5060-UG-B-Composite 4/4/03 12:37 PM USER’S GUIDE ELECTRICALC PRO ® MODEL 5060 3O 60 Cu VD WIRE SIZE 125% CONSTRUCTION MASTER ® ELECTRICALC PRO ® Off On/C Cond Type CondSz #THW #XHHW #THHN VD% Starter SEFuse InsTrip M–Type Wire Res HP motor DEFuse InvTime O-Load Length Eff% milli– EqGrnd D/R Size 125% HP th kilo– Grnd ParSz WireSz VA Volts Amps 75 ° Ind/Sync 90 ° 7 8 9 PF% Watts Set ___ √x DC Res Cu/Al FrAir 60 ° Stor 4 5 6 M–R/C 1Ø Amb ° 3Ø R
5060-UG-B-Composite 4/4/03 12:37 PM Page 2
5060-UG-B-Composite 4/4/03 12:37 PM Introducing the ElectriCalc® Pro Now NEC ®-Updateable! 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 2002 and future National Electrical Codes, allowing you to solve Code-related problems quickly and accurately.
5060-UG-B-Composite 4/4/03 12:37 PM The ElectriCalc Pro instantly solves for the following: ♦ Volts, Amps, Volt-Amps, Watts, kVA, kW, PF%, EFF%, and DC Resistance ♦ Copper or Aluminum Wire Sizes ♦ Parallel & Derated Wire Sizes ♦ Voltage Drop Wire Sizes, % and Actual Voltage Drops, Voltage Drop Distances and Wire Resistances ♦ Grounding Conductors Sizes ♦ Motor Full-Load Amps ♦ Overload Protection Sizes ♦ NEMA Starter Sizes ♦ Conduit Sizes ♦ And much more! 2 — ElectriCalc Pro Page 4
060-UG-B-Composite 4/4/03 12:37 PM Table of Contents Installing NEC Updates . . . . . . . . . . . . . .4 Key Definitions . . . . . . . . . . . . . . . . . . .5 Preference Settings . . . . . . . . . . . . . . .26 Default Settings . . . . . . . . . . . . . . . . .27 Basic Math Operations . . . . . . . . . . . . .28 Percent Calculations . . . . . . . . . . . . . .28 Memory Functions . . . . . . . . . . . . . . . .29 Kerchoff’s Law . . . . . . . . . . . . . . . . . .30 Motor Horsepower . . . . . . . . . . .
5060-UG-B-Composite 4/4/03 12:37 PM Installing NEC Updates Your ElectriCalc Pro is now updateable for future National Electrical Code® editions that are updated every three (3) years (next Code update is 2005). To upgrade your unit, follow the instructions below: 1) Purchase the NEC Update from CI (see pricing & details from CI’s Web site: www.calculated.com or call 1800-854-8075). This Update is in the form of a chip that contains the new Code.
5060-UG-B-Composite 4/4/03 12:37 PM Key Definitions Standard Calculator Functions [On/C] — On/Clear Turns on power. Pressing once clears the last entry and the display. Pressing twice clears all non-permanent values. [Off] — Off Turns all power off. Clears the memory and most internal registers. [+] [–] [x] [÷] [=] Arithmetic operation keys. [0] – [9] & [•] Used for keying in numbers. [%] — Percent Four function percent key.
5060-UG-B-Composite 4/4/03 12:37 PM [Set] — Second Function Accesses the secondary functions shown above the keys when pressed prior to selection. [Stor] — Store Used to store values when pressed just before a storage register (i.e., M+, AMPS, VOLTAGE, etc.). Displays: STOR. [Rcl] — Recall Recalls a value stored in a register (e.g., to recall voltage drop % press [Rcl] [VD%]). Displays: RCL. [Set] [ + ] — Pi (π) Constant = 3.
5060-UG-B-Composite 4/4/03 12:37 PM [Stor] [0] — Cumulative Memory Adds displayed value to Memory (e.g., 10 [M+], 20 [M+], [Rcl] [M+] = 30). Clears when the calculator is shut off. [Rcl] [0] — Memory Recall Displays the value saved in (M+). [Rcl] [Rcl] — Display/Clear Memory Displays and clears the value saved in (M+). [Set] [Rcl] — Clear Memory Clears the value saved in (M+) without changing displayed value.
5060-UG-B-Composite 4/4/03 12:37 PM [Set] [3] — Three-Phase (3Ø) Sets calculator to three-phase mode. Displays: 3Ø. [Set] [2] — 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 ([Set] [x]). Defaults to 30°C (86°F). Amb° will display when the ambient temperature is other than 30°C (86°F). Displays: Amb°.
5060-UG-B-Composite 4/4/03 12:37 PM [Set] [5] — Free Air (FrAir) Sets calculator into Free Air mode, which refers to NEC Table 310-17 for wire size calculations. Displays: FrAir. [Set] [6] — 60°C Wire Insulation Sets calculator to 60°C wire insulation type for wire size calculations. This is the default setting. Displays: 60. [Set] [7] — 75°C Wire Insulation Sets calculator to 75°C insulation type for wire size calculations. Displays: 75.
5060-UG-B-Composite 4/4/03 12:37 PM [Amps] — Amps Enters or calculates amps (using volts and VA or watts). Displays: AMPS, KAMP or mAMP. [Volts] — Volts Enters or calculates volts (using amps, HPth, and VA or watts). Default value is 240 volts. Displays: VOLT, KV, or mV. [Set] [Volts] — DC Resistance Calculates and displays DC resistance. Displays: OHMS. [VA] — Volt-Amps Enters or calculates volt-amps (using amps, volts and horsepower or watts). Displays: VA, KVA, or mVA.
5060-UG-B-Composite 4/4/03 12:37 PM [HPth] — Horsepower (Theoretical) Enters or calculates theoretical horsepower (based on Amps, VA, watts, efficiency%, PF%, and/or volts). 1.0 HPth correlates to 746 watts at 100% efficiency. Displays: HPth. [Set] [HPth] — Efficiency Enters or calculates the percent ratio between real power (watts) and theoretical horsepower. Default: 100%. Entered or calculated efficiencies greater than 100% will result in an error. Displays: EFF%.
5060-UG-B-Composite 4/4/03 12:37 PM [Set] [8] — Induction/ Synchronous Motor Toggle Toggles between induction and synchronous motor types. Displays: SYNC (synchronous) or IND (induction - default). [HPmotor] — Motor Horsepower Enters or calculates motor horsepower. Displays: SYNC HP (synchronous) or HP IND (induction - default). Ampacity Tables The ElectriCalc Pro uses NEC Table 310-16 (310-17 for Free Air) to find wire sizes and ampacity ratings of wires.
5060-UG-B-Composite 4/4/03 12:37 PM ♦ First Press If a wire length has been entered, the first press will show the larger of the ampacity or voltage drop derived wire size. The calculator will use the larger value when calculations require a wire size. If no voltage drop length has been entered, the calculator will display the calculated ampacity rated wire size. ♦ Second Press If a wire length has been entered, the second press displays the smaller of the two wire sizes.
5060-UG-B-Composite 4/4/03 12:37 PM [ParSz] — Parallel Size Used to find the size of parallel conductors using amperage and an entered quantity of wires. Parallel wire size computations smaller than 1/0 are displayed as “none” (display shows “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 of wires in parallel. Displays: PAR WIRE SIZE.
5060-UG-B-Composite 4/4/03 12:37 PM ♦ First Press Calculates the derated wire size, if you have entered the number of wires, for example, 4 [Set] [ParSz]). Displays: D/R WIRE SIZE. ♦ Second Press Displays the maximum adjusted ampacity of the derated wire size. Displays: D/R WIRE A. ♦ Third Press Displays the derated adjustment factor per the NEC Table 310-15(b)(2)(a). Displays: ADJ %.
5060-UG-B-Composite 4/4/03 12:37 PM [VD%] — 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 cannot be found. ♦ First Press Enters a maximum allowable voltage drop percentage (Displays: V DROP %) or calculates actual voltage drop (Displays: V DROP). ♦ Second Press Calculates actual percent voltage drop. Displays: V DROP %.
5060-UG-B-Composite 4/4/03 12:37 PM Ground Function Keys [Grnd] — Ground An output-only key 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. Displays: GRND CU WIRE SIZE.
5060-UG-B-Composite 4/4/03 12:37 PM [Set] [Grnd] — Equipment Ground (EqGrnd) This function uses NEC Table 250-122 to compute the minimum equipment grounding conductor size, given an entered amperage rating or setting for a over-current device up line (i.e., 300 [Set] [Grnd]). 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 Displays the copper grounding conductor size for the entered amp rating.
5060-UG-B-Composite 4/4/03 12:37 PM 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. These fuse and circuit breaker sizes are derived using the “Percent of FullLoad Current” multipliers listed in NEC Table 430-152.
5060-UG-B-Composite 4/4/03 12:37 PM ♦ First Press Displays the current motor type. Note there is no motor type in single-phase mode. ♦ Second Press In three-phase mode only, subsequent presses of [O-Load] will select and display the next motor type from this list: SQ-C non-E (Squirrel Cage, nonDesign E), SQ-C E (Squirrel Cage, Design E), SYNC no codE (Synchronous), WND no codE (Wound Rotor). [DEFuse] — Dual Element Fuse ♦ First Press Calculates the minimum amp rating for a Dual Element Fuse.
5060-UG-B-Composite 4/4/03 12:37 PM ♦ Second Press Displays the full-load current percent multiplier value used to determine fuse size. Subsequent presses repeat this cycle. Displays: %FLC. [Set] [InvTime] — Instantaneous Trip Circuit Breaker ♦ First Press Displays the minimum amp rating for an Instantaneous Trip Circuit Breaker, based on the phase, motor type, and amperage. Displays: AMPS b1. ♦ Second Press Displays the full-load current percent multiplier value used to determine breaker size.
5060-UG-B-Composite 4/4/03 12:37 PM [O-Load] — Overload Protection ♦ First Press Displays the overload amperage requirement based on the full-load current shown on the motor nameplate. Multiplies the entered motor nameplate full-load current (stored in the [Amps] registers) by 115% or the value you enter. Conforms to NEC Section 43032 (a)(1) value of 115% unless you enter another value. For example, entering 125 [O-Load] would calculate overload protection based on 125% of the entered amperage.
5060-UG-B-Composite 4/4/03 12:37 PM Conduit Sizing Keys The ElectriCalc Pro calculates conduit size using NEC Tables 1, 3, 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. Acceptable conduit sizes (depending on the type of conduit used) are as follows: 1/2”, 3/4”, 1”, 1-1/4”, 1-1/2”, 2”, 2-1/2”, 3”, 3-1/2”, 4” 5” and 6”.
5060-UG-B-Composite 4/4/03 12:37 PM ♦ Third Press Shows total cross-sectional area of all entered wires of the selected wire insulation. Displays: TTL WIRE AREA. [CondSz] — Conduit Size Used to find conduit sizes based on the total area of the entered wire types and sizes (up to 15 at one time). If the quantity and insulation type has not been entered, the calculator will assume 2 THHN wires for single-phase or 3 THHN wires for three-phase calculations. ♦ First Press Enters or calculates conduit size.
5060-UG-B-Composite 4/4/03 12:37 PM ♦ Third Press Shows fill percentage for the calculated conduit size as determined by Table 1, Chapter 9. Displays: COND FILL %. ♦ Fourth Press Shows the total wire area for all entered wires. Displays: FILL TTL WIRE AREA. ♦ 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. Displays: REM WIRE AREA.
5060-UG-B-Composite 4/4/03 12:37 PM Preference Settings Your calculator has the following Preference Settings that you can access and change at any time. Reach the Preference Function by pressing [Set] [÷]. Then, to access each category, press the [÷] key until the desired setting is reached. Within each category, press the [+] or [-] keys to toggle between individual selections (note: the [+] will advance, the [-] will back-up).
5060-UG-B-Composite 4/4/03 12:37 PM Default Settings When you first receive your calculator, it is pre-set to the default settings listed below. You can always return your calculator to these default values with an All-Clear ([Set] [x]).
5060-UG-B-Composite 4/4/03 12:37 PM Basic Math Operations This calculator uses standard chaining logic, which simply means that you enter your first value, the operator (+, –, x, ÷), the second value and then the equals sign (=). A. B. C. D. 3 3 3 3 [+] [–] [x] [÷] 2 2 2 2 [=] [=] [=] [=] 5 1 6 1.5 Percent Calculations The percent key [%] can be used for finding a given percentage of a number or for working add-on, discount or division percentage calculations. 355 250 25 100 [x] [+] [–] [÷] 15 6.
5060-UG-B-Composite 4/4/03 12:37 PM Memory Functions Whenever the [Stor] [0] (M+) keys are pressed, the displayed value will be added to memory.
5060-UG-B-Composite 4/4/03 12:37 PM Kerchoff’s Law The ElectriCalc Pro utilizes Kerchoff’s Law in finding volts, amps, volt-amps, watts, horsepower (theoretical), efficiency and power factor. Finding Voltage Find the voltage supply to a singlephase load drawing 14,605 volt-amps and 115 amps. Steps Keystrokes Clear calculator Set to 1-phase Enter VA Enter amps Solve for volts [On/C] [On/C] [Set] [1] 14605 [VA] 115 [Amps] [Volts] Display 0. 1 PH 14,605. VA 115. AMPS 127.
5060-UG-B-Composite 4/4/03 12:37 PM Finding Current Load A building with 120/240 volt 1Ø service has the following loads: Range = 7,800 VA Dryer = 5,100 VA Lighting = 6,470 VA Heating = 15,100 VA Appliances = 8,900 VA What is the service load (amps) of the circuit supplying this building? Steps Keystrokes Clear calculator Set to 1-phase Add VA loads: [On/C] [On/C] 0. [Set] [1] 1 PH 7,800 + 15,100 + 5,100 + 8,900 + 6,470 [=] 43,370. [VA] 43,370. VA 240 [Volts] 240. VOLT [Amps] 180.
5060-UG-B-Composite 4/4/03 12:37 PM Finding Volt-Amps What is the VA rating for a 120 volt, 22 amp, 1Ø circuit? What is the kVA rating? Steps Keystrokes Clear calculator Set to 1-phase Enter volts Enter amps Solve volt-amps Solve for kVA [On/C] [On/C] [Set] [1] 120 [Volts] 22 [Amps] [VA] [kilo-] [VA] Display 0. 1 PH 120. VOLT 22. AMPS 2,640. VA 2.
5060-UG-B-Composite 4/4/03 12:37 PM Finding Wattage A 120 volt single-phase 45 amp electrical motor has an 87% power factor. What is its wattage? Steps Keystrokes Display Clear calculator Set to 1-phase Enter volts Set power fact % Enter amps Solve for watts [On/C] [On/C] 0. [Set] [1] 1 PH 120 [Volts] 120. VOLT 87 [Set] [Watts] 87. PF% 45 [Amps] 45. AMPS [Watts] 4,698.
5060-UG-B-Composite 4/4/03 12:37 PM Motor Horsepower The ElectriCalc Pro can calculate the full load current (amps) of a motor, based on phase, voltage and motor (synchronous or induction). It uses NEC Tables 430-148 and 430-150 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 Error 8).
5060-UG-B-Composite 4/4/03 12:37 PM 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? Steps Keystrokes Reset calculator Set to 1-phase Enter volts Enter HPind Find full load amps [On/C] [Set] [1] 230 [Volts] 2 [HPmotor] [Amps] Display 0. 1 PH 230. VOLT 2. HP IND 12.
5060-UG-B-Composite 4/4/03 12:37 PM Finding Synchronous Motor Horsepower A synchronous motor is defined as having a 27 amp load on a 240 volt, 3Ø circuit. What is its horsepower? Steps Keystrokes Display Reset calculator Set to synch. Enter volts Enter amps Solve for Hp [On/C] [Set] [8] 240 [Volts] 27 [Amps] [HPmotor] 0. 0. SYNC 240. VOLT 27. AMPS 25.
5060-UG-B-Composite 4/4/03 12:37 PM 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? Steps Keystrokes Display Clear calculator Set to 1-phase Set to 60˚C Enter kVA Enter volts Find amps Find CU wire size [On/C] [On/C] 0. [Set] [1] 1 PH [Set] [6] 1Ø 60 Cu 1 PH 30 [kilo-] [VA] 30. KVA 240 [Volts] 240. VOLT [Amps] 125.
5060-UG-B-Composite 4/4/03 12:37 PM Wire Sizing Based on Ambient Temperature Find the 90°C aluminum wire size needed to connect a 47,700 volt-amp load to a 240 volt, single-phase source. What is the adjusted wire size, if the ambient temperature rating is changed from the default 30°C to 40°C? Steps Keystrokes Clear calculator Set to 1-phase Set to 90°C Set toAl Enter VA Enter volts Find amps Find wire size [On/C] [On/C] 0.
5060-UG-B-Composite 4/4/03 12:37 PM 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? Steps Keystrokes Reset calculator Set to 75°C Enter amps Find wire size [Set] [x] [On/C] 0. [Set] [7] 3Ø 75 Cu 0. 265 [Amps] 265. AMPS [WireSz] 300 CU AWG WIRE SIZE [Set] [4] 400 AL AWG WIRE SIZE Change to alum.
5060-UG-B-Composite (Cont’d) Steps Reset calculator Set free air mode Enter amps Find 1 wire size Find 2 wire size Find 3 wire size 4/4/03 Keystrokes 12:37 PM Display [Set] [x] [On/C] 0. [Set] [5] 3Ø 60 FrAir Cu 0. 500 [Amps] 500. AMPS [WireSz] 500 CU AWG WIRE SIZE 2 [ParSz] 000 CU PAR WIRE SIZE 3 [ParSz] 0 CU PAR WIRE SIZE NOTE: Parallel wire sizes smaller than 1/0 will be displayed as nonE.
5060-UG-B-Composite 4/4/03 12:37 PM Sizing Temperature-Adjusted Derated Wires A circuit was built with 90°C aluminum wire connecting a 47,650 volt-amp load to a 240 volt, single-phase source. Ambient temperature is 50°C. What is the derated wire size required if eight current-carrying THHN wires were installed in the raceway? Steps Keystrokes Reset calculator Set to 1-phase Set to 90°C Toggle to alum. Enter volt-amps Enter volts Set to 50°C amb Find adjst wire sz. [On/C] 0.
5060-UG-B-Composite 4/4/03 12:37 PM 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.
5060-UG-B-Composite 4/4/03 12:37 PM IMPORTANT NOTE ON VOLTAGE DROP CALCULATIONS The ElectriCalc Pro calculates voltage drop and wire size using DC resistance as defined by the 2002 NEC. To find the voltage drop for a specific wire size, you must first enter amps and the oneway wire length (and other required variables), entering the specific wire size last. Otherwise, for your safety the calculator will recalculate the wire sizes based on the ‘99 NEC Ampacity Tables and maximum allowable voltage drop.
5060-UG-B-Composite 4/4/03 12:37 PM Finding Three-Phase Voltage Drop A 20-amp three-phase load is being fed by a 230-volt source located 150 feet away. The installation specifications require 75°C #10 THW stranded copper conduc-tor. What is the voltage drop on this branch circuit? Steps Keystrokes Reset calculator Set to 75°C Enter amps Enter volts Enter length(feet) Enter VD wire size10 [Set] [x] [On/C] 0. [Set] [7] 3Ø 75 Cu 0. 20 [Amps] 20. AMPS 230 [Volts] 230. VOLT 150 [Length] 150.
5060-UG-B-Composite 4/4/03 12:37 PM Finding Voltage Drop Wire Size A 20-amp single-phase 208-volt load will be located 175 feet away from the source. Assuming a 3% allowable voltage drop, what is the size of 75°C conductor re-quired for this branch circuit? Steps Keystrokes Reset calculator Set to 75°C Set to 1-phase Enter amps Enter volts Enter distance Enter allow. VD% Find wire size [On/C] 0. [Set] [7] 3Ø 75 Cu 0. [Set] [1] 1 PH 20 [Amps] 20. AMPS 208 [Volts] 208. VOLT 175 [Length] 175.
5060-UG-B-Composite 4/4/03 12:37 PM Finding Voltage Drop Distance How far from a single-phase 240-volt source can you install a 15 amp load using 60°C #10 Al branch circuit conductors? Assume a 3% allowable voltage drop. Steps Keystrokes Reset calculator Set to 1-phase Set to aluminum Enter amps Enter volts Enter wire size [Set] [x] [On/C] 0. [Set] [1] 1 PH [Set] [4] 1Ø 60 Al 1 PH 15 [Amps] 15. AMPS 240 [Volts] 240. VOLT 10 [WireSz] 10 AL AWG WIRE SIZE 3 [VD%] 3.0 DROP V % [Length] 123.
5060-UG-B-Composite 4/4/03 12:37 PM Finding Voltage Drop Resistance What is the resistance of 85 feet of #2 90°C copper conductor? Steps Keystrokes Display Reset calculator [Set] [x] [On/C] 0. Set to 90°C mode [Set] [9] 3Ø 90 Cu 0. Enter wire size 2 [WireSz] 2 CU AWG WIRE SIZE Find resistance [Set] [Length] 0.2033993 OHMS WIRE Find 85 ft resist* [÷] 1000 [x] 85 [=] 0.0172889 *NOTE: Given resistance per 1000 feet, divide by 1000 to get a per foot resistance, then multiply by 85.
60-UG-B-Composite 4/4/03 12:37 PM 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 serviceentrance conductor being used.
5060-UG-B-Composite 4/4/03 12:37 PM Equip. Grounding Conductor Wire Size The [Set] [Grnd] keystroke can be used to find the grounding conductor size for raceways and “over-current devices in circuit ahead” equipment. The calculator uses the displayed amperage value to solve for the equipment grounding conductor based on NEC Table 250-122. Find the equipment grounding conductor size required when the circuitbreaker is rated at 45 amps and 90° copper is being used in the installation.
5060-UG-B-Composite 4/4/03 12:37 PM Fuse and Circuit Breaker Size What is the computed dual element and single element fuse size for a 230 volt, 3-phase, 50 HP induction motor? What are the Instantaneous Trip and Inverse Time Circuit Breaker requirements? Steps Keystrokes Reset calculator Enter volts Enter hp Find full current Find DE fuse size [On/C] 230 [Volts] 50 [HPmotor] [Amps] [DEFuse] Display 0. 230. VOLT 50. HP IND 130. FLC A 227.5 dE AMPS Display % used [DEFuse] 175.
5060-UG-B-Composite 4/4/03 12:37 PM Starter Size What NEMA size starter is required for a 575 volt, 3Ø, 20 HP induction motor? Steps Keystrokes Reset calculator Enter volts Enter hp Solve for starter size [On/C] 575 [Volts] 20 [HPmotor] Display 0. 575. VOLT 20. HP IND [Set] [HPmotor] 2 STAR SIZE Overload Protection Size 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.
5060-UG-B-Composite 4/4/03 12:37 PM Conduit Size The ElectriCalc Pro can calculate the size of conduit required when running single or multiple wires using the [CondSz] key and the calculator’s internal tables. The calculator uses NEC values for area of THW, THHN, and XHHW wires. When using the actual wire areas (and following the guidelines in NEC Chapter 9, Tables 1, 3, 4 and 5), the calculator can calculate a conduit size based on the conduit type and the same or different wire types and sizes.
5060-UG-B-Composite 4/4/03 12:37 PM Finding Motor Branch-Circuit Wire Size & Conduit Size — Same Wire Type & Size What size THHN copper wire & RMC conduit are needed to connect a 10 HP 1Ø induction motor to a 115 volt source? Steps Keystrokes Reset calculator Set to 1-phase Enter volts Enter horsepower Enter cond. type [Set] [x] [On/C] 0. [Set] 1 1 PH 115 [Volts] 115. VOLT 10 [HPmotor] 10. HP IND 8 [Set] [CondSz] nonE RMC Display Display full load amps Find wire size [Amps] 100.
5060-UG-B-Composite 4/4/03 12:37 PM 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. Finding Conduit Sizes for Multiple Conductors — Same Wire Type & Size Find the minimum IMC conduit size for eleven #6 THHN copper wires. Steps Keystrokes Clear calculator Enter cond.
5060-UG-B-Composite 4/4/03 12:37 PM 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” EMT conduit. How many XHHW wires? How many THW wires? Steps Keystrokes Display Clear calculator Enter cond. type [On/C] [On/C] 0. 1 [Set] [CondSz] EMT nonE COND Enter wire size 10 [WireSz] 10 CU AWG WIRE SIZE Enter conduit size 3 [CondSz] 3.00 in EMT COND SIZE Find max THHN # [#THHN] 167.
5060-UG-B-Composite 4/4/03 12:37 PM sectional area of wires, conduit size and actual fill area? (Use [THHN] for THWN; the cross-sectional areas are the same.) Steps Keystrokes Clear calculator Set to 75° Enter cond. type [On/C] [On/C] 0. [Set] [7] 1Ø Cu 75 0. 3 [Set] [CondSz] nonE FMC COND 0 [WireSz] 0 CU AWG WIRE SIZE 3 [#THHN] 3. THHN WIRES Enter 1st wire sz Enter #, type wire Find cross-sect. wire area [#THHN] Display 0.
5060-UG-B-Composite 4/4/03 12:37 PM Error Codes The error codes for the ElectriCalc Pro are listed below (Note: To clear an error, simply press any key): Error Description 1 Display register overflow (Answer too large to fit display) 2 Invalid or out-of-scale entry 3 PF or EFF calculated above 100% 4 Conduit Size beyond limits of table 5 Unable to calculate VDWire Size (Amps/Length too high) 8 Invalid HP entry per NEC table 9 Entered or calculated more than 15 different wires sizes 11 Temper
5060-UG-B-Composite 4/4/03 12:37 PM 2002 NEC References 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 Table 430-150 Table 430-152 Appendix C Updating Future Code Revisions This model is updateable for future NEC Editions. For information on 2005 and 2008 Codes, contact the dealer where this calculator was purchased or you may contact Calculated Industries, Inc. in the fall of the year prior.
5060-UG-B-Composite 4/4/03 12:37 PM Settings Permanent Values/Settings Values and settings maintained in permanent memory can only be changed (1) by pressing [Set] [x] (resets calculator to default settings), or (2) by changing each one or all of these settings.
5060-UG-B-Composite 4/4/03 12:37 PM Warranty Warranty Repair Service – U.S.A. Calculated Industries, Inc. (“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 unit) the product at no charge.
5060-UG-B-Composite 4/4/03 12:37 PM Please provide an explanation of the service requirement, your name, address, day phone number and dated proof of purchase (typically a sales receipt). If the product is over 90 days old, include payment of $6.95 for return shipping and handling within the contiguous 48 states. (Outside the contiguous 48 states, please call CI for return shipping costs.
5060-UG-B-Composite 4/4/03 12:37 PM Repair Service – Outside the U.S.A. Not all countries have CI Authorized Service Providers or the same warranty and service policies. To obtain warranty or non-warranty repair service for goods purchased outside the U.S., contact the dealer through which you initially purchased the product. If you cannot reasonably have the product repaired in your area, you may contact CI to obtain current product repair information and charges, including freight and duties.
5060-UG-B-Composite 4/4/03 12:37 PM INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY 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 employee is authorized to make any modification, extension, or addition to this warranty.
5060-UG-B-Composite 4/4/03 12:37 PM Legal Notices Software copyrighted and licensed to Calculated Industries, Inc. by Specialty Calculator Technologies, LLC, 2002. User’s Guide is copyrighted by Calculated Industries, Inc., 2002. ElectriCalc and Calculated Industries are registered trademarks of Calculated Industries, Inc. ALL RIGHTS RESERVED Calculated Industries, Inc. 4840 Hytech Drive Carson City, NV 89706 U.S.A 775/885-4975 o Fax: 775/885-4949 E-mail: techsup@calculated.com http://www.calculated.
5060-UG-B-Composite 4/4/03 12:37 PM Page 67
5060-UG-B-Composite 4/4/03 Printed in China 5060-UG-B • 2/02 12:37 PM Page 68
