#2 Gauge Wire

#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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