Calculated Industries ElectriCalc Pro User Manual - — 13

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♦ Second Press  

Displays the aluminum Grounding  

conductor size.

♦ Third Press  

Displays the NEC table referenced for  

the calculation.

fuse/breaker Keys

The ElectriCalc Pro has special keys that automatically calculate the 

Amp ratings of the following over-current protection devices: Dual 

Element Fuses (Time Delay), Single Element Fuses (Non-Time 

Delay), Instantaneous Trip Breakers (Type 1), Inverse Time Breakers 

(Type 2), and Overload Protection Devices.

These Fuse and Circuit Breaker sizes are derived using the “Percent 

of Full-Load Current” multipliers listed in NEC Table 430.52.

If a parameter is missing or invalid, the calculator will display 

none.

overload protection —

♦ First Press 

Displays the Overload Amperage requirement 

based on the Full-Load Current shown on the 

motor nameplate. Multiplies the entered  

motor nameplate Full-Load Current  

(stored in the  register) by 115% or  

the value you enter.

Conforms to NEC Section 430.32(A)(1) value 

of 115%, unless you enter another value. For 

example, entering 125  would calculate 

Overload protection based on 125% of the 

entered Amperage.