To find the
answer to this problem, we refer to The American wire gauge (AWG). AWG, also known as the Brown & Sharpe wire gauge, is a standardized wire
gauge system used for the diameters of round,
solid, nonferrous, electrically conducting wire.
From the table of this
system, a #12 gage copper wire
corresponds to a diameter of 0.08080 inches.
Since in an inch, there
are 1000 mils, therefore the diameter in mils is:
Diameter of #12 gage
copper wire = 0.08080 inches (1000 mils / 1 inch)
Diameter of #12 gage
copper wire = 80.8 mils
The answer is D.
80.81mils.
