Calculated Industries 5070 ElectriCalc Pro User Guide

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TABLE OF CONTENTS

ELECTRICALC ® PRO ..........................................................................3

GETTING STARTED ............................................................................4

KEY DEFINITIONS ...............................................................................4

Basic Function Keys ..........................................................................4

Mode Set-up Keys ..............................................................................5

Electrical Keys ....................................................................................6

Motor Keys ..........................................................................................8

Wire Sizing Keys .................................................................................9

Voltage Drop Keys ............................................................................11

Grounding Conductor Keys ...............................................................12

Fuse/Breaker Keys ...........................................................................13

Conduit Sizing Keys ..........................................................................15

PREFERENCE SETTINGS ................................................................18

BASIC MATH OPERATIONS ..........................................................19

PERCENT CALCULATIONS ..........................................................19

MEMORY OPERATIONS ...................................................................19

Using M+ ...........................................................................................20

Using Memory Storage Keys (M1- M9) .............................................20

USING THE ELECTRICALC PRO .................................................21

KIRCHHOFF’S LAW ...........................................................................21

Finding Voltage .................................................................................21

Finding Amps ....................................................................................22

Finding Current Load ........................................................................22

Finding Amps From Kilowatts ...........................................................23

Finding Volt-Amps .............................................................................23

Finding kVA Rating ...........................................................................24

Finding Wattage ...............................................................................24

Finding kW Rating ............................................................................25

OHM’S LAW .........................................................................................26

Finding Volts .....................................................................................26

Finding Amps ....................................................................................26

Finding Resistance (Ohms) ..............................................................27

MOTOR FUNCTIONS .........................................................................27

Finding Single-Phase Full-Load Current ...........................................28

Finding Motor Wire Size and Ampacity .............................................28

Finding Synchronous Motor Horsepower ..........................................29

Finding Direct Current Motor Horsepower ........................................30

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AMPACITY WIRE SIZING ....................................................................30

Wire Sizing Based on Insulation Rating ............................................31

Re-Sizing Wire Based on Different Insulation Ratings ......................32

Wire Sizing Based on Ambient Temperature ....................................32

Wire Sizing Based on Material Type .................................................34

Sizing Parallel Conductors ................................................................35

Finding Derated Wire Size ................................................................36

Sizing Temperature-Adjusted Derated Wires ....................................36

VOLTAGE DROP ..................................................................................38

Finding Single-Phase Voltage Drop ..................................................38

Finding Three-Phase Voltage Drop ...................................................39

Finding Voltage Drop Wire Size ........................................................40

Finding Voltage Drop Distance .........................................................41

Finding Voltage Drop Resistance ......................................................43

GROUND CONDUCTOR WIRE SIZE ..................................................44

EQUIPMENT GROUNDING COUNDUCTOR WIRE SIZE ...................45

FUSE AND CIRCUIT BREAKER SIZE .................................................45

STARTER SIZE ....................................................................................47

OVERLOAD PROTECTION SIZE .....................................................47

CONDUIT SIZE ...................................................................................48

Finding Motor Branch-Circuit Wire Size and Conduit Size —

Same Wire Type and Size ................................................................49

Finding Conduit Sizes For Multiple Conductors —

Same Wire Type and Size ................................................................50

Finding Number of Wires in Existing Conduit —

Same Size, Various Types ..............................................................51

Finding Conduit Size —

Multiple Conductors, Different Wire Sizes and Types .......................52

CONVERTING KILOWATT-HOUR AND BTU ...................................53

PARALLEL RESISTANCE ..................................................................54

APPENDIX A — DEFAULT SETTINGS .............................................55

APPENDIX B — PREFERENCE SETTINGS ..................................56

APPENDIX C — 2017 NEC REFERENCES ......................................57

APPENDIX D — CARE INSTRUCTIONS ..........................................57

APPENDIX E — ACCURACY/ERRORS,

AUTO SHUT-OFF, BATTERIES, RESET ...........................................58

REPAIR AND RETURN ....................................................................60

WARRANTY ......................................................................................61

2 — ElectriCalc ® Pro


ELECTRICALC

®

PRO

The ElectriCalc ® Pro is an invaluable calculator for today’s busy electrical professional. Unlike a regular calculator, it has intuitively labeled “electrical keys” and conforms to the 2017 (and 2014, 2011,

2008, 2005, 2002, 1999, 1996) and future National Electrical Codes, allowing you to solve Code-related problems quickly and accurately.

The most common NEC tables are now at your fingertips.

An important feature of the ElectriCalc ® Pro is that it is programmed to accept future NEC changes, allowing you to conveniently install future Code editions in a few simple steps.

The ElectriCalc ® Pro instantly solves for:

• Kirchhoff’s Law

• Ohm’s Law

• Volts, Amps, Volt-Amps, Watts, kVA, kW, PF%, EFF%, and Resistance

• Copper and Aluminum Wire Sizes

• Parallel and Derated Wire Sizes

• Voltage Drop Wire Sizes, % and Actual Voltage Drops,

Voltage Drop Distances and Wire Resistances

• Kilowatt hours and BTU’s

• Parallel Resistance

• Grounding Conductors Sizes

• Motor Full-Load Amps

• Overload Protection Sizes

• NEMA Starter Sizes

• Conduit Sizes

• And much more!



GETTING STARTED

You may want to practice getting a feel for your calculator keys by reading through the key definitions and learning how to enter data, how to store values, etc., before proceeding to the examples.

KEY DEFINITIONS

Basic Function Keys





On/Clear Key — Turns on power. Pressing once clears the last entry and the display.

Pressing twice clears all temporary values.

Off — Turns all power off. Clears all nonpermanent values.

  

 



-

 and 

Arithmetic operation keys.

Keys used for entering numbers.





Set — Used with other keys to access secondary functions.

Store — Used for storing values.

Storage Registers M1 through M9 — Used to store values in Memory registers 1 through 9.



 



 

 

 

Recall — Used with other keys to recall stored values and settings.

Memory Clear — Clears Accumulative Memory and displays total.

Accumulative Memory (M+) — Adds displayed value to Accumulative Memory.

Memory Recall — Displays the value saved in the Accumulative Memory register.



 



Memory Clear (M-R/C) — Clears Accumulative

Memory without changing current display.

Percentage — Used to find a given percent of a number.

x 2 — Squares the value on the display.

 



 

Backspace Function — Used to delete entries one keystroke at a time (unlike the



function, which deletes the entire entry).

Square Root (

!

) — Calculates the Square

Root of the number on the display.

 

 

Reciprocal (1/ x ) — Finds the Reciprocal of a number (e.g.,     0.125

).

Clear All — Returns all stored values to the default settings. Does not affect Preference Settings.

 

Change Sign (+/–) — Toggle displayed value between negative and positive value.

  Pi — Displays value of

π

(3.1415927).

Mode Set-up Keys

 

 

Preference Settings (Prefs) — Use to define calculator modes (see Preference

Settings section).

Single-Phase (1Ø) — Sets calculator to Single-

Phase mode.

 

Three-Phase (3Ø) — Sets calculator to

Three-Phase mode. This is the default setting.

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 

 

 

 

 

 

Ambient Temperature (Amb°) — Temporarily enters ambient temperature for determining ampacity-derived Wire Sizes. Ambient temperature will only change when entering a new value or by pressing   . Defaults to 30°C (86°F).

Amb will display when the Ambient Temperature is other than 30°C (86°F).

Note: The temperature units can be displayed in

Celsius (°C) or Fahrenheit (°F) by changing the

Preference Setting (see Preference Settings section).

Copper/Aluminum (Cu/Al) — Used to toggle between Copper (default) and Aluminum

Wire Types. When the Wire Type is revised, any calculated Wire Size will be re-calculated automatically. If a Wire Size is entered with the wrong Wire Type, pressing   will change the material type without changing the size.

Free Air (FrAir) — Sets calculator to Free Air mode, which refers to NEC Table 310.15(B)(17) for Wire Size calculations.

60°C Wire Insulation — Sets calculator to 60°C

Wire Insulation Type for Wire Size calculations.

This is the default setting.





Electrical Keys

 kilo- — Used with Watts, Amps, Volts, and

Volt-Amps keys to identify “kilo-” values.



 









 

 

 

 

 milli- — Used with Watts, Amps, Volts, and

Volt-Amps keys to identify “milli-” values.

Amps — Enters or calculates Amps (using Volts and VA or Watts).

Volts — Enters or calculates Volts (using

Amps, HPth, and VA or Watts). Default value is 240 Volts.

Volt-Amps — Enters or calculates Volt-Amps

(using Amps, Volts and Horsepower or Watts).

Watts — Enters or calculates Watts (using Amps,

Volts, and VA or Horsepower).

DC Amps (Idc) — Enters or calculates DC Amps

(using DC Volts and Resistance).

DC Volts (Vdc) — Enters or calculates DC Volts

(using DC Amps and Resistance).

DC Resistance (R) — Calculates and displays

DC Resistance in Ohms (using DC Volts and

DC Amps).

Power Factor (PF%) — Enters or calculates

Power Factor percentage (based on Watts and VA). Default value is 100%. Entered or calculated Power Factors greater than 100% will result in an error.

Theoretical Horsepower — Enters or calculates

Theoretical Horsepower (based on Amps, VA,

Watts, Efficiency%, PF%, and/or Volts). 1.0 HPth correlates to 746 Watts at 100% Efficiency.


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 

 

 

Efficiency (Eff%) — Enters or calculates the percent ratio between real power (Watts) and

Theoretical Horsepower. Default value is 100%.

Entered or calculated Efficiencies greater than

100% will result in an error.

Kilowatt–Hours to BTU (Kw-hr ► Btu) —

Calculates BTU (British Thermal Unit) based on an entered Kilowatt-Hour value.

BTU to Kilowatt–Hours (Btu ► Kw-hr) —

Calculates Kilowatt-Hours based on an entered

BTU (British Thermal Unit) value.

 

Parallel Resistance (Par Res) — Calculates total Resistance based on an entered series of

Parallel Resistor values.

Motor Keys

The ElectriCalc Pro can be used to determine motor Full-Load Current

(Amps) based on entries for Motor Horsepower (HPmotor), Phase and Voltage. You can also find an equivalent Motor Horsepower if you have entered Voltage and Full-Load Current values. Only HP Motor and Voltage entries as defined by NEC Tables 430.247, 430.248 and

430.250 can be used to determine motor loads.

 

Induction/Synchronous/DC Motor Toggle (Ind/

Sync/DC) — Used to scroll though Induction,

Synchronous, and Direct Current Motor Types.



Motor Horsepower — Enters or calculates

Motor Horsepower.

 

Starter Size (Starter) — Displays the Starter

Size (from NEMA publication ICS 2-1988 Tables

2-327-1 and 2-327-2) based on the Phase,

Voltage, and Motor Horsepower settings.

Note: Horsepower values not identified in NEMA tables will cause the calculator to round up to the next larger Starter Size in the table.



Wire Sizing Keys

The ElectriCalc Pro uses NEC Table 310.15(B)(16) (310.15(B)(17) for Free Air) to find Wire Sizes and Ampacity ratings of wires. The calculator uses the following data to calculate Wire Size:

1) Insulation temperature rating (60°C, 75°C and 90°C)

2) Wire material (Copper or Aluminum)

3) Ambient Temperature

Standard AWG Wire Sizes and Circular Mils are used by the

ElectriCalc Pro . Wire Size entries less than or equal to 2,000 are accepted as AWG Wire Sizes; entries greater than 2,000 are accepted as Circular Mil entries and display the corresponding AWG

Wire Size. Entries must match the standard Wire Sizes or Circular

Mils; otherwise, nonE will be displayed (invalid entry).

Note: 1/0, 2/0, 3/0 and 4/0 wires are entered using the  key

(e.g., 0, 00, 000 and 0000).



Wire Size/Ampacity — Enters or calculates Wire

Size based on Ampacity and Voltage Drop, if a

Voltage Drop Length has been entered.

♦ First Press

If a Wire Length has been entered, the first press will show the larger of the Ampacity or

Voltage Drop derived Wire Size. The calculator will use the larger value when calculations require a Wire Size. If no Voltage Drop Length has been entered, the calculator will display the calculated Ampacity-rated Wire Size.

♦ Second Press

If a Wire Length has been entered, the second press displays the smaller of the two Wire

Sizes. If not solving for Voltage Drop Wire Size, then displays the maximum Ampacity.

♦ Third Press

Displays the Wire Size in Circular Mils.

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 



 

♦ Fourth Press

If a Wire Length has been entered, displays the minimum Wire Ampacity rating. If no Wire

Length has been entered, displays the NEC table referenced for the calculation.

125% Ampacity (125%) — Used for Motor Wire

Sizing when the Wire must not exceed 80% of its rated Ampacity (125%A). This keystroke calculates

Wire Size based on 125% of the entered or calculated Amps value.

Parallel Size — Used to find the size of parallel conductors using Amperage and an entered quantity of Wires. Parallel Wire Size calculations smaller than 1/0 will display nonE , as the NEC does not allow Parallel Wire runs smaller than 1/0.


When preceded by a number, calculates the applicable Wire Size for that quantity of

Wires in parallel.


Displays the maximum adjusted Ampacity of the calculated Parallel Wire Size.

Note: No adjustments are made for deration.

Derated Wire Size (D/R Size) — Used to calculate Derated Wire Sizes and allowable

Ampacity based on the entered quantity of wires,

NEC Table 310.15(B)(16) and NEC Table

310.15(B)(3)(a). Derated Wire Sizes are not calculated when there are less than four Wires, or when the unit is in Free Air mode.


Calculates the Derated Wire Size, if you have entered the number of Wires.




Displays the maximum adjusted Ampacity of the Derated Wire Size.


Displays the Derated Adjustment Factor per the NEC Table 310.15(B)(3)(a).


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.




Enters a maximum allowable Voltage Drop percentage or calculates actual Voltage Drop.


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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 

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.


Calculates the copper Grounding electrode conductor size if you have entered a valid

Wire Size.


Displays the aluminum Grounding electrode conductor size.


Displays the Circular Mil area used to calculate the Grounding electrode conductor size.



 

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.


Displays the copper Grounding conductor size for the entered Amp rating.




Displays the aluminum Grounding conductor size.



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 —


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.


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 



 


Displays the Full-Load Current percent multiplier value used to determine the Overload current protection size. Subsequent presses of

 repeat the cycle.

Motor Type (M-Type) — Based on NEC Table

430.52, this function selects the Motor Type used to define the percent factors for Breakers/Fuses.

Once set, the Motor Type remains fixed until you change it or perform a Clear All

(   ).


Displays the current Motor Type. Note there is no Motor Type in Single-Phase mode.


In Three-Phase mode only, subsequent presses of



will select and display the next Motor Type from this list: SQ-C non-b

(Squirrel Cage, non-Design B), SQ-C b

(Squirrel Cage, Design B), SYNC no codE

(Synchronous), WND no codE (Wound Rotor).

Dual Element Fuse —


Calculates the minimum Amp rating for a

Dual Element Fuse.


Displays the Full-Load Current percent multiplier used to determine Fuse size.

Single Element Fuse (SEFuse) —


Displays the minimum Amp rating based on

Phase, Motor Type, and Amperage.






Displays the Full-Load Current percent multiplier value used to determine Fuse size.

Subsequent presses repeat this cycle.

Inverse Time Breaker —


Displays the minimum Amp rating for an

Inverse Time Breaker, based on the Phase,

Motor Type, and Amperage.


Displays the Full-Load Current percent multiplier value used to determine Breaker Size.

Instantaneous Trip Circuit Breaker (InsTrip) —

 


Displays the minimum Amp rating for an

Instantaneous Trip Circuit Breaker, based on the Phase, Motor Type, and Amperage.


Displays the Full-Load Current percent multiplier value used to determine Breaker Size.

Conduit Sizing Keys

The ElectriCalc Pro calculates Conduit Size using NEC Tables 1, 4 and 5 of Chapter 9 (given Insulation Type, Wire Size, and quantity of Wires). It will also calculate the Number of Wires of a specified

Insulation Type and Wire Size that will fit in a defined Conduit Size.

Acceptable Conduit Sizes (depending on the type of Conduit used) are as follows: 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2",

4", 5", and 6". Conduit Sizes are entered using decimal equivalents

(e.g., 1-1/2" is entered as 1.5, 3/4" is entered as 0.75, etc.).


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 ,  ,





Number of Wires — Used to enter or calculate the Number of Wires in a raceway and calculate cross-sectional Wire Area.


Enters Number of Wires or calculates maximum Number of Wires in Conduit.


Shows total cross-sectional area for all entered Wires.


Shows total cross-sectional area of all entered

Wires of the selected Wire Insulation.

Conduit Size — Used to find Conduit Sizes based on the total area of the entered Wire

Types and Wire Sizes (up to 10 at one time). If the quantity and Insulation Type have not been entered, the calculator will assume 2 THHN Wires for Single-Phase or 3 THHN Wires for Three-

Phase calculations.


Enters or calculates Conduit Size.

Note: If a Wire Size has not been entered or calculated, or an invalid Conduit Size is entered, the calculator will display nonE .


Shows Total Number of Wires in the Conduit for calculated Conduit Size. Shows the Conduit internal Area for an entered Conduit.

Note: Third through fifth presses will only be displayed for calculated Conduit Sizes.



 



Shows Fill Percentage for the calculated

Conduit Size as determined by NEC

Table 1, Chapter 9.


Shows the Total Wire Area for all entered Wires.

♦ Fifth Press

Shows Remaining Fill Area. This value may be negative if all Wires are the same size due to

Note 7 in NEC Chapter 9, Table 1.

Conduit Type (Cond Type) — Used to select the desired Conduit Type. Pressing these keys with a value between 1 and 12 will select the corresponding Conduit Type, as specified in the list below (i.e.,

  

selects the EMT

Conduit).


Displays the currently selected Conduit Type.

Continuous presses of

 

scroll through the available Conduit Types.

1) EMT (Electrical Metal Tubing)

2) ENT (Electrical Nonmetallic Tubing)

3) FMC (Flexible Metal Conduit)

4) IMC (Intermediate Metal Conduit)

5) LFNB (Liquidtight Flexible Nonmetallic

Conduit-B)

6) LFNA (Liquidtight Flexible Nonmetallic

Conduit-A)

7) LFMC (Liquidtight Flexible Metal Conduit)

8) RMC (Rigid Metal Conduit)

9) P-80 (Rigid PVC Conduit, Schedule 80)

10) P-40 (Rigid PVC Conduit, Schedule 40)

11) P-A (Rigid PVC Conduit, Type A)

12) P-EB (Rigid PVC Conduit, Type EB)


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PREFERENCE SETTINGS

Press



, then



to access the Preferences menu. Continue pressing



to scroll through different Preferences. Press



or

 keys to scroll through options of the different Preferences. Press

 to exit Preferences. Your calculator will keep your Preference

Settings until a Full Reset alters your settings to the default values

(see Appendix for more information).

KEYSTROKE DISPLAY

  (Prefs )

(NEC Code)















 (repeats options)

Second press of  :

(Ambient Temperature Units)

NEC 2017

NEC 1996

NEC 1999

NEC 2002

NEC 2005

NEC 2008

NEC 2011

NEC 2014

NEC 2017



AMBº 30. ºC*

AMBº 86. ºC*

  (repeats options) AMBº 30. ºC*

* These values will differ if you have changed the Ambient Temperature.

Third press of

(Length Units)

 :

FEET 1.



  (repeats options)

MET 1.

FEET 1.



BASIC MATH OPERATIONS

This calculator uses standard chaining logic, which simply means that the entered mathematical string is evaluated from left to right without any priority given to different operators.

KEYSTROKE

   

   

   

   

DISPLAY

6.

1.5

5.

1.

PERCENT CALCULATIONS

The  key can be used for finding a given percentage of a number or for working add-on, discount or division percentage calculations.

KEYSTROKE

      

       

    

      

DISPLAY

53.25

266.25

23.75

200.

The  key also allows you to change percentages to decimals

(e.g.,    displays 0.25

).

MEMORY OPERATIONS

Whenever the

 

keys are pressed, the displayed value will be added to the Cumulative Memory. Other Memory functions:

FUNCTION

Add to Memory

Subtract from Memory

Recall total in Memory

Display/Clear Memory

Clear Memory

KEYSTROKE

 

  

 

 

 

(cont’d)



(cont’d)

Memory is semi-permanent, clearing only when you do one of the following:

– turn off the calculator

– press  

– press  

– press   (Clear All).

When memory is recalled (

 

), consecutive presses of



will display the calculated Average and total Count of the accumulated values.

Using M+


     (M+)

     (M+)

      (M-)

 





 

M+ 355.

M+ 255.

&

&

M- 745. &

TTL – 135. &

AVG – 45.

CNT 3.

&

&

– 135.

Using Memory Storage Keys (M1- M9)

In addition to the standard cumulative Memory (as previously described), your calculator has nine independent Storage

Registers – M1 through M9 – that can be used to permanently store single, non-cumulative values. The following example shows the use of M1 (   ). To use M2 through M9, replace the presses of the  key with presses of the corresponding number key (  through  ).

You can replace a value in one of these Memory registers by storing a new value in place of the stored value.



FUNCTION

Store single value in M1

Clear M1

Recall M1

KEYSTROKE

 

  

 

Store 175 into M1, recall the value, and then clear the value.


    

 

 

  

M-1 175.

0.

M-1 175.

M-1 0.

USING THE ELECTRICALC PRO

KIRCHHOFF’S LAW

The ElectriCalc Pro utilizes Kirchhoff’s Law in finding Volts, Amps,

Volt-Amps, Watts, Horsepower (theoretical), Efficiency and Power Factor.

Finding Voltage

Find the Voltage supply to a Single-Phase load drawing 14,605 Voltamps and 115 Amps.


  0.

1. Set to 1-Phase:

  (1Ø) 1 Ø

1 PH

2. Enter VA:

      VA 14,605.

3. Enter Amps:

    AMPS 115.

4. Solve for Volts:

 VOLT 127.



Finding Amps

What is the current (Amps) for a load drawing 8,250 Volt-Amps on a 240 Volt, Three-Phase circuit?


  0.


  (3Ø) 3Ø

3 PH

2. Enter VA:

     VA 8,250.

3. Enter Volts:

   

4. Solve for Amps:

 AMPS 19.846416

Finding Current Load

A building with 120/240 Volt 1Ø service has the following loads:

Range = 7,800 VA Heating = 15,100 VA

Dryer = 5,100 VA Appliances = 8,900 VA

Lighting = 6,470 VA

What is the service load (Amps) of the circuit supplying this building?

KEYSTROKE

 

DISPLAY

0.


 

(1Ø)

2. Add VA loads:

    

     

    

    

    

VOLT 240.

1 Ø 1 PH

7,800.

22,900.

28,000.

36,900.

43,370.



KEYSTROKE

3. Enter as VA:



4. Enter Volts:

   




DISPLAY

VA 43,370.

VOLT 240.

AMPS 180.70833

Finding Amps From Kilowatts

What is the Amperage for a 75 kW load connected in a 120/208 Volt,

3Ø circuit?

KEYSTROKE

 

DISPLAY

0.


 

(3Ø)

2. Enter kilowatts:

   

3Ø PH

KW 75.

3. Enter Volts:

    VOLT 208.


 AMPS 208.17918

Finding Volt-Amps

What is the VA rating for a 120 Volt, 22 Amp, 1Ø circuit? What is the kVA rating?

KEYSTROKE

 

DISPLAY

0.


 

(1Ø)

1 Ø

1 PH

(cont’d)



(cont’d)

KEYSTROKE

2. Enter Volts:

   

3. Enter Amps:

  

4. Solve for Volt-Amps:



5. Solve for kVA:

 

DISPLAY

VOLT 120.

AMPS 22.

VA 2,640.

KVA 2.64

Finding kVA Rating

What is the kVA rating for a 120/208 Volt, Three-Phase,

65 Amp transformer?

KEYSTROKE

 


 

(3Ø)

2. Enter Volts:

   

DISPLAY

0.

3Ø

3 PH

VOLT 208.

3. Enter Amps:

   AMPS 65.

4. Solve for kVA:

  KVA 23.417327

Finding Wattage

A 120 Volt, Single-Phase, 45 Amp electrical motor has an 87%

Power Factor. What is its Wattage?


  0.



KEYSTROKE


  (1Ø)

2. Enter Volts:

   

3. Set Power Factor:

    (PF%)

4. Enter Amps:

  

5. Solve for Watts:



DISPLAY

1 Ø 1 PH

VOLT 120.

PF% 87.

AMPS 45.

WATT 4,698.

Finding kW Rating

What’s the kW rating for a 90 Amp, 208 Volt, Three-Phase boiler with

100% Power Factor?


  0.


 

(3Ø)

2. Set Power Factor:

    

(PF%)

3. Enter Amps:

  

3Ø 3 PH

PF% 100.

AMPS 90.

4. Enter Volts:

    VOLT 208.

5. Solve for kW:

  KW 32.423991



1/17/2017 2:30:45 PM

OHM’S LAW

The ElectriCalc Pro ’s built-in Ohm’s Law functions allow you to easily solve for Voltage (Volts), Current (Amps), or Resistance (Ohms) by entering in any two variables (e.g, Volts and Amps) and solving for the third (e.g., Ohms).

Ohm’s Law: V = I x R

The Ohm’s Law functions on the ElectriCalc Pro are identified as follows:

• Vdc = Voltage, in Volts

• Idc = Current, in Amps

• R = Resistance, in Ohms

Finding Volts

The Current in a circuit is 0.0125 Amps, and the total Resistance is

480 Ohms. Find the Voltage.


  0.

1. Enter Current:

       (Idc)

2. Enter Resistance:

     (R)

3. Find Voltage:

  (Vdc)

Idc 0.0125

A

OHMS 480.

Vdc 6.

V

Finding Amps

A 120k electrical resistor is plugged into a 12 volt circuit. Find the

Current (in Amps).


  0.

1. Enter Resistance:

      (R) KOHM 120.




2. Enter Voltage:

    (Vdc)

3. Find Current:

  (Idc)

Finding Resistance (Ohms)

Vdc 12.

V

Idc 0.0001

A

An electrical circuit operating at 240 Volts has a Current of 14.6

Amperes. Find the total Resistance (in Ohms) of the circuit.


  0.

1. Enter Voltage:

     (Vdc)

2. Enter Current:

      (Idc)

3. Find Resistance:

  (R)

Vdc 240.

V

Idc 14.6

A

OHMS 16.438356

MOTOR FUNCTIONS

The ElectriCalc Pro can calculate the Full-Load Current (Amps) of a motor, based on Phase, Voltage and Motor (Synchronous, Induction, or DC) Horsepower. It uses NEC Tables 430.247, 430.248 and

430.250 to determine the motor Full-Load current. (If you enter a value for HP or Voltage that does not correspond to these tables, the unit will display nonE ).

The ElectriCalc Pro can also calculate an equivalent Horsepower for an Induction, Synchronous or Direct Current motor based on a

Voltage, Phase and Full-Load Current. When calculating Motor HP from an entered Amperage, a result not directly matching a value in

NEC Table 430.247, 430.248 or 430.250 will cause the calculator to choose the next higher table value for Motor Horsepower.



1/17/2017 2:30:45 PM

Finding Single-Phase Full-Load Current

A 2 HP Induction motor operates on 230 Volt, Single-Phase power.

What is the Full-Load Current for this motor?


  0.


  (1Ø)

2. Enter Volts:

   

1 Ø 1 PH

VOLT 230.

3. Enter HP:

  IND* 2. HP

* If IND is not shown, press   until IND is displayed in the upper left area of the display.

4. Find Full-Load Current:

 FLC 12.

A

Finding Motor Wire Size and Ampacity

Find the Wire Size required to connect a continuous run, 3Ø, 10 HP

Induction motor into a 230V circuit.


  0.


  (3Ø) 3Ø 3 PH

2. Set to 60º C:

  (60º)

3. Set to Copper (if necessary):

  (Cu/Al)

4. Enter Volts:

   

3Ø 60 3 PH

3Ø 60 Cu 3 PH

VOLT 230.



KEYSTROKE




DISPLAY

5. Enter HP:

   IND* 10. HP


FLC 28.

A

7. Find 125% Ampacity Wire Size:

  (125%) AWG 8 CU WIRE SIZE 125%

8. Find max Ampacity:

 8* 40.0

WIRE A125%

* The Wire Size will be shown in the upper left area of the display when displaying the Wire Ampacity rating.

Finding Synchronous Motor Horsepower

A Synchronous motor is defined as having a 27 Amp load on a 240

Volt, 3Ø circuit. What is its Horsepower?


  0.


  (3Ø) 3Ø 3 PH

2. Set to Synchronous motor:

  *(Ind/Sync/DC) SYNC 0.

* If necessary, continue pressing   until the desired Motor Type is displayed.

3. Enter Volts:

    VOLT 240.

4. Enter Amps:

   AMPS 27.

(cont’d)



(cont’d)


5. Solve for HP:

 SYNC 25. HP

6. Set to Induction motor:

    (Ind/Sync/DC)

Finding Direct Current Motor Horsepower

IND 0.

A Direct Current motor is defined as having a 10 Amp load on a 180

Volt circuit. What is its Horsepower?

KEYSTROKE

 

DISPLAY

0.

1. Set to DC motor:

    *(Ind/Sync/DC) DC 0.

* If necessary, continue pressing   until the desired Motor Type is displayed.

2. Enter Volts:

    VOLT 180.

3. Enter Amps:

   AMPS 10.

4. Solve for HP:

 DC 2. HP

5. Set to Induction motor:

  (Ind/Sync/DC) IND 0.

AMPACITY WIRE SIZING

The required Wire Size of a service conductor can be determined based on the specified electrical requirements and the  key. The

Wire Size is automatically recalculated whenever the Wire Insulation

(temperature) ratings or Wire material (Copper or Aluminum) types are revised. Wire Sizing is based on the requirements defined in NEC

Tables 310.15(B)(16) and 310.15(B)(17).



Wire Sizing Based on Insulation Rating

Wiring is being installed in a 240 Volt, Single-Phase system rated at

30 kVA. What is the Wire Size needed if you use 60° C Copper wire?


  0.


  (1Ø) 1 Ø 1 PH

2. Set to 60º C:

  (60º)


  (Cu/Al)

4. Enter kVA:

   

1 Ø 60 1 PH

1 Ø 60 Cu 1 PH

KVA 30.

5. Enter Volts:

    VOLT 240.

6. Find Amps:

 AMPS 125.

7. Find Wire Size:

 AWG 0 CU WIRE SIZE

8. Display Wire Ampacity:

 Ø* 125.0

WIRE A


9. Display CMIL:

 CMIL 105,600. WIRE

10. Display NEC Table:

 NEC 310.15.b.16



1/17/2017 2:30:46 PM

Re-Sizing Wire Based on Different Insulation Ratings

What Wire Size is required for a 3Ø, 75°C Copper branch circuit carrying a load of 260 Amps? What would the Wire Size be if 90°C Copper is used?


  0.


  (3Ø) 3Ø 3 PH

2. Set to 75º C:

  (75º)


  (Cu/Al)

4. Enter Amps:

   

3Ø 75 3 PH

3Ø 75 Cu 3 PH

AMPS 260.



6. Change to 90º C:

  (90º) 3Ø 90 Cu AWG 0000 CU WIRE SIZE

Wire Sizing Based on Ambient Temperature

Find the 90°C Copper Wire Size needed to connect a 47,700

Volt-Amp load to a 240 Volt, Single-Phase source. What is the adjusted Wire Size, if the Ambient temperature rating is changed from the default 30°C to 20°C?


0.

 


  (1Ø) 1 Ø 1 PH




2. Set to 90º C:

  (90º)


  (Cu/Al)

1 Ø 90 1 PH

1 Ø 90 Cu 1 PH

4. Enter VA:

      VA 47,700.

5. Enter Volts:

    VOLT 240.

6. Find Amps:

 AMPS 198.75



8. Change Ambient temperature:

    (Ambº) 1Ø 90 Cu Amb AMB° 20. ºC

9. Find adjusted Wire Size:



 ØØ* 210.6 WIRE A


11. Display CMIL:



12. Display NEC table:



13. Reset Ambient Temperature and Clear:

    

CMIL 133,100.

WIRE

NEC 310.15.b.16

1Ø 90 Cu 0.



1/17/2017 2:30:47 PM

Wire Sizing Based on Material Type

Find the Wire Size for a 75°C Copper Wire carrying a 3Ø load of 265

Amps. What is the equivalent Aluminum Wire Size?


  0.


  (3Ø) 3Ø 3 PH

2. Set to 75º C:

  (75º)


  (Cu/Al)

4. Enter Amps:

   

3Ø 75 3 PH

3Ø 75 Cu 3 PH

AMPS 265.



6. Change to Aluminum:

  (Cu/Al) 3Ø 75 Al AWG 400 AL WIRE SIZE


 4ØØ* 270.0 WIRE A


8. Display CMIL:

 CMIL 400,000. WIRE


 NEC 310.15.b.16



Sizing Parallel Conductors

What size 60°C insulated Copper Wire is required for a single conductor carrying a 500 Amp load in a Free Air environment (30°C

Ambient Temperature)? What size for two Parallel conductors? For three conductors?


  0.

1. Set to 60º C:

  (60º) 60 0.


  (Cu/Al)

3. Set to Free Air mode:

  (FrAir)

4. Enter Amps:

   

60 Cu 0.

60 Cu FrAir 0.

AMPS 500.

5. Find Wire Size for one conductor:


6. Find Wire Size for two conductors:

  PAR 000 CU WIRE SIZE

7. Find Wire Size for three conductors:

  PAR 0 CU WIRE SIZE

8. Exit Free Air Mode and Clear:

   60 Cu

0.

Note: Parallel Wire Sizes smaller than 1/0 will be displayed as nonE .



1/17/2017 2:30:47 PM

Finding Derated Wire Size

What is the Derated Wire Size required for nine 75°C Copper wires, each carrying a maximum load of 65 Amps?


  0.

1. Set to 75º C:

  (75º)


  (Cu/Al)

3. Enter Amps:

  

75 0.

75 Cu 0.

AMPS 65.

4. Find normal Wire Size:


5. Find Derated Wire Size:

   (D/R Size)




D/R 3 CU WIRE SIZE

D/R 45.5 WIRE A

7. Display Adjustment Factor:

 ADJ 70. %




Sizing Temperature-Adjusted Derated Wires

NEC 310.15.b.3

A circuit was built with 60°C Copper wire connecting a 47,650 Volt-

Amp load to a 240 Volt, Three-Phase source. Ambient Temperature is 50°C. What is the Derated Wire Size required if eight currentcarrying THHN wires are installed in the raceway?


  0.



KEYSTROKE


  (3Ø)

2. Set to 60º C:

  (60º)


  (Cu/Al)

4. Enter Volt-Amps:

     

DISPLAY

3Ø

3 PH

3Ø 60 3 PH

3Ø 60 Cu 3 PH

VA 47,650.

5. Enter Volts:

   

7. Find Adjusted Wire Size:



VOLT 240.

6. Set to 50º C Ambient Temperature:

    (Ambº) 3Ø 60 Cu Amb AMB° 50. ºC

AWG 250 CU WIRE SIZE

8. Find Derated Wire Size:

   (D/R Size)




D/R 500 CU WIRE SIZE

D/R 46.5 WIRE A

10. Display Adjustment Factor:

 ADJ 41. %


 NEC 310.15.b.3

12. Reset Ambient Temperature and Clear:

     3Ø 60 Cu 0.



1/17/2017 2:30:47 PM

VOLTAGE DROP

The reduction in Voltage between the power source and the load can be determined 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 (



) once you have entered or calculated the

Phase, Volts, Amps, Wire Type, Voltage Drop Wire Size, and allowable VD percentage. The ElectriCalc Pro uses Resistance values found in NEC Table 8 Chapter 9 to determine Voltage

Drop.

Note: Voltage Drop solutions may vary slightly from actual AC circuit measurements, as the calculator does not incorporate factors such as inductive reactance, skin effect, raceway material, etc. In most situations, the DC Voltage Drop calculation method is sufficient to meet safety standards for AC systems.

IMPORTANT NOTE ON VOLTAGE

DROP CALCULATIONS

The ElectriCalc Pro calculates Voltage Drop and Wire Size using DC

Resistance as defined by the 2017 NEC. To find the Voltage Drop for a specific Wire Size, you must first enter Amps and the one-way wire Length (and other required variables), entering the specific Wire

Size last. Otherwise, for your safety, the calculator will recalculate the Wire Sizes based on the NEC Ampacity Tables and maximum allowable Voltage Drop.

Finding Single-Phase Voltage Drop

You are installing 175 Feet of 75°C, #8 THW branch circuit Copper conductors to supply an 11A load on a 208V 1Ø system. What is the source Voltage Drop at the load?



KEYSTROKE

 

DISPLAY

0.


  (1Ø)

2. Set to 75 º C:

  (75º)


  (Cu/Al)

4. Enter Amps:

  

1 Ø 1 PH

1 Ø 75 1 PH

1 Ø 75 Cu

1 PH

AMPS 11.

5. Enter Volts:

    VOLT 208.

6. Enter Length:

    FEET 175.

7. Enter Wire Size:

  *

8. Solve Voltage Drop:




DROP 3.0 V

9. Solve percent Voltage Drop:

 DROP 1.4 % V

* Wire size can also be entered in Circular Mils (e.g.,

       enters 16,510 CMILs and displays

8 AWG Wire Size).

Finding Three-Phase Voltage Drop

A 20 Amp, Three-Phase load is being fed by a 230 Volt source located 150 Feet away. The installation specifications require 75°C

#10 THW stranded Copper conductor. What is the Voltage Drop on this branch circuit?

(cont’d)



(cont’d)

KEYSTROKE

 


  (3Ø)

2. Set to 75 º C:

  (75º)


  (Cu/Al)

4. Enter Amps:

  

DISPLAY

0.

3Ø 3 PH

3Ø 75 3 PH

3Ø 75 Cu 3 PH

AMPS 20.

5. Enter Volts:

    VOLT 230.

6. Enter Length (Feet):

    FEET 150.


   AWG 10 CU WIRE SIZE

8. Solve Voltage Drop:

 DROP 6.4 V

9. Solve percent Voltage Drop:

 DROP 2.8 % V

Finding Voltage Drop Wire Size

A 20 Amp, Three-Phase 208 Volt load will be located 175 Feet away from the source. Assuming a 3% allowable Voltage Drop, what is the size of 75°C conductor required for this branch circuit? What is the resulting voltage drop?


  0.


  (3Ø)


3Ø

PH


KEYSTROKE

2. Set to 75º C:

  (75º C)


  (Cu/Al)

4. Enter Amps:

  

DISPLAY

3Ø 75 3 PH

3Ø 75 Cu

3 PH

AMPS 20.

5. Enter Volts:

    VOLT 208.

6. Enter Length:

    FEET 175.

7. Enter allowable VD%:

  DROP 3.0 % V


 AWG 8 CU VD WIRE SIZE

9. Find actual Voltage Drop:



10. Find percent Voltage Drop:

 DROP 2.3 % V

Finding Voltage Drop Distance

How far from a Three-Phase 240 Volt source can you install a 15 Amp load using 60°C #10 Copper branch circuit conductors? Assume a 3% allowable Voltage Drop.

KEYSTROKE

 


  (3Ø)

DROP 4.7 V

DISPLAY

0.

3Ø 3 PH

(cont’d)



(cont’d)

KEYSTROKE

2 Set to 60º C:

  (60º)


  (Cu/Al)

4. Enter Amps:

  

5. Enter Volts:

   


   *

7. Enter 3% allowable Voltage Drop:

 

8. Find distance:



9. Find actual Voltage Drop:



10. Find percent Voltage Drop:



DISPLAY

3Ø 60 3 PH

3Ø 60 Cu 3 PH

AMPS 15.

VOLT 240.


DROP 3.0 % V

FEET 234.86987

DROP 7.2 V

DROP 3.0 % V


      enters 10,380 CMILs and displays 10 AWG

Wire Size).

Note: The calculator automatically makes adjustments for Resistance using NEC Chapter 9, Table 8, if the Insulation Type is other than 75°C.



Finding Voltage Drop Resistance

What is the Resistance of 85 Feet of #2 90° C Copper conductor?


  0.

1. Set to 90º C:

  (90º) 90 0.


  (Cu/Al)


  *

90 Cu 0.


4. Find Resistance:

  (Wire Res)

5. Find 85-foot Resistance**:

        

OHMS 0.2033993 WIRE

0.0172889



Wire Size).

** Given Resistance per 1,000 Feet, divide by 1,000 to get a per

Foot Resistance, then multiply by 85.



1/17/2017 2:30:48 PM

GROUND CONDUCTOR WIRE SIZE

You can use single or multiple service entrance conductor(s) to find the grounding electrode conductor for AC systems. When using multiple conductors, the ElectriCalc Pro uses the equivalent Circular

Mils to find the Grounding electrode conductor (based on NEC

Table 250.66).

Find the Grounding electrode conductor Wire Size required when

2/0 is the largest 3-Phase 75°C Copper service-entrance conductor being used. What is the equivalent Aluminum size? What is the equivalent Circular Mils?


  0.

1. Enter Wire Size and find Ground Wire Size:

   GRND 4 CU WIRE SIZE

2. Find Aluminum size:

 GRND 2 AL WIRE SIZE

3. Find Circular Mils:

 CMIL 133,100. WIRE


 NEC 250.66


       enters 133,100 CMILs and displays 4 GRND

Wire Size). If Wire Size is not entered using the  key, the calculation will be based on the Wire Size stored in the  key.



EQUIPMENT GROUNDING COUNDUCTOR WIRE SIZE

The

 keystroke can be used to find the Grounding conductor size for raceways and “over-current devices in circuit ahead” equipment. The calculator assumes the displayed value as

Amperage to solve for the Equipment Grounding conductor based on NEC Table 250.122.

Find the Equipment Grounding conductor size required when the circuit breaker is rated at 45 Amps. What is the equivalent

Aluminum size?

KEYSTROKE

 

DISPLAY

0.

1. Find Equipment Ground Wire Size:

    (EqGrnd)

2. Find Aluminum size:



EQPG 10 CU WIRE SIZE

EQPG 8 AL WIRE SIZE


 NEC 250.122

FUSE AND CIRCUIT BREAKER SIZE

Fuse and Breaker sizing is determined by NEC Table 430.52.

Once the Motor Type is defined via

L

, a Full-Load

Current amperage value can be used to find the Fuse Breaker Sizes.

What is the calculated Dual Element and Single Element Fuse size for a 230 Volt, 3-Phase, 50 HP Induction motor? What are the Instantaneous Trip and Inverse Time Circuit

Breaker requirements?

KEYSTROKE

 

DISPLAY

0.


(cont’d)


1/17/2017 2:30:48 PM

(cont’d)

KEYSTROKE


  (3Ø)

2. Enter Volts:

   

DISPLAY

3Ø

3 PH

VOLT 230.

3. Enter HP:

   IND* 50. HP





5. Find Dual Element Fuse size:



FLC 130. A

AMPS 227.5 dE

6. Display percent used:



7. Find Single Element Fuse size:

  (SEFuse)




%FLC 175. %

AMPS 390. SE

%FLC 300.

%

9. Find Inverse Time Circuit Breaker size:






AMPS 325. b2

%FLC 250.

%

11. Find Instantaneous Trip Circuit Breaker size:

  (InsTrip)




AMPS 1,040. b1

%FLC 800.

%



STARTER SIZE

What NEMA size Starter is required for a 575 Volt, 3Ø, 20 HP

Induction motor?

KEYSTROKE

 

DISPLAY

0.

1. Set to 3-phase:

  (3Ø)

2. Enter Volts:

   

3Ø 3 PH

4. Solve for Starter Size:

  (Starter)

VOLT 575.

3. Enter HP:

   IND* 20. HP


STAR SIZE 2

OVERLOAD PROTECTION SIZE

What Overload Protection device size is required for an Induction motor with a nameplate Current rating of 19.2 Amps and a 1.0 service factor? What is the required Overload rating at 125% (for a

1.15 service factor)?

KEYSTROKE

 

1. Enter nameplate Current:

    

DISPLAY

0.

AMPS 19.2

2. Find Overload size:

    AMPS 22.08 o l


 %FLC 115. %

(cont’d)



(cont’d)

KEYSTROKE

4. Find 125% Load:

   




6. Reset Overload rating and Clear:

    

DISPLAY

AMPS 24. o l

%FLC 125.

%

0.

CONDUIT SIZE

The ElectriCalc Pro can calculate the size of Conduit required when running single or multiple Wires using the

  key and the calculator’s internal tables. The calculator uses NEC values for area of THW/THHW, XHH/XHHW, and THHN/THWN wires. When using the actual Wire areas (and following the guidelines in NEC Chapter

9, Tables 1, 4 and 5), the calculator can calculate a Conduit Size based on the Conduit Type and the same or different Wire Types and Sizes.

To select a specific Conduit Type, enter the corresponding number of the Conduit as shown below and then press

  .

The types and their corresponding numbers are:

1) EMT

2) ENT

4) IMC

5) LFNB

7) LFMC

8) RMC

10) P-40

11) P-A

3) FMC 6) LFNA 9) P-80 12) P-EB

When you enter a new Conduit Type or scroll through the types, you will see the updated Conduit Size (if you have entered the

Wire Type and quantity).



Finding Motor Branch-Circuit Wire Size and Conduit Size —

Same Wire Type and Size

What size THHN Copper Wire and RMC Conduit are needed to connect a 10 HP 1Ø Induction motor to a 115 Volt source?


  0.


  (1Ø)

2. Set to 60º C:

  (60º)

1 Ø

1 PH

1 Ø 60

1 PH


  (Cu/Al)

4. Enter Volts:

   

1 Ø 60 Cu 1PH

VOLT 115.

5. Enter Horsepower:

   IND* 10. HP


6. Display Full-Load Amps:

 FLC 100. A

7. Find Wire Size at 125% Ampacity:

  (125%) AWG 0 CU WIRE SIZE 125%

8. Find Wire Ampacity:

 Ø* 125.0 WIRE A 125%


9. Enter Conduit Type and find Conduit Size:

   (Cond Type) RMC 1.25 in COND SIZE

(cont’d)



(cont’d)


10. Find total number of Wires:

 2. TTL WIRES

11. Find Conduit Fill Percent:

 FILL 24.3

% COND

12. Find actual Fill Area:

 FILL 0.3710

TTL WIRE AREA

13. Find Remaining Area:

 REM 0.1021

WIRE AREA

Note: If a Wire Size has been calculated or stored, and the Wire Type/ quantity is not defined, the calculator will assume 2 THHN wires for

1Ø and 3 THHN wires for 3Ø when calculating Conduit Size.

Finding Conduit Sizes For Multiple Conductors —

Same Wire Type and Size

Find the minimum IMC Conduit Size for eleven #6 THHN Copper wires.


  0.


  (Cu/Al)

2. Enter Conduit Type:

   (Cond Type)


  *

Cu 0.

IMC nonE COND


4. Enter # THHN:

   THHN 11. WIRES




5. Find Conduit Size:

 IMC 1.25 in COND SIZE

* Wire Size can also be entered in Circular Mils (e.g.,

      enters 26,420 CMILs and displays 6 AWG

Wire Size).

Finding Number of Wires in Existing Conduit —

Same Size, Various Types

Find the maximum number of #10 THHN Copper wires that can be pulled through an existing 3 inch EMT Conduit. How many XHHW wires? How many THW wires?


  0.


  (Cu/Al)


   (Cond Type)

Cu 0.

EMT nonE COND


   * AWG 10 CU WIRE SIZE

4. Enter Conduit Size:

  EMT 3.00 in COND SIZE

5. Find maximum THHN #:

 THHN 167. TTL WIRES

6. Find maximum XHHW #:

 XHHW 145. TTL WIRES

7. Find maximum THW #:

 THW 145. TTL WIRES

* Wire Size can also be entered in Circular Mils (e.g.,


Wire Size).



Finding Conduit Size —

Multiple Conductors, Different Wire Sizes and Types

Three 1/0 THWN 75°C conductors and one #2 XHHW 75°C Copper conductor are to connect to a panel board using a single Conduit.

What is the cross-sectional area of Wires, Conduit Size and actual fill Area?

Note : The cross-sectional Areas are the same for both THHN and

THWN; display will show as THHN.


  0.

1. Set to 75º C:

  (75º) 75 0.


  (Cu/Al)


   (Cond Type)

4. Enter first Wire Size:

  *

75 Cu 0.

FMC nonE COND


5. Enter number of THWN Wires:

  THHN 3. WIRES

6. Find cross-section Wire Area:

 THHN 0.5565 WIRE AREA

7. Enter second Wire Size:

  * AWG 2 CU WIRE SIZE

8. Enter number of XHHW Wires:

 

9. Find cross-sectional Wire Area:



XHHW 1. WIRE

XHHW 0.1146 WIRE AREA



KEYSTROKE

10. Find Conduit Size:



11. Find total number of Wires:



12. Find Conduit Fill Percent:



13. Find actual Fill Area:



14. Find Remaining Area:



DISPLAY

FMC 1.50 in COND SIZE

4. TTL WIRES

FILL 36.1 % COND

FILL 0.6711

TTL WIRE AREA

REM 0.0721

WIRE AREA


  5     enters 105,600 CMILs and displays 0 AWG

Wire Size;       enters 66,360 CMILs and displays 2

AWG Wire Size).

CONVERTING KILOWATT-HOUR AND BTU

Find the equivalent BTU rating of a 3.5 kilowatt-hour rated furnace.

KEYSTROKE

 

1. Enter kilowatt hours:

  

DISPLAY

0.

3.5

2. Find equivalent BTU:

  (Kw-hr ► Btu) BTU 11,953.552

What is the kilowatt-hour rating for a 4,500 BTU heater?

KEYSTROKE

 

DISPLAY

0.


(cont’d)


1/17/2017 2:30:48 PM

(cont’d)

KEYSTROKE

1. Enter BTU rating:

   

2. Find equivalent kilowatt hours:

  (Btu ► Kw-hr)

DISPLAY

4,500.

KW-H 1.3176

PARALLEL RESISTANCE

Find the equivalent Resistance for 10 Ohm, 20 Ohm, and 50 Ohm resistors placed in parallel.

KEYSTROKE

 

DISPLAY

0.

1. Enter first Resistor:

    (Par Res) P-RS 10.

2. Enter second Resistor:

    (Par Res) P-RS 6.6666667

3. Enter third Resistor:

    (Par Res) P-RS 5.8823529

Note: The total is recalculated with each additional Resistor value entered.



APPENDIX A — DEFAULT SETTINGS

After a Clear All (   ), your calculator will return to the following settings:

STORED VALUES

Insulation Rating

Wire Type Rating

Phase

DEFAULT VALUE

60º C

Copper

3Ø

30º C (86º F) Ambient Temperature

Volts

Voltage Drop %

Power Factor %

Efficiency %

Motor Type

240V

3%

100%

100%

Induction

Conduit Type

Fuse/Breaker Motor Type

EMT

Squirrel Cage non Design E

Overload FLC% 115%

Free Air Mode* Off

* This setting will also return to its default upon turning the calculator off and back on.

If you replace your batteries or perform a Full Reset* (Press



, hold down



and press



) your calculator will return to the following settings (in addition to those listed above):

PREFERENCE SETTINGS DEFAULT VALUE

NEC Code

Ambient Tempurature Units

Length Units

2017

°C

FEET

* Depressing the Reset button located below the perform a Full Reset.

 key will also



APPENDIX B – PREFERENCE SETTINGS

The ElectriCalc Pro has Preference Settings that allow you to set calculator modes. If you replace your batteries or perform a Full

Reset* (press  , hold down  , and press  ), your calculator will return to the following settings (in addition to those listed on the previous page), with the default setting for each preference listed first:

* Depressing the Reset button located below the form a Full Reset.

 key will also per-

PREFERENCE OPTIONS

1) NEC Code – 2017: Sets the calculator to 2017 NEC

Code Year

– 2014: Sets the calculator to 2014 NEC

Code Year


Code Year


Code Year


Code Year


Code Year


Code Year


Code Year

2) Ambient

Temperature

Units

– °C: Ambient Temperature is stored and displayed as °C.

– °F: Ambient Temperature is stored and displayed as °F.



3) Length Units – FEET: Length values stored or calculated using the  key are displayed as Feet.

– METERS: Length values stored or calculated using the  key are displayed as Meters.

APPENDIX C — 2017 NEC REFERENCES

Table 250.66

Table 250.122

Table 310.15(B)(2)(a)

Table 310.15(B)(3)(a)

Table 310.15(B)(16)

Table 310.15(B)(17)

Chapter 9, Tables 1, 4, 5 and 8

Table 430.247

Table 430.248

Table 430.250

Table 430.52

Appendix C

National Electrical Code ® and NEC ® are registered trademarks of the National Fire Protection Association, Inc.,

Quincy, MA 02269.

All listed table references are based on NEC 2017. Previous code years may have different table references.

APPENDIX D — CARE INSTRUCTIONS

Please follow the guidelines listed in this section for proper care and operation of your calculator. Not following the instructions listed below may result in damage not covered by your warranty. Refer to the Warranty section on page 61 for more details.

Do not expose calculator to temperatures outside the operating temperature range of 32ºF – 104ºF (0ºC – 40ºC).

Do not expose calculator to high moisture such as submersion in water, heavy rain, etc.



APPENDIX E — ACCURACY/ERRORS, AUTO

SHUT-OFF, BATTERIES, RESET

ACCURACY/ERRORS

Accuracy/Display Capacity — Your calculator has an eight-digit display. You may enter or calculate values up to 99,999,999. Each calculation is carried out internally to 12 digits.

Errors — When an incorrect entry is made, or the answer is beyond the range of the calculator, an error message will display. To clear an error condition, press the



button once. At this point, you can determine what caused the error and re-key the problem.

Error Codes

DISPLAY

OFLO

ENT Error

ERROR TYPE

Overflow; answer too large to display

Invalid entry

POWR Error nonE

HP Error

FULL Error

EROM Error

MATH Error

Power Factor (PF) or Efficiency (EFF) calculated above 100%

Conduit Size beyond limits of table

Unable to calculate Voltage Drop Wire Size

(Amps/Length too high)

Temperature setting out of range for

Wire calculation

Invalid Horsepower entry per NEC table

Entered or calculated more than 10 different

Wire Sizes

Bad EPROM

Math error (i.e., divide by zero)



AUTO SHUT-OFF

Your calculator is designed to shut itself off after about 8-12 minutes of non-use.

BATTERY

The ElectriCalc Pro uses one CR2016 battery. Should your calculator display become dim or erratic, replace the battery.

NOTE: Please use caution when disposing of your old battery as it contains hazardous chemicals.

Replacement batteries are available at most discount or electronics stores. You may also call Calculated Industries at

1-775-885-4900 or go to www.calculated.com.

Battery Replacement Instructions

While the calculator is off, turn the calculator over and use a

#1 Phillips screwdriver to remove the battery holder screw located near the center at the top. With the screw removed, pull battery holder out, remove old battery, and slide new battery into holder.

The negative side of the battery should be facing you as you insert the battery holder into the calculator. Replace screw using a

#1 Phillips screwdriver.

RESET

If your calculator should ever “lock up,” press Reset — a small hole located below the



key — to perform a total reset.



1/17/2017 2:30:49 PM

REPAIR AND RETURN

RETURN GUIDELINES

1. Please read the Warranty in this User’s Guide to determine if your Calculated Industries product remains under warranty before calling or returning any device for evaluation or repairs.

2. If your product won’t turn on, check the battery as outlined in the User’s Guide.

3. If you need more assistance, please go to the website listed below.

4. If you believe you need to return your product, please call a

Calculated Industries representative between the hours of

7 a.m. to 4 p.m. Pacific Time for additional information and a

Return Merchandise Authorization (RMA).

Call Toll Free: 1-800-854-8075

Outside USA: 775-885-4900 www.calculated.com/warranty



WARRANTY

Warranty Repair Service – U.S.A.

Calculated Industries (“CI”) warrants this product against defects in materials and workmanship for a period of one (1) year from the date of original consumer purchase in the U.S. If a defect exists during the warranty period, CI at its option will either repair (using new or remanufactured parts) or replace (with a new or remanufactured calculator) the product at no charge.

THE WARRANTY WILL NOT APPLY TO THE PRODUCT IF IT

HAS BEEN DAMAGED BY MISUSE, ALTERATION, ACCIDENT,

IMPROPER HANDLING OR OPERATION, OR IF

UNAUTHORIZED REPAIRS ARE ATTEMPTED OR MADE. SOME

EXAMPLES OF DAMAGES NOT COVERED BY WARRANTY

INCLUDE, BUT ARE NOT LIMITED TO, BATTERY LEAKAGE,

BENDING, A BLACK “INK SPOT” OR VISIBLE CRACKING OF

THE LCD, WHICH ARE PRESUMED TO BE DAMAGES

RESULTING FROM MISUSE OR ABUSE.

To obtain warranty service in the U.S., please go to the website.

A repaired or replacement product assumes the remaining warranty of the original product or 90 days, whichever is longer.

Non-Warranty Repair Service – U.S.A.

Non-warranty repair covers service beyond the warranty period, or service requested due to damage resulting from misuse or abuse.

Contact Calculated Industries at the number listed above to obtain current product repair information and charges. Repairs are guaranteed for 90 days.

Repair Service – Outside the U.S.A.

To obtain warranty or non-warranty repair service for goods purchased outside the U.S., contact the dealer through which you initially purchased the product. If you cannot reasonably have the product repaired in your area, you may contact CI to obtain current product repair information and charges, including freight and duties.



Disclaimer

CI MAKES NO WARRANTY OR REPRESENTATION, EITHER

EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT’S

QUALITY, PERFORMANCE, MERCHANTABILITY, OR FITNESS

FOR A PARTICULAR PURPOSE. AS A RESULT, THIS PRODUCT,

INCLUDING BUT NOT LIMITED TO, KEYSTROKE PROCEDURES,

MATHEMATICAL ACCURACY AND PREPROGRAMMED

MATERIAL, IS SOLD “AS IS,” AND YOU THE PURCHASER

ASSUME THE ENTIRE RISK AS TO ITS QUALITY AND

PERFORMANCE.

IN NO EVENT WILL CI BE LIABLE FOR DIRECT, INDIRECT,

SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES

RESULTING FROM ANY DEFECT IN THE PRODUCT OR ITS

DOCUMENTATION.

The warranty, disclaimer, and remedies set forth above are exclusive and replace all others, oral or written, expressed or implied. No CI dealer, agent, or employee is authorized to make any modification, extension, or addition to this warranty.

Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific rights, and you may also have other rights, which vary from state to state.

FCC Class B

This equipment has been certified to comply with the limits for a

Class B calculating device, pursuant to Subpart J of Part 15 of

FCC rules.



Legal Notes

Software copyrighted and licensed by Calculated Industries, Inc., 2017.

User’s Guide copyrighted by Calculated Industries, Inc., 2017.

ElectriCalc ® Pro is a trademark and Calculated Industries ® is a registered trademark of Calculated Industries, Inc. © 2017.

ALL RIGHTS RESERVED

Designed in the U.S.A.



1/17/2017 2:30:49 PM

Looking for New Ideas

Calculated Industries, a leading manufacturer of special-function calculators and digital measuring instruments, is always looking for new product ideas in these areas.

If you have a new product idea, please visit our “Bright Idea” page at www.calculated.com/brightidea.asp. For suggestions about improving this product or other products, please visit us at www.calculated.com under “Contact Us”. Thank You.

4840 Hytech Drive

Carson City, NV 89706 U.S.A.

1-800-854-8075 • Fax: 1-775-885-4949

E-mail: [email protected]

www.calculated.com



CMY

K

MY

CY

Y

CM

C

M

Calculated Industries 5070 ElectriCalc Pro User Guide 66 Pages

Calculated Industries 5070 ElectriCalc Pro User Guide

TABLE OF CONTENTS

ELECTRICALC

PRO

GETTING STARTED

USING THE ELECTRICALC PRO

(1Ø)

(3Ø)

(1Ø)

(3Ø)

(3Ø)

(PF%)

IMPORTANT NOTE ON VOLTAGE

DROP CALCULATIONS

APPENDIX A — DEFAULT SETTINGS

APPENDIX B – PREFERENCE SETTINGS

APPENDIX C — 2017 NEC REFERENCES

APPENDIX D — CARE INSTRUCTIONS

APPENDIX E — ACCURACY/ERRORS, AUTO

SHUT-OFF, BATTERIES, RESET

REPAIR AND RETURN

WARRANTY

Related manuals

Table of contents

Calculated Industries 5070 ElectriCalc Pro User Guide 66 Pages

Calculated Industries 5070 ElectriCalc Pro User Guide

TABLE OF CONTENTS

ELECTRICALC

PRO

GETTING STARTED

USING THE ELECTRICALC PRO

(1Ø)

(3Ø)

(1Ø)

(3Ø)

(3Ø)

(PF%)

IMPORTANT NOTE ON VOLTAGE

DROP CALCULATIONS

APPENDIX A — DEFAULT SETTINGS

APPENDIX B – PREFERENCE SETTINGS

APPENDIX C — 2017 NEC REFERENCES

APPENDIX D — CARE INSTRUCTIONS

APPENDIX E — ACCURACY/ERRORS, AUTO

SHUT-OFF, BATTERIES, RESET

REPAIR AND RETURN

WARRANTY

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Table of contents