This vCalc Wire Copper-to-Insulation (Wire_CU-to-Insulation) equation reports the ratio of a copper conductor's cross-sectional area to the insulation's total cross-sectional area for a wire of a chosen AWG gauge.
The selectable inputs are:
wire gauge ranging from AWG 10 to AWG 40
insulation thickness defined as Single, Heavy, Triple, or Quad
This equation, Wire_Cu-to-Insulation, references 1 page