WIRE GAUGE CHARTS
2/0 wire in mm
Thickness: 9.27 mm diameter (0.365 inches), 67.43 mm² cross-section of solid copper.
Specifications
- Diameter
- 9.27 mm
- Diameter (imperial)
- 0.365 in
- Cross-section
- 67.43 mm²
- Area (kcmil)
- 133.1
- Copper resistance
- 0.078 Ω/1000 ft
- Copper resistance (metric)
- 0.26 Ω/km
- Copper weight
- 604.2 g/m
- Ampacity (NEC 75 °C)
- 175 A
Nearest metric sizes
67.43 mm² does not match a standard metric cable size exactly. The closest conventional cross-sections are50 mm², 70 mm² and 95 mm²— engineers round this wire up (larger cross-section) for ampacity, or accept the raw equality for signal work.
One gauge away:1/0 · thinner3/0 · thickerFull chart →
Frequently asked questions
Is 2/0 gauge wire thick or thin?
2/0 gauge wire is 9.27 mm in diameter. On the AWG scale a lower number means a thicker wire, so 2/0 AWG sits toward the thick end, where service and feeder wires live.
How many amps can 2/0 gauge wire carry?
NEC Table 310.16 rates 2/0 AWG copper at 175 A in the 75 °C column (see our amp chart for 60/75/90 °C ratings). Use the calculator to check voltage drop at your run length; long runs often force one size thicker.
What diameter is 2/0 wire in millimeters?
2/0 gauge wire is 9.27 mm (0.365 in) in diameter, with a solid-conductor cross-section of 67.43 mm².