WIRE GAUGE CHARTS
3 wire in mm
Thickness: 5.83 mm diameter (0.229 inches), 26.67 mm² cross-section of solid copper.
Specifications
- Diameter
- 5.83 mm
- Diameter (imperial)
- 0.229 in
- Cross-section
- 26.67 mm²
- Area (kcmil)
- 52.6
- Copper resistance
- 0.197 Ω/1000 ft
- Copper resistance (metric)
- 0.65 Ω/km
- Copper weight
- 239.0 g/m
- Ampacity (NEC 75 °C)
- 100 A
Nearest metric sizes
26.67 mm² does not match a standard metric cable size exactly. The closest conventional cross-sections are16 mm², 25 mm² and 35 mm²— engineers round this wire up (larger cross-section) for ampacity, or accept the raw equality for signal work.
One gauge away:4 · thinner2 · thickerFull chart →
Frequently asked questions
Is 3 gauge wire thick or thin?
3 gauge wire is 5.83 mm in diameter. On the AWG scale a lower number means a thicker wire, so 3 AWG sits toward the thick end, where service and feeder wires live.
How many amps can 3 gauge wire carry?
NEC Table 310.16 rates 3 AWG copper at 100 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 3 wire in millimeters?
3 gauge wire is 5.83 mm (0.229 in) in diameter, with a solid-conductor cross-section of 26.67 mm².