Calculated Industries ElectriCalc Pro User Manual - 12 — E

12 — e

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Wire resistance (Wire res) —Displays the 

actual Resistance per 1,000 Feet of the Wire Size 

in  based on NEC Chapter 9, Table 8.

Grounding Conductor Keys

Ground — Used to find the Grounding electrode 

conductor size for AC systems based on NEC 

Table 250.66 and an entered or calculated 

service-entrance conductor (largest size). Only 

actual Wire Sizes are considered valid entries.

♦ First Press  

Calculates the copper Grounding electrode 

conductor size if you have entered a valid  

Wire Size.

♦ Second Press  

Displays the aluminum Grounding electrode 

conductor size.

♦ Third Press  

Displays the Circular Mil area used to calculate 

the Grounding electrode conductor size.

♦ Fourth Press  

Displays the NEC table referenced for  

the calculation.

equipment Ground (eqGrnd) — This function 

uses NEC Table 250.122 to calculate the 

minimum equipment Grounding conductor size, 

given an entered Amperage rating or setting for 

an over-current device up line.

Note: This function deviates from the NEC Table 

250.122 in that 1250 MCM AL is used instead of 

1200 as specified in NEC Table 250.122.

♦ First Press  

Displays the copper Grounding conductor size 

for the entered Amp rating.