Table of Contents ELECTRICALC® PRO...........................................................................3 GETTING STARTED.............................................................................4 KEY DEFINITIONS..................................................................................4 Basic Function Keys ...........................................................................4 Mode Set-up Keys...............................................................................
(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.....................................................
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 2011 (and 2008, 2005, 2002, 1999, 1996) and future National Electrical Codes, allowing you to solve Code-related problems quickly and accurately.
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. Arithmetic operation keys.
Memory Clear (M-R/C) — Clears Accumulative Memory without changing current display. Percentage — Used to find a given percent of a number. x2 — 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).
(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). Note: The temperature units can be displayed in Celsius (°C) or Fahrenheit (°F) by changing the Preference Setting (see Preference Settings section).
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).
(cont’d) 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.
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.
(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 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.
♦ Second Press Displays the maximum adjusted Ampacity of the Derated Wire Size. ♦ Third Press Displays the Derated Adjustment Factor per the NEC Table 310.15(B)(3)(a). ♦ Fourth Press 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.
(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). Only actual Wire Sizes are considered valid entries. ♦ First Press Calculates the copper Grounding electrode conductor size if you have entered a valid Wire Size.
♦ Second Press Displays the aluminum Grounding conductor size. ♦ Third Press 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.
(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. Once set, the Motor Type remains fixed until you change it or perform a Clear All ( ). ♦ First Press Displays the current Motor Type. Note there is no Motor Type in Single-Phase mode.
♦ Second Press Displays the Full-Load Current percent multiplier value used to determine Fuse size. Subsequent presses repeat this cycle. Inverse Time Breaker — ♦ First Press Displays the minimum Amp rating for an Inverse Time Breaker, based on the Phase, Motor Type, and Amperage. ♦ Second Press Displays the Full-Load Current percent multiplier value used to determine Breaker Size.
(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. ♦ Second Press Shows total cross-sectional area for all entered Wires. ♦ Third Press Shows total cross-sectional area of all entered Wires of the selected Wire Insulation.
♦ 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. Conduit Type (Cond Type) — Used to select the desired Conduit Type.
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).
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 5. 1. 6. 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.
(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+ KEYSTROKE (M+) (M+) (M+) DISPLAY M+ 355. & M+ 255. & M+ –745. & TTL – 135. & AVG – 45. & CNT 3. & – 135.
FUNCTION Store single value in M1 Clear M1 Recall M1 KEYSTROKE Store 175 into M1, recall the value, and then clear the value. KEYSTROKE DISPLAY 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.
Finding Amps What is the current (Amps) for a load drawing 8,250 Volt-Amps on a 240 Volt, Three-Phase circuit? KEYSTROKE DISPLAY 0. 1. Set to 3-Phase: (3Ø) 3Ø 2. Enter VA: VA 8,250. 3. Enter Volts: VOLT 240. 4. Solve for Amps: 3 PH AMPS 19.
KEYSTROKE 3. Enter as VA: 4. Enter Volts: 5. Solve for Amps: 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. 1. Set to 3-Phase: (3Ø) 2. Enter kilowatts: 3. Enter Volts: 4. Solve for Amps: 3Ø PH KW 75. VOLT 208. AMPS 208.
(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 0. 1. Set to 3-Phase: (3Ø) 2. Enter Volts: 3. Enter Amps: 4. Solve for kVA: 3Ø 3 PH VOLT 208. AMPS 65. KVA 23.
KEYSTROKE 1. Set to 1-Phase: (1Ø) 2. Enter Volts: 3. Set Power Factor: (PF%) DISPLAY 1Ø 1 PH VOLT 120. PF% 87. 4. Enter Amps: 5. Solve for Watts: 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? KEYSTROKE DISPLAY 0. 1. Set to 3-Phase: (3Ø) 2. Set Power Factor: (PF%) 3. Enter Amps: 4. Enter Volts: 5. Solve for kW: 3Ø 3 PH PF% 100. AMPS 90. VOLT 208. KW 32.
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.
KEYSTROKE 2. Enter Voltage: (Vdc) 3. Find Current: (Idc) DISPLAY Vdc 12. V 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 (in Ohms) of the circuit. KEYSTROKE DISPLAY 0. 1. Enter Voltage: (Vdc) 2. Enter Current: (Idc) 3. Find Resistance: (R) Vdc 240. V Idc 14.6 A OHMS 16.
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 0. 1. Set to 1-Phase: (1Ø) 2. Enter Volts: 3. Enter HP: 1Ø 1 PH VOLT 230. 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.
KEYSTROKE DISPLAY 5. Enter HP: IND* 10. HP 10 * 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 A 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.
(cont’d) KEYSTROKE 5. Solve for HP: 6. Set to Induction motor: (Ind/Sync/DC) DISPLAY SYNC 25. HP IND 0. Finding Direct Current Motor Horsepower 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: 3. Enter Amps: 4. Solve for HP: 5.
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 0. 1. Set to 1-Phase: (1Ø) 2. Set to 60º C: (60º) 3. Set to Copper (if necessary): (Cu/Al) 1Ø 1 PH 1 Ø 60 1 PH 1 Ø 60 Cu 1 PH 4. Enter kVA: KVA 30. 5. Enter Volts: 6. Find Amps: 7. Find Wire Size: 8. Display Wire Ampacity: VOLT 240. AMPS 125.
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 0. 1. Set to 3-Phase: (3Ø) 3Ø 2. Set to 75º C: (75º) 3Ø 75 3. Set to Copper (if necessary): (Cu/Al) 3Ø 75 Cu 4. Enter Amps: 3 PH 3 PH AMPS 260. 5. Find Wire Size: 6.
KEYSTROKE DISPLAY 2. Set to 90º C: (90º) 3. Set to Copper (if necessary): (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 7. Find Wire Size: 8. Change Ambient temperature: (Ambº) AWG 000 CU 1Ø 90 Cu Amb 9. Find adjusted Wire Size: WIRE SIZE AMB° 20. ºC AWG 00 CU WIRE SIZE 10. Display Wire Ampacity: ØØ* 210.
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 0. 1. Set to 3-Phase: (3Ø) 2. Set to 75º C: (75º) 3. Set to Copper (if necessary): (Cu/Al) 4. Enter Amps: 3 PH 3Ø 75 3 PH 3Ø 75 Cu 3 PH AMPS 265. 5. Find Wire Size: 6. Change to Aluminum: (Cu/Al) 3Ø 3Ø 75 Al AWG 300 CU WIRE SIZE AWG 400 AL WIRE SIZE 7. Display Wire Ampacity: 4ØØ* 270.
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 0. 1. Set to 60º C: (60º) 60 0. 60 Cu 0. 60 Cu FrAir 0. 2. Set to Copper (if necessary): (Cu/Al) 3. Set to Free Air mode: (FrAir) 4. Enter Amps: 5. Find Wire Size for one conductor: 6.
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 0. 1. Set to 75º C: (75º) 2. Set to Copper (if necessary): (Cu/Al) 3. Enter Amps: 5. Find Derated Wire Size: (D/R Size) 0. 75 Cu 0. AMPS 65. 4. Find normal Wire Size: 75 AWG 6 CU WIRE SIZE D/R 3 CU WIRE SIZE 6. Display Wire Ampacity: 7. Display Adjustment Factor: 8. Display NEC Table: D/R 45.5 WIRE A ADJ 70.
KEYSTROKE DISPLAY 1. Set to 3-Phase: (3Ø) 2. Set to 60º C: (60º) 3. Set to Copper (if necessary): (Cu/Al) 4. Enter Volt-Amps: 5. Enter Volts: 3Ø 60 3 PH 3Ø 60 Cu 3 PH VOLT 240. 7. Find Adjusted Wire Size: 3 PH VA 47,650. 6. Set to 50º C Ambient Temperature: (Ambº) 3Ø 3Ø 60 Cu Amb AMB° 50. ºC AWG 250 CU WIRE SIZE D/R 500 CU WIRE SIZE 8. Find Derated Wire Size: (D/R Size) 9. Display Wire Ampacity: 10. Display Adjustment Factor: 11.
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.
KEYSTROKE DISPLAY 0. 1. Set to 1-Phase: (1Ø) 1Ø 1 PH 1 Ø 75 1 PH 1 Ø 75 Cu 1 PH 2. Set to 75 º C: (75º) 3. Set to Copper (if necessary): (Cu/Al) 4. Enter Amps: AMPS 11. 5. Enter Volts: VOLT 208. 6. Enter Length: FEET 175. 7. Enter Wire Size: * 8. Solve Voltage Drop: 9. Solve percent Voltage Drop: AWG 8 CU WIRE SIZE DROP 3.0 V DROP 1.4 % V * Wire size can also be entered in Circular Mils (e.g.
(cont’d) KEYSTROKE DISPLAY 0. 1. Set to 3-Phase: (3Ø) 2. Set to 75 º C: (75º) 3. Set to Copper (if necessary): (Cu/Al) 4. Enter Amps: 5. Enter Volts: 6. Enter Length (Feet): 7. Enter Wire Size: 8. Solve Voltage Drop: 9. Solve percent Voltage Drop: 3Ø 3 PH 3Ø 75 3 PH 3Ø 75 Cu 3 PH AMPS 20. VOLT 230. FEET 150. AWG 10 CU WIRE SIZE DROP 6.4 V DROP 2.
KEYSTROKE DISPLAY 2. Set to 75º C: (75º C) 3. Set to Copper (if necessary): (Cu/Al) 3Ø 75 3 PH 3Ø 75 Cu 3 PH 4. Enter Amps: AMPS 20. 5. Enter Volts: VOLT 208. 6. Enter Length: FEET 175. 7. Enter allowable VD%: DROP 3.0 % V 8. Find Wire Size: 9. Find actual Voltage Drop: AWG 8 CU VD WIRE SIZE DROP 4.7 V 10. Find percent Voltage Drop: DROP 2.
(cont’d) KEYSTROKE 2 Set to 60º C: (60º) 3. Set to Copper (if necessary): (Cu/Al) 4. Enter Amps: 5. Enter Volts: 6. Enter Wire Size: * 7. Enter 3% allowable Voltage Drop: 8. Find distance: 9. Find actual Voltage Drop: 10. Find percent Voltage Drop: DISPLAY 3Ø 60 3Ø 60 Cu 3 PH 3 PH AMPS 15. VOLT 240. AWG 10 CU WIRE SIZE DROP 3.0 % V FEET 234.86987 DROP 7.2 V DROP 3.0 % V * Wire size can also be entered in Circular Mils (e.g.
Finding Voltage Drop Resistance What is the Resistance of 85 Feet of #2 90° C Copper conductor? KEYSTROKE DISPLAY 0. 1. Set to 90º C: (90º) 90 2. Set to Copper (if necessary): (Cu/Al) 3. Enter Wire Size: * 4. Find Resistance: (Wire Res) 5. Find 85-foot Resistance**: 90 Cu AWG 2 CU 0. 0. WIRE SIZE OHMS 0.2033993 WIRE 0.0172889 * Wire size can also be entered in Circular Mils (e.g., enters 10,380 CMILs and displays 10 AWG Wire Size).
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.
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.
(cont’d) KEYSTROKE 1. Set to 3-Phase: (3Ø) 2. Enter Volts: 3. Enter HP: DISPLAY 3Ø 3 PH VOLT 230. IND* 50. HP * If IND is not shown, press until IND is displayed in the upper left area of the display. 4. Find Full-Load Current: 5. Find Dual Element Fuse size: 6. Display percent used: 7. Find Single Element Fuse size: (SEFuse) FLC 130. A AMPS 227.5 dE %FLC 175. % AMPS 390. SE 8. Display percent used: %FLC 300. % 9.
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: 3. Enter HP: 3Ø 3 PH VOLT 575. IND* 20. HP * If IND is not shown, press until IND is displayed in the upper left area of the display. 4. Solve for Starter Size: (Starter) STAR 2 SIZE OVERLOAD PROTECTION SIZE What Overload Protection device size is required for an Induction motor with a nameplate Current rating of 19.
(cont’d) KEYSTROKE DISPLAY 4. Find 125% Load: AMPS 24. o l 5. Display percent used: %FLC 125. % 6. Reset 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. The calculator uses NEC values for area of THW/THHW, XHH/XHHW, and THHN/THWN wires.
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 0. 1. Set to 1-Phase: (1Ø) 1Ø 1 PH 1 Ø 60 1 PH 1 Ø 60 Cu 1PH 2. Set to 60º C: (60º) 3. Set to Copper (if necessary): (Cu/Al) 4. Enter Volts: VOLT 115. 5. Enter Horsepower: IND* 10.
(cont’d) KEYSTROKE DISPLAY 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.
KEYSTROKE 5. Find Conduit Size: DISPLAY 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? KEYSTROKE DISPLAY 0. 1. Set to Copper (if necessary): (Cu/Al) 2.
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. KEYSTROKE DISPLAY 0. 1. Set to 75º C: 75 0. 75 Cu 0. (75º) 2. Set to Copper (if necessary): (Cu/Al) 3.
KEYSTROKE 10. Find Conduit Size: DISPLAY FMC 1.50 in COND SIZE 4. TTL WIRES 11. Find total number of Wires: 12. Find Conduit Fill Percent: 13. Find actual Fill Area: 14. Find Remaining Area: FILL 36.1 % FILL 0.6711 COND TTL WIRE AREA REM 0.0717 WIRE AREA * Wire 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).
(cont’d) KEYSTROKE DISPLAY 1. Enter BTU rating: 4,500. 2. Find equivalent kilowatt hours: (Btu►Kw-hr) 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.
APPENDIX A — DEFAULT SETTINGS After a Clear All ( ), your calculator will return to the following settings: STORED VALUES DEFAULT VALUE Insulation Rating 60º C Wire Type Rating Copper Phase 3Ø Ambient Temperature 30º C (86º F) Volts 240V 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 return to its default upon turning t
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 O, hold down x, and press o), 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 above the C key will also perform a Full Reset.
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 trademarks of the National Fire Protection Association, Inc., Quincy, MA 02269. All listed table references are based on NEC 2011. Previous code years may have different table references.
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.
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.
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.
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.
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.
Legal Notes Software copyrighted and licensed to Calculated Industries by Specialty Calculator Technologies, LLC, 2011. User’s Guide copyrighted by Calculated Industries, Inc., 2011. ElectriCalc® Pro is a trademark and Calculated Industries® is a registered trademark of Calculated Industries, Inc. © 2011. ALL RIGHTS RESERVED Designed in the U.S.A.
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