Gauge Diameter, mils Safe current, A 4 6 8 10 12 14 16 18 204 162 129 102 81 64 51 40 70 50 35 25 20 15
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Q.no.6:
The (United States) National Electric Code, which sets maxi-
mum safe currents for insulated copper wires of various diameters, is
given (in part) in the table. Plot the safe current density as a function
of diameter. Which wire gauge has the maximum safe current density?
(“Gauge” is a way of identifying wire diameters, and 1 mil = 10–3
in.)


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