Calculated Industries ElectriCalc Pro User Manual - — 11

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♦ 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).