The common U.S. wire gauges (called AWG gauges) refer to sizes of copper wire. The resistivity of copper at 20 C is about
This table uses this value of resistivity, but it is known to vary by a few percent based on purity and process of manufacture.
The U.S. wire gauges (called AWG gauges) refer to sizes of copper wire. This table corresponds to a resistivity of
for copper at 20 C. This table uses this value of resistivity, but it is known to vary by a few percent based on purity and process of manufacture.
*The AWG system states areas of round copper wires in "circular mils", which is the square of the diameter in mils. 1 mil =.001 inch.
This data from Floyd, Electric Circuit Fundamentals, 2nd Ed.
**Maximum current for chassis wiring. Data from Handbook of Electronic Tables and Formulas for American Wire Gauge. The maximum current for power transmission is less.