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lectri

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finding amps

What is the current (Amps) for a load drawing 8,250 Volt-Amps

on a 240 Volt, Three-Phase circuit?

KeysTRoKe

DIsPlay

 

1. Set to 3-Phase:

 

(3Ø)

3Ø

3 Ph

2. Enter VA:

    

Va 8,250.

3. Enter Volts:

   

VolT 240.

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

 

1. Set to 1-Phase:

 

(1Ø)

1 Ø

1 Ph

2. Add VA loads:

    

7,800.

     

22,900.

    

28,000.

    

36,900.

    

43,370.

Содержание ElectriCalc Pro

Страница 1: ......

Страница 2: ...RY 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...

Страница 3: ...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 Siz...

Страница 4: ...nt 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 so...

Страница 5: ...rary values Off Turns all power off Clears all non permanent values Arithmetic operation keys and Keys used for entering numbers Second Function Used with other keys to access secondary functions Stor...

Страница 6: ...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 Chang...

Страница 7: ...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...

Страница 8: ...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 Res...

Страница 9: ...termine 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...

Страница 10: ...rcular 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 Amp...

Страница 11: ...lculations smaller than 1 0 will display nonE as the NEC does not allow Parallel Wire runs smaller than 1 0 First Press When preceded by a number calculates the applicable Wire Size for that quantity...

Страница 12: ...ons 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 ca...

Страница 13: ...tered 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...

Страница 14: ...d 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...

Страница 15: ...isplays the current Motor Type Note there is no Motor Type in Single Phase mode Second Press In Three Phase mode only subsequent presses of will select and display the next Motor Type from this list S...

Страница 16: ...ntaneous Trip Circuit Breaker based on the Phase Motor Type and Amperage Second Press Displays the Full Load Current percent multiplier value used to determine Breaker Size Conduit Sizing Keys The Ele...

Страница 17: ...total area of the entered Wire Types and Wire Sizes up to 15 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 W...

Страница 18: ...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...

Страница 19: ...lculator 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 2011 1996 1999 2002 2005 20...

Страница 20: ...ey 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...

Страница 21: ...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...

Страница 22: ...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 Volta...

Страница 23: ...0 3 Enter Volts VOLT 240 4 Solve for Amps AMPS 19 846416 Finding Current Load A building with 120 240 Volt 1 service has the following loads Range 7 800 VA Heating 15 100 VA Dryer 5 100 VA Appliances...

Страница 24: ...for a 75 kW load connected in a 120 208 Volt 3 circuit KEYSTROKE DISPLAY 0 1 Set to 3 Phase 3 3 PH 2 Enter kilowatts KW 75 3 Enter Volts VOLT 208 4 Solve for Amps AMPS 208 17918 Finding Volt Amps What...

Страница 25: ...t is the kVA rating for a 120 208 Volt Three Phase 65 Amp transformer KEYSTROKE DISPLAY 0 1 Set to 3 Phase 3 3 3 PH 2 Enter Volts VOLT 208 3 Enter Amps AMPS 65 4 Solve for kVA KVA 23 417327 Finding Wa...

Страница 26: ...AMPS 45 5 Solve for Watts WATT 4 698 Finding kW Rating What s the kW rating for a 90 Amp 208 Volt Three Phase boiler with 100 Power Factor KEYSTROKE DISPLAY 0 1 Set to 3 Phase 3 3 3 PH 2 Set Power Fa...

Страница 27: ...ons 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...

Страница 28: ...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...

Страница 29: ...LT 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 S...

Страница 30: ...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...

Страница 31: ...or 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 ca...

Страница 32: ...et 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 kVA KVA 30 5 Enter Volts VOLT 240 6 Find Amps AMPS 125 7 Find Wire Size AWG 0 CU WIRE SIZE 8 D...

Страница 33: ...C 75 3 75 3 PH 3 Set to Copper if necessary Cu Al 3 75 Cu 3 PH 4 Enter Amps AMPS 260 5 Find Wire Size AWG 300 CU WIRE SIZE 6 Change to 90 C 90 3 90 Cu AWG 0000 CU WIRE SIZE Wire Sizing Based on Ambien...

Страница 34: ...ize AWG 000 CU WIRE SIZE 8 Change Ambient temperature Amb 1 90 Cu Amb AMB 20 C 9 Find adjusted Wire Size AWG 00 CU WIRE SIZE 10 Display Wire Ampacity 210 6 WIRE A The Wire Size will be shown in the up...

Страница 35: ...PH 2 Set to 75 C 75 3 75 3 PH 3 Set to Copper if necessary Cu Al 3 75 Cu 3 PH 4 Enter Amps AMPS 265 5 Find Wire Size AWG 300 CU WIRE SIZE 6 Change to Aluminum Cu Al 3 75 Al AWG 400 AL WIRE SIZE 7 Dis...

Страница 36: ...conductors KEYSTROKE DISPLAY 0 1 Set to 60 C 60 60 0 2 Set to Copper if necessary Cu Al 60 Cu 0 3 Set to Free Air mode FrAir 60 Cu FrAir 0 4 Enter Amps AMPS 500 5 Find Wire Size for one conductor AWG...

Страница 37: ...G 6 CU WIRE SIZE 5 Find Derated Wire Size D R Size D R 3 CU WIRE SIZE 6 Display Wire Ampacity D R 45 5 WIRE A 7 Display Adjustment Factor ADJ 70 8 Display NEC Table NEC 310 15 b 3 Sizing Temperature A...

Страница 38: ...A 47 650 5 Enter Volts VOLT 240 6 Set to 50 C Ambient Temperature Amb 3 60 Cu Amb AMB 50 C 7 Find Adjusted Wire Size AWG 250 CU WIRE SIZE 8 Find Derated Wire Size D R Size D R 500 CU WIRE SIZE 9 Displ...

Страница 39: ...op 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...

Страница 40: ...WG 8 CU 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 Th...

Страница 41: ...7 Enter Wire Size 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 Fee...

Страница 42: ...ble VD DROP 3 0 V 8 Find Wire Size AWG 8 CU VD WIRE SIZE 9 Find actual Voltage Drop DROP 4 7 V 10 Find percent Voltage Drop DROP 2 3 V Finding Voltage Drop Distance How far from a Three Phase 240 Volt...

Страница 43: ...Voltage Drop DROP 3 0 V 8 Find distance FEET 234 86987 9 Find actual Voltage Drop DROP 7 2 V 10 Find percent Voltage Drop DROP 3 0 V Wire size can also be entered in Circular Mils e g enters 10 380 CM...

Страница 44: ...to Copper if necessary Cu Al 90 Cu 0 3 Enter Wire Size AWG 2 CU WIRE SIZE 4 Find Resistance Wire Res OHMS 0 2033993 WIRE 5 Find 85 foot Resistance 0 0172889 Wire size can also be entered in Circular...

Страница 45: ...ired 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 KEYSTROKE DISPLAY 0 1 Enter Wire Size a...

Страница 46: ...What is the equivalent Aluminum size KEYSTROKE DISPLAY 0 1 Find Equipment Ground Wire Size 45 EqGrnd EQPG 10 CU WIRE SIZE 2 Find Aluminum size EQPG 8 AL WIRE SIZE 3 Display NEC Table NEC 250 122 FUSE...

Страница 47: ...ad Current FLC 130 A 5 Find Dual Element Fuse size AMPS 227 5 dE 6 Display percent used FLC 175 7 Find Single Element Fuse size SEFuse AMPS 390 SE 8 Display percent used FLC 300 9 Find Inverse Time Ci...

Страница 48: ...ed in the upper left area of the display 4 Solve for Starter Size Starter STAR SIZE 2 OVERLOAD PROTECTION SIZE What Overload Protection device size is required for an Induction motor with a nameplate...

Страница 49: ...re 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...

Страница 50: ...r if necessary Cu Al 1 60 Cu 1PH 4 Enter Volts VOLT 115 5 Enter Horsepower IND 10 HP If IND is not shown press until IND is displayed in the upper left area of the display 6 Display Full Load Amps FLC...

Страница 51: ...re Type quantity is not defined the calculator will assume 2 THHN wires for 1 and 3 THHN wires for 3 when calculating Conduit Size Finding Conduit Sizes For Multiple Conductors Same Wire Type and Size...

Страница 52: ...rough an existing 3 inch EMT Conduit How many XHHW wires How many THW wires KEYSTROKE DISPLAY 0 1 Set to Copper if necessary Cu Al Cu 0 2 Enter Conduit Type Cond Type EMT nonE COND 3 Enter Wire Size A...

Страница 53: ...The cross sectional Areas are the same for both THHN and THWN display will show as THHN KEYSTROKE DISPLAY 0 1 Set to 75 C 75 75 0 2 Set to Copper if necessary Cu Al 75 Cu 0 3 Enter Conduit Type Cond T...

Страница 54: ...e size can also be entered in Circular Mils e g 10 5 600 enters 105 600 CMILs and displays 0 AWG Wire Size 66360 enters 66 360 CMILs and displays 2 AWG Wire Size CONVERTING KILOWATT HOUR AND BTU Find...

Страница 55: ...uivalent 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 Re...

Страница 56: ...Fuse Breaker Motor Type 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 batte...

Страница 57: ...o perform a Full Reset PREFERENCE OPTIONS 1 NEC Code 2011 Sets the calculator to 2011 NEC Code Year 2008 Sets the calculator to 2008 NEC Code Year 2005 Sets the calculator to 2005 NEC Code Year 2002 S...

Страница 58: ...d table references are based on NEC 2011 Previous code years may have different table references APPENDIX D CARE INSTRUCTIONS Please follow the guidelines listed in this section for proper care and op...

Страница 59: ...ondition press the button once At this point you can determine what caused the error and re key the problem Error Codes DISPLAY ERROR TYPE OFLO Overflow answer too large to display ENT Error Invalid e...

Страница 60: ...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...

Страница 61: ...our 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...

Страница 62: ...ACKING 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...

Страница 63: ...NY 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 emplo...

Страница 64: ...Industries by Spe cialty Calculator Technologies LLC 2011 User s Guide copyrighted by Calculated Industries Inc 2011 ElectriCalc Pro is a trademark and Calculated Industries is a regis tered trademark...

Страница 65: ...duct 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 vi...

Страница 66: ......

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