#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 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

_{)}

## Would you like to share your thoughts?