# #2 Gauge Wire

#2 American Wiring Gauge (AWG) properties: diameter, area, resistance.

## #2 AWG wire diameter

The diameter of #2 AWG wire in inches:

*d*_{2(inch)} = 0.005 inch × 92 ^{(36-2)/39} = 0.2576 inch

## The diameter of #2 AWG wire in millimeters:

*d*_{2(mm)}* = *0.127 mm × 92 ^{(36-2)/39} = 6.5437 mm

## #2 AWG wire area

The area of #2 AWG wire in kilo-circular mils:

*A*_{n}_{ (kcmil)} = 1000×*d*_{n}^{2}
= 1000×(0.2576 in)^{2}
= 66.3713 kcmil

The area of #2 AWG wire in square inches:

*A*_{2(inch}2_{)} = (π/4)×*d*_{n}^{2}
= (π/4)×(0.2576 in)^{2}
= 0.0521 inch^{2}

## The area of #2 AWG wire in square millimeters:

*A*_{2(mm}2_{)} = (π/4)×*d*_{n}^{2}
= (π/4)×(6.5437 mm)^{2}
= 33.6308 mm^{2}

## #2 AWG resistance

Wire material |
Resistivity @20ºC (Ω×m) |
Resistance per kilofeet @20ºC (Ω/kft) |
Resistance per kilometer @20ºC (Ω/km) |

Copper |
1.72×10^{-8} |
0.1559 |
0.5114 |

Aluminum |
2.82×10^{-8} |
0.2556 |
0.8385 |

Carbon steel |
1.43×10^{-7} |
1.2960 |
4.2521 |

Electrical steel |
4.60×10^{-7} |
4.1690 |
13.6779 |

Gold |
2.44×10^{-8} |
0.2211 |
0.7255 |

Nichrome |
1.1×10^{-6} |
9.9694 |
32.7081 |

Nickel |
6.99×10^{-8} |
0.6335 |
2.0784 |

Silver |
1.59×10^{-8} |
0.1441 |
0.4728 |

* Results may change with real wires: different resistivity
of material and number of strands in wire

#### Wire's resistance per foot

The n gauge wire resistance R in ohms per kilofeet (Ω/kft) is equal to 0.3048×1000000000 times the wire's resistivity *ρ* in
ohm-meters (Ω·m) divided by 25.4^{2} times the cross sectional area *A*_{n} in square inches (in^{2}):

*R*_{n (Ω/kft)} = 0.3048 × 10^{9} × *ρ*_{(Ω·m)} / (25.4^{2}
× *A*_{n}_{ (in}2_{)})

#### Resistance per meter

The n gauge wire resistance R in ohms per kilometer (Ω/km) is equal to 1000000000 times the wire's resistivity *ρ* in
ohm-meters (Ω·m) divided by the cross sectional area *A*_{n} in square millimeters (mm^{2}):

*R*_{n (Ω/km)} = 10^{9}
× *ρ*_{(Ω·m)} / *A*_{n}_{ (mm}2_{)}

## See also