Calculated Industries ElectriCalc Pro Pocket Reference Manual Download Page 21 | Manualshive

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P

ocket

R

efeRence

G

uide

— 21

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 using NEC Tables

430.247, 430.248 and 430.250.

Finding Full-Load Current

A 2 HP Induction motor operates on

230 Volt, Single-Phase power. What is

the Full-Load Current for this motor?

KEYSTROKE

DISPLAY

 

0.

1. Set to 1-Phase:

 

(1Ø)

1 Ø

1 Ph

2. Enter Volts:

   

VOLT 230.

3. Enter HP:

 

IND* 2. hP

* 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

Find the Wire Size required to connect

a continuous run, 3Ø, 10 HP Induction

motor into a 230V circuit.

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Summary of Contents for ElectriCalc Pro

Page 1: ......

Page 2: ...through 2014 and future National Electrical Codes The most common NEC tables are now at your fingertips The ElectriCalc Pro instantly solves for Volts Amps Volt Amps Watts PF and EFF Cu and Al Wire Si...

Page 3: ...NCE SETTINGS 13 BASIC MATH OPERATIONS 14 PERCENT CALCULATIONS 14 MEMORY OPERATIONS 14 Using M 15 Using Memory Storage Keys M1 M9 15 using the electricalc pro 15 KIRCHHOFF S LAW 15 Finding Voltage 16 F...

Page 4: ...UIPMENT GROUNDING COUNDUCTOR WIRE SIZE 29 FUSE AND CIRCUIT BREAKER SIZE 30 STARTER SIZE 31 OVERLOAD PROTECTION SIZE 31 CONDUIT SIZE 32 Finding Motor Branch Circuit Wire Size and Conduit Size Same Wire...

Page 5: ...alues Off Turns all power off Arithmetic operation keys and Keys used for entering numbers Second Function Used to access secondary functions Store Stores values Storage Registers Store values in Memo...

Page 6: ...rcentage Standard function x2 Squares the value on the display Backspace Function Used to delete entries one keystroke at a time Calculates the Square Root of the displayed value 1 x Finds the Recipro...

Page 7: ...Amb Enters ambient temperature for finding Wire Sizes Copper Aluminum Cu Al Toggles between Copper and Aluminum Wire Free Air FrAir Sets calculator to Free Air mode 60 C Wire Insulation Sets to 60 C W...

Page 8: ...Volt Amps Watts Enters or calculates Watts DC Amps Idc Enters or calculates DC Amps DC Volts Vdc Enters or calculates DC Volts DC Resistance R Enters or calculates DC Resistance in Ohms Power Factor...

Page 9: ...rallel Resistors Motor Keys Ind Sync DC Toggles between Motor Types Motor Horsepower Enters or calculates Motor Horsepower Starter Size Starter Displays the Starter Size Wire Sizing Keys Wire Size Amp...

Page 10: ...ng Parallel Conductors A second press displays the Ampacity Derated Wire Size D R Size Calculates Derated Wire Sizes given a number of wires in the raceway Also shows Adjusted Ampacity Deration Factor...

Page 11: ...ire Circular Mils and NEC reference with additional key presses Equipment Ground EqGrnd Provides the Copper Equipment Ground size given an entered Wire Size Additional key presses show Aluminum Ground...

Page 12: ...es Dual Element Fuse Single Element Fuse SEFuse Inverse Time Breaker Instantaneous Trip Circuit Breaker InsTrip Displays the minimum Amp rating and percent multipier Conduit Sizing Keys Number of Wire...

Page 13: ...Total Wire Area and remaining Wire Area when Conduit Size is calculated Conduit Type Cond Type Defines Conduit Type by entering the number correlating to the Types shown below Repeated presses of als...

Page 14: ...or keys to toggle between options Press any other key to exit Preferences KEYSTROKE DISPLAY Prefs NEC Code NEC 2014 NEC 1996 NEC 1999 NEC 2002 NEC 2005 NEC 2008 NEC 2011 repeats options NEC 2014 Secon...

Page 15: ...1 5 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 MEMO...

Page 16: ...M 255 2 Recall Total TTL 100 AVG 50 CNT 2 3 Display Clear Memory 100 Using Memory Storage Keys M1 M9 KEYSTROKE DISPLAY M 1 175 0 M 1 175 using the electricalc pro KIRCHHOFF S LAW The ElectriCalc Pro c...

Page 17: ...0 1 Set to 1 Phase 1 1 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 for a load drawing 8 250 VA on a 240V 3 circuit KEYSTROKE DISPLAY 0...

Page 18: ...KEYSTROKE DISPLAY 0 1 Set to 1 Phase 1 1 1 PH 2 Enter Volts VOLT 120 3 Enter Amps AMPS 22 4 Solve for Volt Amps VA 2 640 Finding kW Rating What s the kW rating for a 90 Amp 208V 3 boiler with 100 Powe...

Page 19: ...esistance Finding Volts The Current in a circuit is 0 0125 Amps and the total Resistance is 480 Ohms Find the Voltage KEYSTROKE DISPLAY 0 1 Enter Current Idc Idc 0 0125 A 2 Enter Resistance R OHMS 480...

Page 20: ...ge Vdc Vdc 12 V 3 Find Current Idc Idc 0 0001 A Finding Resistance Ohms An electrical circuit operating at 240 Volts has a Current of 14 6 Amperes Find the total Resistance KEYSTROKE DISPLAY 0 1 Enter...

Page 21: ...rent A 2 HP Induction motor operates on 230 Volt Single Phase power What is the Full Load Current for this motor KEYSTROKE DISPLAY 0 1 Set to 1 Phase 1 1 1 PH 2 Enter Volts VOLT 230 3 Enter HP IND 2 H...

Page 22: ...IND 10 HP Press until IND is displayed in the upper left area of the display 6 Find Full Load Current FLC 28 A 7 Find 125 Ampacity Wire Size 125 AWG 8 CU WIRE SIZE 125 AMPACITY WIRE SIZING Wire Sizin...

Page 23: ...PH 4 Enter kVA KVA 30 5 Enter Volts VOLT 240 6 Find Amps AMPS 125 7 Find Wire Size AWG 0 CU WIRE SIZE Wire Sizing Based on Material Type Find the Wire Size for a 75 C Copper Wire carrying a 3 load of...

Page 24: ...ductors Free Air 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 conductor...

Page 25: ...650 VA load to a 240 Volt 3 source Ambient Temperature is 50 C What is the Derated Wire Size required if eight current carrying THHN wires are installed in the raceway KEYSTROKE DISPLAY 0 1 Set to 3...

Page 26: ...iCalc Pro uses Resistance values found in NEC Table 8 Chapter 9 to determine Voltage Drop Wire Lengths or Wire Sizes given a maximum Voltage Drop percentage Finding Voltage Drop You are installing 175...

Page 27: ...lve Voltage Drop DROP 3 0 V 9 Solve percent Voltage Drop DROP 1 4 V Finding Voltage Drop Wire Size A 20 Amp 3 208 Volt load will be located 175 Feet away from the source Assuming a 3 allowable Voltage...

Page 28: ...able VD DROP 3 0 V 8 Find Wire Size AWG 8 CU VD WIRE SIZE 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 con...

Page 29: ...DROP 3 0 V 8 Find distance FEET 234 86987 Finding Voltage Drop Resistance What is the Resistance per 1 000 Ft of 2 90 C Copper conductor KEYSTROKE DISPLAY 0 1 Set to 90 C 90 90 0 2 Set to Copper if ne...

Page 30: ...a 2 0 Copper service entrance conductor is being used KEYSTROKE DISPLAY 0 1 Enter Wire Size and find Ground Wire Size 00 GRND 4 CU WIRE SIZE 2 Find Aluminum size GRND 2 AL WIRE SIZE EQUIPMENT GROUNDI...

Page 31: ...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 Dual Element Fuse size for a 230 Volt...

Page 32: ...1 Set to 3 phase 3 3 3 PH 2 Enter Volts VOLT 575 3 Enter HP IND 20 HP Press until IND is displayed in the upper left area of the display 4 Solve for Starter Size Starter STAR SIZE 2 OVERLOAD PROTECTI...

Page 33: ...Overload rating and Clear 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 To sele...

Page 34: ...motor to a 115 Volt source KEYSTROKE DISPLAY 0 1 Set to 1 Phase 1 1 1 PH 2 Set to 60 C 60 1 60 1 PH 3 Set to Copper if necessary Cu Al 1 60 Cu 1 PH 4 Enter Volts VOLT 115 5 Enter Horsepower IND 10 HP...

Page 35: ...TL WIRE AREA 13 Find Remaining Area REM 0 1021 WIRE AREA Finding Conduit Size Multiple Conductors Different Wire Sizes and Types Three 1 0 THWN conductors and one 2 XHHW conductor are to connect to a...

Page 36: ...0 in COND SIZE 7 Find total number of Wires 4 TTL WIRES 8 Find Conduit Fill Percent FILL 36 1 COND 9 Find actual Fill Area FILL 0 6711 TTL WIRE AREA 10 Find Remaining Area REM 0 0717 WIRE AREA CONVERT...

Page 37: ...r 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 Res...

Page 38: ...0V Voltage Drop 3 Power Factor 100 Efficiency 100 Motor Type Induction Conduit Type EMT Fuse Breaker Motor Type Squirrel Cage non Design E Overload FLC 115 Free Air Mode Off This setting will also ret...

Page 39: ...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...

Page 40: ...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 A...

Page 41: ...d EPROM MATH Error 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 Sh...

Page 42: ...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 hol...

Page 43: ...t 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 Cal...

Page 44: ...ighted by Calculated Industries Inc 2014 ElectriCalc Pro is a trademark and Calculated Industries is a registered trademark of Calculated Industries Inc 2014 4840 Hytech Drive Carson City NV 89706 U S...

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