WIRE GAUGE CHARTS
2 wire in mm
Thickness: 6.54 mm diameter (0.258 inches), 33.63 mm² cross-section of solid copper.
Specifications
- Diameter
- 6.54 mm
- Diameter (imperial)
- 0.258 in
- Cross-section
- 33.63 mm²
- Area (kcmil)
- 66.4
- Copper resistance
- 0.156 Ω/1000 ft
- Copper resistance (metric)
- 0.51 Ω/km
- Copper weight
- 301.3 g/m
- Ampacity (NEC 75 °C)
- 115 A
Nearest metric sizes
33.63 mm² does not match a standard metric cable size exactly. The closest conventional cross-sections are25 mm², 35 mm² and 50 mm²— engineers round this wire up (larger cross-section) for ampacity, or accept the raw equality for signal work.
One gauge away:3 · thinner1 · thickerFull chart →
Frequently asked questions
Is 2 gauge wire thick or thin?
2 gauge wire is 6.54 mm in diameter. On the AWG scale a lower number means a thicker wire, so 2 AWG sits toward the thick end, where service and feeder wires live.
How many amps can 2 gauge wire carry?
NEC Table 310.16 rates 2 AWG copper at 115 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 wire in millimeters?
2 gauge wire is 6.54 mm (0.258 in) in diameter, with a solid-conductor cross-section of 33.63 mm².