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User's GUide — 11
(cont’d)
♦ Second Press
Displays the maximum adjusted Ampacity
of the Derated Wire Size.
♦ Third Press
Displays the Derated Adjustment Factor per
the NEC Table 310.15(B)(3)(a).
♦ Fourth Press
Displays the NEC table referenced
for the calculation.
Voltage Drop Keys
The ElectriCalc Pro will calculate maximum Lengths, minimum Wire
Sizes or actual Voltage Drops given the other two values. Voltage
Drop solutions are based on the DC Resistance values found in
NEC Chapter 9, Table 8.
Note: Voltage Drop solutions may vary slightly from actual AC circuit
values as the calculator does not incorporate factors such as inductive
reactance, skin effect, raceway material, etc.
Percent Voltage Drop — Used to enter or
calculate Voltage Drop. The default Voltage Drop
is 3%. If Wire Size or Wire Length values are not
available, nonE will display, since the Voltage
Drop cannot be found.
♦ First Press
Enters a maximum allowable Voltage Drop
percentage or calculates actual Voltage Drop.
♦ Second Press
Calculates actual percent Voltage Drop.
Length — Enters or calculates the Length of a
run for Voltage Drop calculation.
Note: Units of Length can be set to Feet or
Meters by changing the Preference Setting (see
Preference Settings section).
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