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50 — ElectriCalc Pro

What overload protection device size is
required for a 460 Volt, 3-phase, 15 HP
induction motor with a nameplate current
rating of 19.2 Amps and a 1.0 service fac-
tor? What is the required overload rating
at 125% (for a 1.15 service factor)?

Steps

Keystrokes

Display

Clear calculator

o o

Set to 3-phase

S 3

3 PH

Enter Volts

4 6 0 U

VOLT 460.

Enter Horsepower

1 5 h

IND 15. HP

Enter nameplate

current

1 9 • 2 A

AMPS 19.2

Find overload size

AMPS 22.08 ol

Display % used

%FLC 115.

Find 125% load

1 2 5 L

AMPS 24. ol

Display % used

%FLC 125.

Reset overload

rating and clear

1 1 5 L o

Overload Protection Size

Содержание 5065

Страница 1: ...ELECTRICALC PRO NEC COMPLIANT UPDATEABLE ELECTRICAL CODE CALCULATOR Model 5065 User s Guide...

Страница 2: ...1999 1996 and future National Electrical Codes allowing you to solve Code relat ed problems quickly and accurately The most common NEC tables are now at your fingertips An important feature of the Ele...

Страница 3: ...istance Copper or Aluminum Wire Sizes Parallel and Derated Wire Sizes Voltage Drop Wire Sizes and Actual Voltage Drops Voltage Drop Distances and Wire Resis tances Kilowatt hours and BTU s Parallel Re...

Страница 4: ...Sizing 34 Voltage Drop 41 Ground Conductor Wire Size 47 Equipment Grounding Conductor Wire Size 48 Fuse and Circuit Breaker Size 49 Starter Size 49 Overload Protection Size 50 Conduit Size 51 Converti...

Страница 5: ...tains the new Code 2 Once you receive the NEC Update chip you need to install it in your ElectriCalc Pro a Turn calculator off b As a precaution remove the bat tery located back of calculator top of u...

Страница 6: ...rithmetic operation keys 0 1 2 3 4 5 6 7 8 9 Used for keying in numbers Percent Four function x Percent key S v Reciprocal 1 x Finds the reciprocal of a number e g 8 S v 0 125 B Back Space Function Us...

Страница 7: ...ayed value S B Square Root Square Root function s 0 Cumulative Memory M Adds displayed value to Memory e g 1 0 s 0 2 0 s 0 r 0 30 To subtract from Memory you must add a negative value to the cumulativ...

Страница 8: ...e to set default settings or modes see Preference Settings S 1 Single Phase 1 Sets calculator to single phase mode Displays 1 S 3 Three Phase 3 Sets calculator to three phase mode This is the default...

Страница 9: ...ong wire type pressing S 4 will change the material type without changing the size Displays Al or Cu S 5 Free Air FrAir Sets calculator into Free Air mode which refers to NEC Table 310 17 for wire siz...

Страница 10: ...sing Volts and VA or Watts Displays AMPS KAMP or mAMP U Volts Enters or calculates Volts using Amps HPth and VA or Watts Default value is 240 Volts Displays VOLT KV or mV V Volt Amps Enters or calcula...

Страница 11: ...n 100 will result in an error Displays PF H Horsepower Theoretical Enters or calculates theoretical Horse power based on Amps VA Watts efficiency PF and or Volts 1 0 HPth correlates to 746 Watts at 10...

Страница 12: ...sepower 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 4...

Страница 13: ...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...

Страница 14: ...tion Displays NEC 310 16 S w 125 Ampacity 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 cal...

Страница 15: ...e 310 15 b 2 a Derated wire sizes are not calculated when there are less than four wires or when the unit is in Free Air mode First Press Calculates the derated wire size if you have entered the numbe...

Страница 16: ...material etc v 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...

Страница 17: ...EC Table 250 66 and an entered or calculated service entrance conductor largest size Only actual wire sizes are con sidered valid entries First Press Calculates the copper grounding elec trode conduct...

Страница 18: ...ng for a over current device up line e g 300 S G 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 Displa...

Страница 19: ...Full Load Current multipliers listed in NEC Table 430 52 You can also calculate the full Voltage starter size for non plugging and non jogging duty motors based on phase Voltage motor HP and NEMA tab...

Страница 20: ...se First Press Calculates the minimum Amp rating for a Dual Element Fuse Displays AMPS dE Second Press Displays the full load current percent multiplier used to determine fuse size Displays FLC S D Si...

Страница 21: ...C I Inverse Time Breaker First Press Calculates the minimum Amp rating for an Inverse Time Breaker based on the phase motor type and amperage Displays AMPS b2 Second Press Displays the full load curre...

Страница 22: ...rcent multiplier value used to determine the overload current protection size Sub sequent presses of L repeat the cycle Displays FLC S h Starter Size Starter Displays the starter size from NEMA public...

Страница 23: ...3 3 1 2 4 5 and 6 Conduit sizes are entered using decimal equiva lents e g 1 1 2 is entered as 1 5 3 4 is entered as 75 etc Number of Wires Used to enter or calculate the number of wires in a raceway...

Страница 24: ...not been en tered or calculated or an invalid con duit size is entered the calculator will display nonE Second Press Shows total number of wires in the conduit for calculated conduit size Shows the c...

Страница 25: ...ys the currently selected conduit type Second Press Subsequent presses will display and select the next conduit type from this list 1 EMT 2 ENT 3 FMC 4 IMC 5 LFNB 6 LFNA 7 LFMC 8 RMC 9 P 80 10 P 40 11...

Страница 26: ...dividual selections note the will advance the will back up You can change these settings at any time by repeating the above and setting in a new preference NOTE To return the Preferences to the defaul...

Страница 27: ...ve your calculator it is pre set to the default settings listed below You can always return your calculator to these default values by performing a Clear All S x Ambient Temperature 30 C Insulation Ra...

Страница 28: ...sign A 3 2 5 B 3 2 1 C 3 x 2 6 D 3 2 1 5 The Percent key can be used for find ing a given percentage of a number or for working add on discount or division percentage calculations 3 5 5 x 1 5 53 25 2...

Страница 29: ...Memory r r Clear Memory S r Memory is semi permanent clearing only when you 1 turn off the calculator 2 press r r 3 press S r 4 press S x Clear All When Memory is recalled r 0 consecutive presses of...

Страница 30: ...example shows the use of M1 s 1 To use M2 through M9 replace the presses of the 1 key with presses of the corresponding number key 2 through 9 You can replace a value in one of these Memory registers...

Страница 31: ...5 Amps Steps Keystrokes Display Clear calculator o o 0 Set to 1 phase S 1 1 PH Enter VA 1 4 6 0 5 V VA 14 605 Enter Amps 1 1 5 A AMPS 115 Solve for Volts U VOLT 127 Finding Amps What is the current Am...

Страница 32: ...s Display Clear calculator o o 0 Set to 1 phase S 1 1 PH Add VA loads 7 8 0 0 1 5 1 0 0 5 1 0 0 8 9 0 0 6 4 7 0 43 370 Enter as VA V VA 43 370 Enter Volts 2 4 0 U VOLT 240 Solve for Amps A AMPS 180 70...

Страница 33: ...s the kVA rating for a 120 208 Volt three phase 65 Amp transformer Steps Keystrokes Display Clear calculator o o 0 Set to 3 phase S 3 3 PH Enter Volts 2 0 8 U VOLT 208 Enter Amps 6 5 A AMPS 65 Solve f...

Страница 34: ...PS 90 Enter Volts 2 0 8 U VOLT 208 Solve for kW K W KW 32 423991 The ElectriCalc Pro s built in Ohm s Law functions allow you to easily solve for Voltage Volts current Amps or resist ance Ohms by ente...

Страница 35: ...l resistor is plugged into a 12 volt circuit Find the current inAmps Steps Keystrokes Display Clear calculator o o 0 Enter resistance 1 2 0 K S V KOHM 120 Enter Voltage 1 2 S U Vdc 12 V Find current S...

Страница 36: ...tion 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 4...

Страница 37: ...ind 125 A size S w AWG 14 CU WIRE SIZE 125 Find max ampacity w 14 20 0 WIRE A125 Display will show wire size in the upper left when displaying wire ampacity rating Finding Synchronous Motor Horsepower...

Страница 38: ...nt motor is defined as having a 10 Amp load on a 180 Volt circuit What is its horsepower Steps Keystrokes Display Clear calculator o o 0 Set to DC motor S 8 S 8 DC 0 Enter Volts 1 8 0 U VOLT 180 Enter...

Страница 39: ...ments defined in NEC Tables 310 16 and 310 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...

Страница 40: ...260 A AMPS 260 Find wire size w AWG 300 CU WIRE SIZE Change to 90 S 9 AWG 0000 CU WIRE SIZE Reset to 60 S 6 o 3 60 Cu 0 and Clear Wire Sizing Based on Ambient Temperature Find the 90 C copper wire siz...

Страница 41: ...ambient temperature 2 0 S 2 AMB 20 C Find adjusted wire size w AWG 00 CU Amb WIRE SIZE Display Wire w 00 202 8 Ampacity Amb WIRE A Display CMIL w CMIL 133 100 WIRE Display NEC Table w NEC 310 16 Reset...

Страница 42: ...to 3 phase S 3 3 PH Set to 75 C S 7 3 75 Cu 3 PH Enter Amps 2 6 5 A AMPS 265 Find wire size w AWG 300 CU WIRE SIZE Change to alum S 4 AWG 400 AL WIRE SIZE Display Wire w 400 270 0 Ampacity AI WIRE A...

Страница 43: ...culator o o 0 Set to 60 C S 6 3 60 Cu 0 Set free air mode S 5 3 60 FrAir Cu 0 Enter Amps 5 0 0 A AMPS 500 Find 1 wire size w AWG 500 CU FrAir WIRE SIZE Find 2 wire size 2 P PAR 000 CU FrAir WIRE SIZE...

Страница 44: ...ear calculator o o 0 Set to 75 C S 7 3 75 Cu 0 Enter Amps 6 5 A AMPS 65 Find normal wire size w AWG 6 CU WIRE SIZE Find derated wire size 9 S P D R 3 CU WIRE SIZE Display Wire P D R 45 5 Ampacity WIRE...

Страница 45: ...Cu 0 Enter Volt amps 4 7 6 5 0 V VA 47 650 Enter Volts 2 4 0 U VOLT 240 Set to 50 C amb 5 0 S 2 AMB 50 C Find adj wire size w AWG 250 CU Amb WIRE SIZE Find derated 8 S P D R 500 CU wire size Amb WIRE...

Страница 46: ...he phase Volts Amps Length wire type and allowable VD percentage It will solve for the distance l once you have entered or calculated the phase Volts Amps wire type Voltage drop wire size and allow ab...

Страница 47: ...city 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 1 system Wha...

Страница 48: ...rop on this branch circuit Steps Keystrokes Display Clear calculator o o 0 Set to 75 C S 7 3 75 Cu 0 Set to 3 phase S 3 3 75 Cu 3 PH Enter Amps 2 0 A AMPS 20 Enter Volts 2 3 0 U VOLT 230 Enter Length...

Страница 49: ...branch circuit Steps Keystrokes Display Clear calculator o o 0 Set to 75 C S 7 3 75 Cu 0 Enter Amps 2 0 A AMPS 20 Enter Volts 2 0 8 U VOLT 208 Enter distance 1 7 5 l FEET 175 Enter allow VD 3 v DROP...

Страница 50: ...240 Enter wire size 1 0 w AWG 10 Cu WIRE SIZE Enter 3 VD 3 v DROP 3 0 V Find distance l FEET 234 86987 Find actual Voltage drop v DROP 7 2 V Find v drop v DROP 3 0 V Wire size can also be entered in...

Страница 51: ...be entered in Circular Mils e g 6 6 3 6 0 w enters 66 360 CMILs and displays 2 AWG wire size Given resistance per 1000 Feet divide by 1000 to get a per Foot resist ance then multiply by 85 NOTE See S...

Страница 52: ...phase 75 C copper service entrance conductor being used What is the equivalent aluminum size What is the equivalent Circular Mils Steps Keystrokes Display Clear calculator o o 0 Set to 3 phase S 3 3...

Страница 53: ...uipment grounding conduc tor size required when the circuit breaker is rated at 45 Amps and 90 copper is being used in the installation What is the equivalent aluminum size Steps Keystrokes Display Cl...

Страница 54: ...current A FLC 130 A Find DE fuse size D AMPS 227 5 dE Display used D FLC 175 Find SE fuse size S D AMPS 390 SE Display used D FLC 300 Find inv time brkr I AMPS 325 b2 Display used I FLC 250 Find ins t...

Страница 55: ...verload rating at 125 for a 1 15 service factor Steps Keystrokes Display Clear calculator o o 0 Set to 3 phase S 3 3 PH Enter Volts 4 6 0 U VOLT 460 Enter Horsepower 1 5 h IND 15 HP Enter nameplate cu...

Страница 56: ...NEC Chapter 9 Tables 1 3 4 and 5 the calculator can calculate a conduit size based on the con duit type and the same or different wire types and sizes To select a specific conduit type enter the corre...

Страница 57: ...H Set to 60 C S 6 1 60 Cu 1 PH Enter Volts 1 1 5 U VOLT 115 Enter Horsepower 1 0 h IND 10 HP Enter cond type 8 S C RMC nonE COND Display full load Amps A FLC 100 A Find wire size S w AWG 0 CU WIRE SIZ...

Страница 58: ...Permanent Values settings Changing these settings may affect your calculations Finding Conduit Sizes for Multiple Conductors Same Wire Type and Size Find the minimum IMC conduit size for eleven 6 THH...

Страница 59: ...wires How many THW wires Steps Keystrokes Display Clear calculator o o 0 Enter cond type 1 S C EMT nonE COND Enter wire size 1 0 w AWG 10 CU WIRE SIZE Enter conduit size 3 C EMT 3 00 in COND SIZE Fin...

Страница 60: ...ea Note The cross sectional areas are the same for both THHN and THWN display will show as THHN Steps Keystrokes Display Clear calculator o o 0 Set to 75 S 7 3 Cu 75 0 Enter cond type 3 S C FMC nonE C...

Страница 61: ...lar Mils e g 1 0 5 6 0 0 w enters 105 600 CMILs and displays 0 AWG wire size 6 6 3 6 0 w enters 66 360 CMILs and displays 2 AWG wire size NOTE See Settings for a list of Permanent Values settings Chan...

Страница 62: ...176 Kilowatt Hours Find the equivalent resistane for 10 Ohm 20 Ohm and 50 Ohm resistors placed in parallel Steps Keystrokes Display Clear calculator o o 0 Enter 1st Resistor 1 0 S s P RS 10 Enter 2nd...

Страница 63: ...Temperature setting out of range for wire calculation HP Error Invalid HP entry per NEC table FULL Error Entered or calculated more than 15 different wires sizes EROM Error Bad EROM MATH Error Math e...

Страница 64: ...calculator with positive side of battery facing back of calculator Table 250 66 Table 250 122 Table 310 15 b 2 a Table 310 16 Table 310 17 Chapter 9 Table 1 4 5 and 8 Section 430 32 Table 430 148 Tab...

Страница 65: ...resets calculator to default settings or 2 by changing each one or all of these settings The following are permanent values 1 Selectable 60 C 75 C 90 C insulation ratings and CU AL wire type ratings...

Страница 66: ...rn 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 In...

Страница 67: ...at no charge THE WARRANTY WILL NOT APPLY TO THE PRODUCT IF IT HAS BEEN DAMAGED BY MISUSE ALTERATION ACCIDENT IMPROP ER HANDLING OR OPERATION OR IF UNAUTHORIZED REPAIRS ARE ATTEMPTED OR MADE SOME EXAM...

Страница 68: ...tain current product repair information and charges Repairs are guaranteed for 90 days Repair Service Outside U S A To obtain warranty or non warranty repair service for goods purchased outside the U...

Страница 69: ...DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAM AGES RESULTING FROM ANY DEFECT IN THE PRODUCT OR ITS DOCUMENTATION The warranty disclaimer and remedies set forth above are exclusive and repla...

Страница 70: ...Industries by Specialty Calculator Technologies LLC 2008 User s Guide copyrighted by Calculated Industries Inc 2008 ElectriCalc and Calculated Industries are registered trademarks of Calculated Indus...

Страница 71: ......

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