42 — ElectriCalc Pro
Voltage Drop
The reduction in voltage between the
power source and the load can be de-
termined by entering the phase, volts,
amps, wire material, voltage drop wire
size and length of run. The calculator
determines resistance and then the
voltage reduction. Voltage drop can be
displayed as volts dropped, or as a
percent reduction of potential load.
This calculator also finds voltage drop
wire size once you have entered or
calculated the phase, volts, amps,
length, wire type, and allowable VD
percentage. It will solve for the distance
([Length]) once you have entered or
calculated the phase, volts, amps, wire
type, voltage drop wire size, and allow-
able VD percentage. The
ElectriCalc
Pro uses resistance values found in
NEC Table 8 to determine voltage drop.
NOTE: Voltage drop solutions may vary
slightly from actual AC circuit meas-
urements as the calculator does not
incorporate factors such as inductive
reactance, skin effect, raceway mate-
rial, etc. In most situations, the DC
Voltage Drop calculation is sufficient to
meet safety standards.
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