Rectangular Wire Resistance
Rectangular Wire Resistance Model
DC resistance of a rectangular wire is:
Units: Ohms
AC resistance of a wire is:
Units: Ohms
Skin Depth is:
Units: meters
Description
Resistance calculated using this tool includes both dc and ac resistance of a rectangular conductor. At low frequencies, where skin depth is greater than conductor width and thickness, ac resistance is approximately the same as the dc resistance. As frequency increases, ac resistance increases.
Assumptions and Limitations
Dimensions are in meters.
Wire is assumed to have uniform circular cross section over its length.
Wire relative permeability: 
Wire relative conductivity: 
Constant
Permeability of free space: 
H/m
Conductivity of copper: 
= 5.98 x 10 7 S/m (Siemens per meter) at 20-degrees C
Reference: “Analysis of Multiconductor Transmission Lines,” 2nd Ed., Clayton R. Paul, 2008.
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