When you have more voltage going through a wire you can use a thinner wire. This is because the wattage (typically) stays the same, so when V goes up Amps go down.
P = V * I
P, in Watts
V, in volts
I, in Amps
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Quote:
At 55 mph, a 10% drag reduction translates to a 5% increase in fuel economy. At 70mph,a 10% drag reduction translates into a 4% increase Phil Knox (Aerohead), Aerodynamics Seminar #2

