#2 American Wiring Gauge (AWG) properties: diameter, area, resistance.
#2 AWG wire diameter
The diameter of #2 AWG wire in inches:
d2(inch) = 0.005 inch × 92 (36-2)/39 = 0.2576 inch
The diameter of #2 AWG wire in millimeters:
d2(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:
An (kcmil) = 1000×dn2 = 1000×(0.2576 in)2 = 66.3713 kcmil
The area of #2 AWG wire in square inches:
A2(inch2) = (π/4)×dn2 = (π/4)×(0.2576 in)2 = 0.0521 inch2
The area of #2 AWG wire in square millimeters:
A2(mm2) = (π/4)×dn2 = (π/4)×(6.5437 mm)2 = 33.6308 mm2
#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 25.42 times the cross sectional area An in square inches (in2):
Rn (Ω/kft) = 0.3048 × 109 × ρ(Ω·m) / (25.42 × An (in2))
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 An in square millimeters (mm2):
Rn (Ω/km) = 109 × ρ(Ω·m) / An (mm2)
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