculator → Ampacity tables →