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Table of Contents
Related Manuals for Calculated Industries ElectriCalc Pro
Summary of Contents for Calculated Industries ElectriCalc Pro
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Page 2: Table Of Contents
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... - Page 3 (cont’d) 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...
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Page 4: Electricalc ® Pro
eleCTRICalC ® 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 2011 (and 2008, 2005, 2002, 1999, 1996) and future National Electrical Codes, allowing you to solve Code-related problems quickly and accurately. -
Page 5: Getting Started
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 —... -
Page 6: Mode Set-Up Keys
Memory clear (M-r/c) — Clears Accumulative Memory without changing current display. percentage — Used to find a given percent of a number. — Squares the value on the display. Backspace Function — Used to delete entries ... -
Page 7: Electrical Keys
(cont’d) ambient temperature (amb°) — Permanently enters ambient temperature for determining ampacity-derived Wire Sizes. Ambient temperature will only change when entering a new value or by resetting the calculator. Defaults to 30°C (86°F). amb will display when the Ambient Temperature is other than 30°C (86°F). - Page 8 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.
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Page 9: Motor Keys
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. -
Page 10: Wire Sizing Keys
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. - Page 11 (cont’d) ♦ 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 — Used for Motor Wire Sizing ...
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Page 12: Voltage Drop Keys
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. -
Page 13: Grounding Conductor Keys
(cont’d) 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). -
Page 14: Fuse/Breaker Keys
Displays the NEC table referenced for the calculation. fuse/breaker Keys The ElectriCalc Pro has special keys that automatically calculate the Amp ratings of the following over-current protection devices: Dual Element Fuses (Time Delay), Single Element Fuses (Non-Time Delay), Instantaneous Trip Breakers (Type 1), Inverse Time Breakers (Type 2), and Overload Protection Devices. - Page 15 (cont’d) ♦ Second Press 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.
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Page 16: Conduit Sizing Keys
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. - Page 17 (cont’d) Number of Wires — Used to enter or calculate , , the Number of Wires in a raceway and calculate cross-sectional Wire Area. ♦ First Press Enters Number of Wires or calculates maximum Number of Wires in Conduit. ♦...
- Page 18 ♦ Third Press Shows Fill Percentage for the calculated Conduit Size as determined by NEC Table 1, Chapter 9. ♦ Fourth Press 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.
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Page 19: Preference Settings
PREFERENCE SETTINGS Press , then to access the Preferences menu. Continue pressing to toggle through different Preferences. Press or keys to toggle between 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). -
Page 20: Basic Math Operations
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 ... -
Page 21: Using M
(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 ... -
Page 22: Using The Electricalc Pro
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 Volt- amps and 115 Amps. -
Page 23: Finding Amps
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: 3 Ph (3Ø) 3Ø 2. Enter VA: Va 8,250. 3. -
Page 24: Finding Amps From Kilowatts
KeysTRoKe DIsPlay 3. Enter as VA: Va 43,370. 4. Enter Volts: VolT 240. 5. Solve for Amps: aMPs 180.70833 finding amps from Kilowatts What is the Amperage for a 75 kW load connected in a 120/208 Volt, 3Ø... -
Page 25: Finding Kva Rating
(cont’d) KeysTRoKe DIsPlay 2. Enter Volts: VolT 120. 3. Enter Amps: aMPs 22. 4. Solve for Volt-Amps: Va 2,640. 5. Solve for kVA: KVa 2.64 finding kVa Rating What is the kVA rating for a 120/208 Volt, Three-Phase, 65 Amp transformer? KeysTRoKe DIsPlay... -
Page 26: Finding Kw Rating
KeysTRoKe DIsPlay 1. Set to 1-Phase: 1 Ph (1Ø) 1 Ø 2. Enter Volts: VolT 120. 3. Set Power Factor: Pf% 87. (PF%) 4. Enter Amps: aMPs 45. 5. -
Page 27: Ohm's Law
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... -
Page 28: Finding Resistance (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). -
Page 29: Finding Single-Phase Full-Load Current
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? KeysTRoKe DIsPlay 1. Set to 1-Phase: 1 Ph (1Ø) 1 Ø 2. Enter Volts: VolT 230. -
Page 30: Finding Synchronous Motor Horsepower
KeysTRoKe DIsPlay 5. Enter HP: InD* 10. hP * If iND is not shown, press until iND is displayed in the upper left area of the display. 6. Find Full-Load Current: flC 28. 7. Find 125% Ampacity Wire Size: (125%) aWG 8 Cu ... -
Page 31: Finding Direct Current Motor Horsepower
(cont’d) KeysTRoKe DIsPlay 5. Solve for HP: synC 25. hP 6. Set to Induction motor: InD 0. (Ind/Sync/DC) finding Direct Current Motor horsepower A Direct Current motor is defined as having a 10 Amp load on a 180 Volt circuit. -
Page 32: Wire Sizing Based On Insulation Rating
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? KeysTRoKe DIsPlay 1. Set to 1-Phase: 1 Ph (1Ø) ... -
Page 33: Re-Sizing Wire Based On Different Insulation Ratings
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? KeysTRoKe DIsPlay 1. - Page 34 KeysTRoKe DIsPlay 2. Set to 90º C: 1 Ph (90º) 1 Ø 90 3. Set to Copper (if necessary): 1 Ph (Cu/Al) 1 Ø 90 Cu 4. Enter VA: Va 47,700. 5.
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Page 35: Wire Sizing Based On Material Type
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? KeysTRoKe DIsPlay 1. Set to 3-Phase: 3 Ph (3Ø) ... -
Page 36: Sizing Parallel Conductors
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? KeysTRoKe DIsPlay 1. -
Page 37: Finding Derated Wire Size
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? KeysTRoKe DIsPlay 1. Set to 75º C: (75º) 2. Set to Copper (if necessary): (Cu/Al) ... - Page 38 KeysTRoKe DIsPlay 1. Set to 3-Phase: (3Ø) 3 Ph 3Ø 2. Set to 60º C: (60º) 3 Ph 3Ø 60 3. Set to Copper (if necessary): 3 Ph (Cu/Al) 3Ø 60 Cu 4. Enter Volt-Amps: Va 47,650.
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Page 39: Voltage Drop
IMPoRTanT noTe on VolTaGe DRoP CalCulaTIons The ElectriCalc Pro calculates Voltage Drop and Wire Size using DC Resistance as defined by the 2011 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. -
Page 40: Finding Three-Phase Voltage Drop
KeysTRoKe DIsPlay 1. Set to 1-Phase: 1 Ph (1Ø) 1 Ø 2. Set to 75 º C: (75º) 1 Ph 1 Ø 75 3. Set to Copper (if necessary): (Cu/Al) 1 Ph 1 Ø... -
Page 41: Finding Voltage Drop Wire Size
(cont’d) KeysTRoKe DIsPlay 1. Set to 3-Phase: (3Ø) 3 Ph 3Ø 2. Set to 75 º C: 3 Ph (75º) 3Ø 75 3. Set to Copper (if necessary): 3 Ph (Cu/Al) 3Ø 75 Cu 4. -
Page 42: Finding Voltage Drop Distance
KeysTRoKe DIsPlay 2. Set to 75º C: (75º C) 3 Ph 3Ø 75 3. Set to Copper (if necessary): 3 Ph (Cu/Al) 3Ø 75 Cu 4. Enter Amps: aMPs 20. 5. Enter Volts: VolT 208. - Page 43 (cont’d) KeysTRoKe DIsPlay 2 Set to 60º C: 3 Ph (60º) 3Ø 60 3. Set to Copper (if necessary): (Cu/Al) 3 Ph 3Ø 60 Cu 4. Enter Amps: aMPs 15. 5. Enter Volts: VolT 240.
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Page 44: Finding Voltage Drop Resistance
finding Voltage Drop Resistance What is the Resistance of 85 Feet of #2 90° C Copper conductor? KeysTRoKe DIsPlay 1. Set to 90º C: (90º) 2. Set to Copper (if necessary): (Cu/Al) 90 Cu 3. -
Page 45: 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). -
Page 46: Equipment Grounding Counductor Wire Size
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. - Page 47 (cont’d) KeysTRoKe DIsPlay 1. Set to 3-Phase: (3Ø) 3 Ph 3Ø 2. Enter Volts: VolT 230. 3. Enter HP: InD* 50. hP * If iND is not shown, press until iND is displayed in the upper left area of the display.
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Page 48: Starter Size
STaRTER SIZE What NEMA size Starter is required for a 575 Volt, 3Ø, 20 HP Induction motor? KeysTRoKe DIsPlay 1. Set to 3-phase: (3Ø) 3 Ph 3Ø 2. Enter Volts: VolT 575. 3. -
Page 49: Conduit Size
6. Reset Overload rating and Clear: 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. -
Page 50: Finding Motor Branch-Circuit Wire Size And Conduit Size
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? KeysTRoKe DIsPlay 1. -
Page 51: Finding Conduit Sizes For Multiple Conductors
(cont’d) KeysTRoKe DIsPlay 10. Find total number of Wires: 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... -
Page 52: Finding Number Of Wires In Existing Conduit - Same Size, Various Types
KeysTRoKe DIsPlay 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. -
Page 53: Finding Conduit 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;... -
Page 54: Converting Kilowatt-Hour And Btu
KeysTRoKe DIsPlay 10. Find Conduit Size: fMC 1.50 in ConD sIZe 11. Find total number of Wires: TTl WIRes 12. Find Conduit Fill Percent: fIll 36.1 % ConD 13. Find actual Fill Area: fIll 0.6711 TTl WIRe aRea 14. -
Page 55: Parallel Resistance
(cont’d) KeysTRoKe DIsPlay 1. Enter BTU rating: 4,500. 2. Find equivalent kilowatt hours: KW-h 1.3176 (Btu►Kw-hr) PaRallEl RESISTaNCE Find the equivalent Resistance for 10 Ohm, 20 Ohm, and 50 Ohm resistors placed in parallel. KeysTRoKe DIsPlay ... -
Page 56: Appendix A - Default Settings
aPPenDIX a — DeFaUlt SettiNGS After a Clear All ( ), your calculator will return to the following settings: sToReD Values DefaulT Value 60º C Insulation Rating Copper Wire Type Rating 3Ø Phase Ambient Temperature 30º C (86º f) Volts 240V Voltage Drop % Power Factor %... -
Page 57: Appendix B - Preference Settings
– 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... -
Page 58: Appendix C - 2011 Nec References
aPPenDIX C — 2011 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 ®... -
Page 59: Appendix E - Accuracy/Errors, Auto Shut-Off, Batteries, Reset
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. - Page 60 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.
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Page 61: Repair And Return
RETuRN GuIDElINES 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. If your product won’t turn on, check the battery as outlined in the User’s Guide. -
Page 62: Warranty
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. - Page 63 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,”...
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Page 64: Legal Notes
Software copyrighted and licensed to Calculated 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 of Calculated Industries, Inc. © 2011. - Page 65 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.
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