WireSizing
Wire gauge reference & calculator

What Wire Size for 200 Amps?

Copper Wire
4/0 AWG
11.684 mm · 107.2193 mm²
Aluminum Wire
4/0 AWG
11.684 mm · 107.2193 mm²
Breaker: 200A · Based on NEC Table 310.16 (75°C insulation)

Common Uses for 200A Circuits

Residential service entrance, commercial feeders

4/0 AWG Copper — Key Specs

Diameter11.684 mm (0.46")
Area107.2193 mm²
Resistance at 20°C0.1608 Ω/km
Weight960.685 kg/km
Ampacity (75°C)195 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.

Related

4/0 AWG full specifications → Full AWG chart → Wire size calculator → Ampacity tables →