How is voltage drop through the power wire to the unit checked?
A) The difference between the nameplate voltage and the actual operating voltage is the voltage drop.
B) The difference between the minimum and maximum allowable nameplate voltages is the voltage drop.
C) The difference in voltage before and after starting the furnace is the voltage drop.
D) Measure the resistance of the power wire from the source to the furnace and multiply it times the furnace operating current.
C
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