In the United States, the National ElectricCode sets standards for maximum safe currents in insulated copperwires of various diameters. The accompanying table gives a portionof the code. Notice that wire diameters are identified by the gauge ofthe wire, and that 1 mil = 10-3in. Find the maximum power dissipated per length in (a) an 8-gauge wire and (b) a 10-gauge wire.Gauge Diameter (mils) Safe current (A)8 129 3510 102 25
Ohm's law
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In the United States, the National Electric
Code sets standards for maximum safe currents in insulated copper
wires of various diameters. The accompanying table gives a portion
of the code. Notice that wire diameters are identified by the gauge of
the wire, and that 1 mil = 10-3
in. Find the maximum power dissipated per length in (a) an 8-gauge wire and (b) a 10-gauge wire.
Gauge Diameter (mils) Safe current (A)
8 129 35
10 102 25
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