Calculated Industries 5065 ElectriCalc Pro User's Guide

E

LECTRI

C

ALC

COMPLIANT NEC ®

®

P

RO

UPDATEABLE ELECTRICAL CODE CALCULATOR

Model 5065

User’s Guide

Introducing the

ElectriCalc

®

Now NEC

®

-Updateable!

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 2005 (and 2002, 1999,

1996) and future National Electrical

Codes, allowing you to solve Code-related problems quickly and accurately. The most common NEC tables are now at your fingertips!

An important 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 solves for the following:

• Kirchhoff’s Law

• Ohm’s Law

• Volts, Amps, Volt-Amps, Watts, kVA, kW, PF%, EFF%, and Resistance

• Copper or Aluminum Wire Sizes

• Parallel and Derated Wire Sizes

• Voltage Drop Wire Sizes, % and

Actual Voltage Drops, Voltage

Drop Distances and Wire Resistances

• Kilowatt hours and BTU’s

• Parallel Resistance

• Grounding Conductors Sizes

• Motor Full-Load Amps

• Overload Protection Sizes

• NEMA Starter Sizes

• Conduit Sizes

• And much more!

Table of Contents

Key Definitions . . . . . . . . . . . . . . . . . . . .1

Preference Settings . . . . . . . . . . . . . . . .21

Default Settings . . . . . . . . . . . . . . . . . .22

Basic Math Operations . . . . . . . . . . . . . .23

Percent Calculations . . . . . . . . . . . . . . .23

Memory Operations . . . . . . . . . . . . . . . .24

Kirchhoff’s Law . . . . . . . . . . . . . . . . . . .26

Ohm’s Law . . . . . . . . . . . . . . . . . . . . . .29

Motor Horsepower . . . . . . . . . . . . . . . .31

Ampacity Wire 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

Converting KW-HR and BTU . . . . . . . . . .56

Parallel Resistance . . . . . . . . . . . . . . . .57

Error Codes . . . . . . . . . . . . . . . . . . . . .58

Battery Information . . . . . . . . . . . . . . . .58

2005 NEC References . . . . . . . . . . . . . .59

Updating Future Code Revisions . . . . . . .60

Settings . . . . . . . . . . . . . . . . . . . . . . . .60

Repair and Return . . . . . . . . . . . . . . . . .61

Warranty . . . . . . . . . . . . . . . . . . . . . . .62

FCC Class B . . . . . . . . . . . . . . . . . . . . .65

Legal Notices . . . . . . . . . . . . . . . . . . . .65

Your ElectriCalc Pro is now updateable for future National Electrical Code ® editions that are updated every three

(3) years. 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 form of a chip that contains 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 battery (located back of calculator, top of unit) by sliding battery door out with your thumbnail. Set aside.

c) Using a screwdriver, pop out the square tab located in the middle section on the back of your calculator.

d) Replace it with the new update tab by inserting it into the slot. e) Replace the battery door. f) Turn calculator on. Your calculator is now updated and ready to use.

Key Definitions

Standard Calculator Functions

o — On/Clear

Turns on power. Pressing once clears the last entry and the display. Pressing twice clears all non-permanent values.

O — Off

Turns all power off. Clears the Memory and most internal registers.

+ - x Ö =

Arithmetic 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

Used to delete entries one keystroke at a time (unlike the o function, which deletes the entire entry).

S — Second Function

Used with other keys to access secondary functions.

s — Store

Used with function keys to store values.

Displays: STOR

User’s Guide — 1

r — Recall

Recalls a value stored in a register (e.g., to recall voltage drop % press r v ).

Displays: RCL

S +

— Pi (

π

)

Constant = 3.1415927

S - — Change Sign (+/–)

Toggles the sign of the displayed value from positive to negative or from negative to positive.

S % — x 2

Squares the displayed 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 cumulative

Memory (e.g., 1 0 s 0 , 5 S , s 0 , r 0 = 5). Clears when the calculator is shut off. r 0 — Memory Recall

Displays the value saved in ( M+).

r r — Display/Clear Memory (M-R/C)

Displays and clears the value saved in

( M+).

S r — Clear Memory

Clears the value saved in ( M+) without changing displayed value.

2 — ElectriCalc Pro

s 1 9 — Memory Storage

When pressed after the s key, the 1 through 9 keys will store the displayed values into non-cumulative Memory.

r 1

-

9

Recall M1 – M9.

Mode Set-up Functions

S x — Clear All

Clears all values, including Memory.

Resets settings to default values, except preference settings which are retained.

S Ö — Preferences (Prefs)

Use to set default settings or modes

(see “Preference Settings”).

S 1 — Single-Phase (1Ø)

Sets calculator to single-phase mode.

Displays: 1Ø

S 3 — Three-Phase (3Ø)

Sets calculator to three-phase mode.

This is the default setting. Displays: 3Ø

S 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. Defaults to 30°C (86°F). Amb will display when the ambient temperature is other than

30°C (86°F). Displays: AMB°

(Cont’d)


(Cont’d)

NOTE: The temperature units can be displayed in Celsius (°C) or Fahrenheit

(°F) by using the preference function

S Ö .

S 4 — Copper/Aluminum (Cu/Al)

Used to toggle between copper (default) and aluminum 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 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 size calculations. Displays: FrAir

S 6 — 60°C Wire Insulation

Sets calculator to 60°C wire insulation type for wire size calculations. This is the default setting. Displays: 60

S 7

— 75°C Wire Insulation

Sets calculator to 75°C insulation type for wire size calculations. Displays: 75

S 9 — 90°C Wire Insulation

Sets calculator to 90°C insulation type for wire size calculations. Displays: 90


Electrical Functions

K — kilo-

This key is used with Watts, Amps,

Volts, and Volt-amps keys to identify

“kilo-” values.

S K

— milli-

This key sequence is used with Watts,

Amps, Volts, and Volt-amps keys to identify “milli-” values.

A — Amps

Enters or calculates Amps (using 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 calculates Volt-amps (using

Amps, Volts and Horsepower or Watts).

Displays: VA, KVA, or mVA

W — Watts

Enters or calculates Watts (using Amps,

Volts, and VA or Horsepower).

Displays: WATT, KW, or mW

S A

— DC Amps (Idc)

Enters or calculates DC Amps (using DC

Volts and Resistance). Displays: Idc


S U — DC Volts (Vdc)

Enters or calculates DC Volts (using DC

Amps and Resistance). Displays: Vdc

S V — DC Resistance (R)

Calculates and displays DC resistance in Ohms (using DC Volts and DC Amps).

Displays: R

S W — Power Factor (PF%)

Enters or calculates power factor percentage (based on Watts and VA). Defaults to 100%. Entered or calculated power factors greater than 100% will result in an error. Displays: PF%

H — 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

S H — Efficiency (Eff%)

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%

S ¥ — Kilowatt–Hours to BTU

(Kw-hr © Btu) Calculate BTU (British

Thermal Unit) based on an entered

Kilowatt-Hour value. Displays: KW-H


S = — BTU to Kilowatt–Hours

(Btu © Kw-hr) Calculate Kilowatt-Hours based on an entered BTU (British

Thermal Unit) value. Displays: BTU

S s

— Parallel Resistance

(Par Res) Calculate total resistance based on an entered series of resistance values. Displays: P-RS

Motor Horsepower Functions

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. Only HP motor and Voltage entries as defined by

NEC Tables 430-247, 430-248 and 430-

250 can be used to determine motor loads.

S 8 — Induction/Synchronous/DC

Motor Toggle (Ind/Sync/DC)

Toggles between induction, synchronous, and direct current motor types. Displays:

IND (induction - default), SYNC (synchronous) or DC (direct current).

h — Motor Horsepower

Enters or calculates motor Horsepower.

Displays: IND HP (induction – default),

SYNC HP (synchronous) or DC HP

(direct current).


Ampacity Tables

The ElectriCalc Pro uses NEC Table

310-16 (310-17 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); and 3) ambient temperature.

Standard AWG wire sizes and Circular

Mils are used by the ElectriCalc Pro.

Wire size entries less than or equal to

2000 are accepted as AWG wire sizes; entries greater than 2000 are accepted 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 wires are entered using the 0 key (e.g., 0, 00,

000 and 0000).

w

— Wire Size/Ampacity

Enters or calculates wire size based on ampacity and Voltage drop, if a Voltage drop length has been entered.

♦ 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. If not solving for Voltage drop wire size, then displays the maximum ampacity.

♦ Third Press

Displays the wire size in Circular Mils.

Displays: CMIL

♦ 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.

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 calculated Amps value. Displays: 125%

P — Parallel Size

Used to find the size of parallel conductors using amperage and an entered quantity of wires. Parallel wire size calculations 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

(Cont’d)


(Cont’d)

♦ Second Press

Displays the maximum adjusted ampacity of the calculated parallel wire size.

Displays: WIRE A

NOTE: No adjustments are made for deration.

S P — Derated Wire Size (D/R Size)

Used to calculate derated wire sizes and allowable ampacity based on the entered quantity of wires, NEC Table

310-16 and NEC Table 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 number of wires, for example, 4 S P

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 %

♦ Fourth Press

Displays the NEC table referenced for the calculation. Displays: NEC 310.15


Voltage Drop Solutions

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.

NOTE: Voltage drop solutions may vary slightly from actual AC circuit values as the calculator does not incorporate factors such as inductive reactance, skin effect, raceway 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 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 % l — Length

Enters or calculates the length of a run for Voltage drop calculation.

Displays: FEET or MET

NOTE: Units of length can be set to

Feet or Meters by use of the Preference function S Ö .


S l — Wire Resistance (Wire Res)

Displays the actual resistance per

1,000 feet of the wire size in w based on NEC Chapter 9, Table 8.

Displays: OHMS WIRE

Ground Function Keys

G — 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

♦ Second Press

Displays the aluminum grounding electrode conductor size.

Displays: GRND AL WIRE SIZE

♦ Third Press

Displays the Circular Mil area used to calculate the grounding electrode conductor size. Displays: CMIL WIRE


♦ Fourth Press


S G

— Equipment Ground (EqGrnd)

This function uses NEC Table 250-122 to calculate the minimum equipment grounding conductor size, given an entered amperage rating or setting 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

Displays the copper grounding conductor size for the entered Amp rating.

Displays: EQPG WIRE SIZE CU

♦ Second Press

Displays the aluminum grounding conductor size. Displays: EQPG WIRE SIZE AL

♦ Third Press



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 Full-

Load Current” multipliers listed in NEC

Table 430-52.

You can also calculate the full Voltage starter size for non-plugging and nonjogging duty motors based on phase,

Voltage, motor HP and NEMA table specifications.

If a parameter is missing or invalid, the calculator will display “nonE.”

S L — Motor Type (M-Type)

Based on NEC Table 430-52, this key 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

( S x ).

♦ 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

L will select and display the next motor type from this list: SQ-C non-B (Squirrel Cage, non-

Design B), SQ-C B (Squirrel Cage,

Design B), SYNC no codE (Synchronous), WND no codE (Wound Rotor).

D

— Dual Element Fuse

♦ 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 — Single Element Fuse

(SEFuse)

♦ First Press

Displays the minimum Amp rating based on Phase, motor type, and amperage.

Displays: AMPS SE

♦ Second Press

Displays the full-load current percent multiplier value used to determine fuse size. Subsequent presses repeat this cycle. Displays: %FLC


S I — Instantaneous

Trip Circuit Breaker (InsTrip)

♦ 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. Displays: %FLC

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 current percent multiplier value used to determine breaker size. Displays: %FLC

L

— 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 A registers) by 115% or the value you enter.


Conforms to NEC Section 430-32 (a)(1) value of 115% unless you enter another value. For example, entering 125 L would calculate overload protection based on 125% of the entered amperage.

Displays: AMPS ol

♦ Second Press

Displays the full-load current percent multiplier value used to determine the overload current protection size. Subsequent presses of L repeat the cycle. Displays: %FLC

S h — Starter Size (Starter)

Displays the starter size (from NEMA publication ICS 2-1988 Tables 2-327-1 and 2-327-2) based on the phase, Voltage, and motor Horsepower settings.

Displays: STAR SIZE

NOTE: Horsepower values not identified in NEMA tables will cause the calculator to round up to the next larger starter size in the table.


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”. Conduit sizes are entered using decimal equivalents (e.g., 1-1/2” is entered as 1.5, 3/4” is entered as .75, etc.).

, Å , · — 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.

Displays: TTL WIRES (calculated) or

WIRES (entered).

♦ Second Press

Shows total cross-sectional area for all entered wires. Displays: WIRE AREA

(entered) or TTL WIRE AREA (calculated).

♦ Third Press

Shows total cross-sectional area of all entered wires of the selected wire insulation. Displays: TTL WIRE AREA


C

— 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.

Displays: COND SIZE

NOTE: If a wire size has not been entered or calculated, or an invalid conduit size is entered, the calculator will display “nonE.”

♦ Second Press

Shows total number of wires in the conduit for calculated conduit size.

Shows the conduit internal area for an entered conduit. Displays: TTL WIRES

(calculated) or COND AREA (entered).

NOTE: Third through fifth presses display only for calculated conduit sizes.

♦ 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

(Cont’d)


(Cont’d)

♦ 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

S C — Conduit Type (Cond Type)

♦ First Press

Displays 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) P-A

12) P-EB

To select a specific conduit type, enter the corresponding number of the conduit and then press S C . If you press this keystroke without entering a number, the calculator will switch to the next conduit type on the list.


Preference Settings

Your calculator has the following Preference Settings that you can access and change at any time.

Access the Preference Settings by pressing S Ö . Then, to access each category, press the

Ö 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).

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 default settings, perform a full reset (press

O , hold down x , and press o ), or manually set them back using the keystrokes below.

The Preference Settings are (default settings shown first):

To Set 2005, 2002, 1999, or 1996 NEC code:

S Ö (1st press of Ö ) NEC 2005

+ NEC 1996

+

+

NEC 1999

NEC 2002


To Set Ambient Temp. to °C or °F:

Ö (2nd press of Ö )

+

AMB° 30 °C

AMB° 86 °F

To Set Length to Feet or Meter:

Ö (3rd press of Ö )

+

FEET 1.

MET 1.

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 by performing a Clear All ( S x ).

Ambient Temperature 30°C

Insulation Rating 60°C

Material

Phase

Copper (Cu)

3Ø

Volts

Efficiency

240 V

100%

Power Factor 100%

Voltage Drop Percent 3%

Wire Environment

(vs Free Air)

Raceway


Basic Math Operations

This calculator uses standard chaining logic, which simply means that you enter your first value, the operator ( + ,

-

, x

,

Ö

), the second value and then the equals sign = .

A.

3 + 2 = 5.

B.

3 2 = 1.

C.

3 x 2 = 6.

D.

3 Ö 2 = 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.

3 5 5 x 1 5 % 53.25

2 5 0 + 6 ¥ 5 %

266.25

2 5 - 5 %

1 0 0 Ö 5 0 %

23.75

200.

The Percent key also allows you to change percentages to decimals (e.g.,

2 5 % 0.25).


Memory Operations

Whenever the s 0 keys are pressed, the displayed value will be added to the

Memory. Other Memory functions:

FUNCTION KEYSTROKES

Add to Memory s 0

Subtract from Memory S - s 0

Recall total in Memory r 0

Display/Clear 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 r 0 will display the calculated average and total count of the accumulated values.

Using M+

KEYSTROKES DISPLAY

3 5 5 s 0

2 5 5 s 0

M+ 355.

M+ 255.

7 4 5 S - s 0 M+ – 745.

r 0 r 0 r 0 r r

TTL – 135.

AVG – 45.

CNT 3.

M

M

M

M

M

M

– 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 be used to permanently store single, noncumulative values. The following 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 ).

You can replace a value in one of these

Memory registers by storing a new value in place of the stored value.

FUNCTION

Store single value in M1

Clear M1

Recall M1

KEYSTROKES s 1

0 s 1 r 1

Examples:

Store 175 into M1, recall the value, and then clear the value.

KEYSTROKES

1 7 5 s 1

O o r 1

0 s 1

DISPLAY

M-1 175.

0.

M-1 175.

M-1 0.


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 singlephase load drawing 14,605 Volt-amps and 115 Amps.

Steps Keystrokes Display

Clear calculator o o

Set to 1-phase S 1

Enter VA 1 4 6 0 5 V

0.

1 PH

VA 14,605.

Enter Amps 1 1 5 A AMPS 115.

Solve for Volts U VOLT 127.

Finding Amps

What is the current (Amps) for a load drawing 8,250 Volt-Amps on a 240 Volt, three-phase circuit?



Set to 3-phase S 3

Enter VA

Enter Volts

Solve for Amps A

0.

3 PH

8 2 5 0 V VA 8,250.

2 4 0 U VOLT 240.

AMPS 19.846416


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?



Set to 1-phase S 1

Add VA loads: 7 8 0 0 +

1 5 1 0 0 +

Enter as VA

0.

1 PH

5 1 0 0 +

8 9 0 0 +

V

6 4 7 0 = 43,370.

VA 43,370.

Enter Volts 2 4 0 U VOLT 240.

Solve for Amps A AMPS 180.70833

Finding Amps from Kilowatts

What is the amperage for a 75 kW load connected in a 120/208 Volt, 3Ø circuit?



Set to 3-phase S 3

Solve for Amps A

0.

3 PH

Enter kilowatts 7 5 K W KW 75.


AMPS 208.17918


Finding Volt-Amps

What is the VA rating for a 120 Volt, 22

Amp, 1Ø circuit? What is the kVA rating?



Set to 1-phase S 1

Enter Volts

Enter Amps

0.

1 PH

1 2 0 U VOLT 120.

2 2 A AMPS 22.

Solve Volt-amps V

Solve for kVA K V

VA 2,640.

KVA 2.64

Finding kVA Rating

What is the kVA rating for a 120/208

Volt, three-phase, 65 Amp transformer?



Set to 3-phase S 3

Enter Volts

Enter Amps

0.

3 PH

2 0 8 U VOLT 208.

6 5 A AMPS 65.

Solve for kVA K V KVA 23.417327

Finding Wattage

A 120 Volt, single-phase, 45 Amp electrical motor has an 87% power factor.

What is its wattage?



Set to 1-phase S 1

0.

1 PH


Set power factor 8 7 S W PF% 87.

Enter Amps 4 5 A AMPS 45.

Solve for Watts W WATT 4,698.


Finding kW Rating

What’s the kW rating for a 90 Amp, 208

Volt, three-phase broiler with 100% power factor?



Set to 3-phase S 3

Set power factor 1 0 0 S W

Enter Amps

Enter Volts

Solve for kW

0.

3 PH

PF%100.

9 0 A AMPS 90.

2 0 8 U VOLT 208.

K W KW 32.423991

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.

Find the Voltage.



Enter current

0.

¥ 0 1 2 5 S A

Idc 0.0125

Enter resistance 4 8 0 S V

OHMS 480.

Find Voltage S U Vdc 6.

Finding Amps

An 120k electrical resistor is plugged into a 12 volt circuit. Find the current (in Amps).



Enter resistance 1 2 0 K S V

0.

Enter Voltage

Find current

KOHM 120.

1 2 S U Vdc 12.

S A Idc 0.0001

Finding Ohms

An electrical circuit operating at 240 Volts has a current of 14.6 Amperes. Find the total resistance (in Ohms) of the circuit.



Enter Voltage 2 4 0 S U

Enter current

0.

Vdc 240.

1 4 ¥ 6 S A

Idc 14.6

Find resistance S V OHMS 16.438356


Motor Horsepower

The ElectriCalc Pro can calculate the full load current (Amps) of a motor, based on phase, Voltage and motor

(synchronous, induction, or DC). 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).

The ElectriCalc Pro can also calculate an equivalent Horsepower for an induction, 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, 430-248 or 430-250 will cause the calculator to choose the next higher table value for motor Horsepower.

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?



Set to 1-phase S 1

Enter Volts

Enter HP

Find full load Amps A

0.

1 PH

2 3 0 U VOLT 230.

2 h IND 2. HP

FLC 12. A


Finding Motor Wire Size and

Ampacity

Find the wire size required to connect a continuous run, 3Ø, 3 HP induction motor into a 230V circuit.



Set to 3-phase S 3

Enter Volts

Enter HP

0.

3 PH

2 3 0 U VOLT 230.

3 h IND 3. HP

Find load current A

Find 125% A size S w

FLC 9.6 A

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

A synchronous motor is defined as having a 27 Amp load on a 240 Volt, 3Ø circuit.

What is its Horsepower?



Set to 3-phase S 3

Set to synch.

Enter Volts

0.

3 PH

S 8 SYNC 0.

2 4 0 U VOLT 240.

Enter Amps

Solve for HP

2 7 A AMPS 27. h SYNC 25. HP

Set to ind. motor S 8 S 8 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?


Clear calculator o o 0.

Set to DC motor S 8 S 8 DC 0.

Enter Volts

Enter Amps

1 8 0 U VOLT 180.

1 0 A AMPS 10.

Solve for HP h

Set to ind. motor S 8

DC 2. HP

IND 0.


Ampacity Wire Sizing

The required wire size of a service conductor can be determined based on the specified electrical requirements and the w key. The wire size is automatically recalculated whenever the wire insulation

(temperature) ratings or wire material (copper or aluminum) types are revised. Wire sizing is based on the requirements 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

60°C copper wire?



Set to 1-phase S 1

Enter kVA

Enter Volts

Find Amps

0.

1 PH

3 0 K V KVA 30.

2 4 0 U VOLT 240.

A

Find wire size w

AMPS 125.

AWG 0 CU

WIRE SIZE

Display Wire

Ampacity

Display CMIL w

0 125.0 Cu WIRE A w CMIL 105,600 WIRE

Display NEC Table w NEC 310.16


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?



Set to 3-phase

Set to 75°C

Enter Amps

S 3

S 7

260 A AMPS 260.

Find wire size w

0.

3 PH

3Ø 75 Cu 3 PH

AWG 300 CU

WIRE SIZE

Change to 90˚ S 9 AWG 0000 CU

Reset to 60˚

WIRE SIZE

S 6 o 3Ø 60 Cu 0.

and Clear

Wire Sizing Based on Ambient Temperature

Find the 90°C copper 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?



Set to 1-phase S 1

Set to 90°C

Enter VA

0.

1 PH

S 9 1Ø 90 Cu 1 PH

4 7 7 0 0 V

VA 47,700.

(Cont’d)


(Cont’d)


Enter Volts

Find Amps

2 4 0 U VOLT 240.

A AMPS 198.75

Find wire size w AWG 000 CU

WIRE SIZE

Change 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


Reset ambient temperature 3 0 S 2 AMB° 30.˚C

NOTE: See “Settings” on page 62 for a list of Permanent Values/settings.

Changing these settings may affect your calculations.


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?



Set to 3-phase S 3

Set to 75°C

Enter Amps

0.

3 PH

S 7 3Ø 75 Cu 3 PH

2 6 5 A

AMPS 265.


WIRE SIZE

Change to alum.

S 4 AWG 400 AL

WIRE SIZE

Display Wire w

400 270.0

Ampacity AI WIRE A

Display CMIL w CMIL 400,000 WIRE


Reset to copper S 4 o 3Ø 75 Cu 0.

and Clear

NOTE: See “Settings” on page 62 for a list of Permanent Values/settings.

Changing these settings may affect your calculations.


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 amb. temp.)? What size for 2 parallel conductors? For 3 conductors?



Set to 60°C S 6

Find 1 wire size w

0.

3Ø 60 Cu 0

Set free air mode S 5 3Ø 60 FrAir Cu 0.

Enter Amps 5 0 0 A AMPS 500.

AWG 500 CU

FrAir WIRE SIZE

Find 2 wire size 2 P PAR 000 CU

FrAir WIRE SIZE

Find 3 wire size 3 P PAR 0 CU

FrAir WIRE SIZE

Exit Free Air Mode S 5 o 3Ø 60 Cu 0.

and Clear

NOTE: Parallel wire sizes smaller than

1/0 will be displayed as nonE.

NOTE: See “Settings” for a list of

Permanent Values/settings. Changing these settings may affect your calculations.


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?



Set to 75°C S 7

Enter Amps

0.

3Ø 75 Cu 0.

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

WIRE A Ampacity

Display Adjustment P

Factor

Display NEC Table P

ADJ 70. %

NEC 310.15




Sizing Temperature-Adjusted

Derated Wires

A circuit was built with 60°C copper wire connecting a 47,650 Volt-amp load to a

240 Volt, three-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?



Set to 60°C S 6

0.

3Ø 60 Cu 0.

Enter Volt-amps 4 7 6 5 0 V

Enter Volts

VA 47,650.

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

Find derated

Amb WIRE SIZE

8 S P D/R 500 CU wire size

Display Wire P

Amb WIRE SIZE

D/R 46.5

Ampacity

Display Adjust.

P

Factor

Amb WIRE A

ADJ 41. %

Amb

Display NEC Table P

Set to 30°C

NEC 310.15

3 0 S 2 o 0.

and Clear

NOTE: All Settings should be changed back to default to avoid conflicts in answers throughout the rest of this manual. See “Settings” for a list of Permanent

Values/settings. Changing these settings may affect your calculations.


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. It will solve for the distance

( l ) once you have entered or calculated the phase, Volts, Amps, wire type, Voltage drop wire size, and allowable VD percentage. The ElectriCalc

Pro uses resistance values found in

NEC Table 8 Chapter 9 to determine

Voltage drop.

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 situations, the DC

Voltage Drop calculation is sufficient to meet safety standards.


IMPORTANT NOTE ON

VOLTAGE DROP CALCULATIONS

The ElectriCalc Pro calculates Voltage drop and wire size using DC resistance as defined by the 2005 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.

Otherwise, for your safety the calculator will recalculate the wire sizes based on the ‘99 NEC Ampacity 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 1Ø system. What is the source Voltage drop at the load?



Set to 1-phase S 1

Set to 75°C

0.

1 PH

S 7 1Ø 75 Cu 1 PH

1 1 A AMPS 11. Enter Amps


Enter Length 1 7 5 l FEET 175.

Enter wire size* 8 w AWG 8 CU

WIRE SIZE

Solve volt. drop v

Solve % v.drop

v

DROP 3.0 V

DROP 1.4 V %

* Wire size can also be entered in Circular

Mils (e.g., 1 6 5 1 0 w enters

16,510 CMILs and displays 8 AWG wire size).



Permanent Values/settings. Changing these settings may affect your calcula tions.

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 conductor. What is the Voltage drop on this branch circuit?



Set to 75°C S 7

Set to 3-phase S 3

Enter Amps

Enter Volts

0.

3Ø 75 Cu 0.

3Ø 75 Cu 3 PH

2 0 A AMPS 20.

2 3 0 U VOLT 230.

Enter Length(feet) 1 5 0 l FEET 150.

Find VD wire size w AWG 10 CU

VD WIRE SIZE

Solve volt. drop v

Solve % v.drop

v

DROP 6.4 V

DROP 2.8 V %




Finding Voltage Drop Wire Size

A 20 Amp, three-phase 208 Volt load will be located 175 Feet away from the drop, what is the size of 75°C conductor required for this branch circuit?

Steps Keystrokes

Find actual

Voltage drop v

Find % v.drop

v

Display


Set to 75°C S 7

0.

3Ø 75 Cu 0.

Enter Amps

Enter Volts

2 0 A AMPS 20.

2 0 8 U VOLT 208.

Enter distance 1 7 5 l FEET 175.

Enter allow. VD% 3 v DROP 3.0 V %


VD WIRE SIZE

DROP 4.7 V

DROP 2.3 V %




Finding Voltage Drop Distance

How far from a three-phase 240 Volt source can you install a 15 Amp load using 60°C #10 copper branch circuit conductors? Assume a 3% allowable

Voltage drop.



Set to 60°C S 6

0.

3Ø 60 Cu 0.

Enter Amps

Enter Volts

1 5 A AMPS 15.

2 4 0 U VOLT 240.

Enter wire size* 1 0 w AWG 10 Cu

Enter 3% VD

Find distance

WIRE SIZE

3 v DROP 3.0 V % l FEET 234.86987

Find actual

Voltage drop v

Find % v.drop

v

DROP 7.2 V

DROP 3.0 V %




NOTE: The calculator automatically makes adjustments for resistance using

NEC Chapter 9, Table 8, if the insulation type is other than 75°C.

See “Settings” for a list of Permanent

Values/settings. Changing these settings may affect your calculations.


Finding Voltage Drop Resistance

What is the resistance of 85 Feet of #2

90°C copper conductor?



Set to 90°C S 9

Enter wire size* 2 w

0.

3Ø 90 Cu 0.

AWG 2 CU

WIRE SIZE

Find resistance S lOHMS 0.2033993

WIRE

Find 85 ft resist** Ö 1 0 0 0 x

8 5 = 0.0172889




**Given resistance per 1000 Feet, divide by 1000 to get a per Foot resistance, then multiply by 85.



Finding DC Resistance

What is the equivalent resistance of a 12

Volt DC circuit pulling 5 Amps?



Enter Voltage

0.

1 2 S U Vdc 12.

Enter Amps 5 S A

Find resistance S V

Idc 5.

OHMS 2.4


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. What is the equivalent aluminum size? What is the equivalent Circular Mils?



Set to 3-phase

Set to 75º C

S 3

S 7

0.

3 PH

3Ø 75 Cu 3 PH

Enter wire size* 0 0 w AWG 00 CU

WIRE SIZE

Find ground wire G GRND 4 CU size

Find aluminum size G

WIRE SIZE

GRND 2 AL

WIRE SIZE

Find Circular Mils G CMIL 133,100.

WIRE

Display NEC Table G NEC 250.66


Mils (e.g., 1 3 3 1 0 0 w enters



Equipment Grounding

Conductor Wire Size

The S G 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.

What is the equivalent aluminum size?



Set to 90º C S 9

0.

3Ø 90 Cu 0.

Enter Amp rating 4 5 A AMPS 45.

Find equipment ground wire size S G EQPG 10 CU

WIRE SIZE

Find aluminum size G EQPG 8 AL

WIRE SIZE

Display NEC Table G NEC 250.122

Reset to 60˚C S 6 o 3Ø 60 Cu 0.

and Clear


Fuse and Circuit Breaker Size

What is the calculated 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?



Set to 3-phase

Enter Volts

Enter HP

S 3

0.

3 PH

2 3 0 U VOLT 230.

5 0 h IND 50. HP

Find full current A FLC 130. A

Find DE fuse size D

Display % used D

AMPS 227.5 dE

%FLC 175.

Find SE fuse size S D AMPS 390. SE

Display % used D

Find inv. time brkr I

Display % used I

%FLC 300.

AMPS 325. b2

%FLC 250.

Find ins. trip breaker size S I AMPS 1,040. b1

Display % used I %FLC 800.

Starter Size

What NEMA size starter is required for a 575 volt, 3Ø, 20 HP induction motor?



Set to 3-phase

Enter Volts

Enter HP

S 3

0.

3 PH

5 7 5 U VOLT 575.

2 0 h IND 20. HP

Solve for starter size S h STAR 2 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 1.0 service factor? What is the required overload rating at 125% (for a 1.15 service factor)?



Set to 3-phase S 3

0.

3 PH


Enter Horsepower 1 5 h IND 15. HP

Enter nameplate current 1 9 ¥ 2 A

AMPS 19.2

Find overload size L

Display % used L

AMPS 22.08 ol

%FLC 115.

Find 125% load 1 2 5 L AMPS 24. ol

Display % used L %FLC 125.

Reset overload rating and clear 1 1 5 L o 0.


Conduit Size

The ElectriCalc Pro can calculate the size of conduit required when running single or multiple wires using the C key and the calculator’s internal tables. The calculator uses NEC values for area of THW/THHW,

XHH/XHHW, and THHN/THWN 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.

To select a specific conduit type, enter the corresponding number of the conduit and then press S C . The numbers and types are:

1) EMT 2) ENT 3) FMC 4) IMC

5) LFNB 6) LFNA 7) LFMC 8) RMC

9) P-80 10) P-40 11) P-A 12) P-EB

When you enter a new conduit type or scroll through the types, you will see the updated conduit size (if you have entered the wire type and quantity).


Finding Motor Branch-Circuit

Wire Size and Conduit Size —

Same Wire Type & Size

What size THHN copper wire and RMC conduit are needed to connect a 10 HP

1Ø induction motor to a 115 Volt source?



Set to 1-phase S 1

Set to 60º C

Enter Volts

0.

1 PH

S 6 1Ø 60 Cu 1 PH

1 1 5 U VOLT 115.

Enter Horsepower 1 0 h IND 10. HP

Enter cond. type 8 S C RMC nonE

Display full load

Amps A

Find wire size S w

FLC 100. A

AWG 0 CU

WIRE SIZE 125%

Find wire ampacity w 0 125.0*

WIRE A125%

Find conduit size C RMC 1.25 in

COND SIZE

Find total # wires C

Find conduit fill % C

2. TTL WIRES

FILL 24.3

COND %

Find act. fill area C FILL 0.3710

TTL WIRE AREA

Find rem. area C REM 0.1021

WIRE AREA

Set to 3-phase S 3 o 3Ø 60 Cu 0.

and Clear


* 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.

Display will also show wire size in upper left when displaying maximum ampacity rating.



Finding Conduit Sizes for Multiple

Conductors — Same Wire Type and Size

Find the minimum IMC conduit size for eleven #6 THHN copper wires.



Enter cond. type 4 S C IMC nonE

Enter wire size* 6 w AWG 6 CU

Enter # THHN

WIRE SIZE

1 1 · THHN 11.

WIRES

Find conduit size C IMC 1.25 in

COND 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?



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

Find max THHN # · THHN 167.

TTL WIRES

Find max XHHW# Å XHHW 145.

TTL WIRES

Find max THW # THW 145.

TTL WIRES





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 crosssectional area of wires, conduit size and actual fill area? (Note: The crosssectional areas are the same for both

THHN and THWN; display will show as

THHN.)



Set to 75° S 7

0.

3Ø Cu 75 0.

Enter cond. type 3 S C FMC nonE

COND

Enter 1st wire sz* 0 w AWG 0 CU

WIRE SIZE

Enter #, type wire 3 · THHN 3.

WIRES

Find cross-section wire area · THHN 0.5565

Enter 2nd wire sz* 2 w

WIRE AREA

AWG 2 CU

WIRE SIZE

Enter #, type wire 1 Å XHHW 1.

WIRE

Find cross-sect.

Å XHHW 0.1146

WIRE AREA

Find conduit size C FMC 1.50 in

COND SIZE

(Cont’d)


(Cont’d)


Find total # wires C

Find conduit fill %

Find actual fill area

Find remaining area

C

C

C

Display

4.

TTL WIRES

FILL 36.1

COND %

FILL 0.6711

TTL WIRE AREA

REM 0.0717

WIRE AREA


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).



Converting KW-HR and BTU

Find the equivalent BTU rating of a 3.5

kw-hr rated furnace.



Enter Kilowatt 3 ¥ 5

0.

3.5

Hours

Find Equivalent S ¥ BTU 11,953.552

BTU


What is the kw-hr rating for a 4,500 BTU heater?



Enter BTU 4 5 0 0

Rating

Find Equivalent S =

Kilowatt Hours

Display

0.

4,500.

KW-H 1.3176

Parallel Resistance

Find the equivalent resistane for 10

Ohm, 20 Ohm, and 50 Ohm resistors placed in parallel.



Enter 1

Enter 2 st nd Resistor 2 0 S s

0.

Resistor 1 0 S s P-RS 10.

Enter 3 rd

P-RS 6.6666667

Resistor 5 0 S s

P-RS 5.8823529

NOTE: The total is recalculated with each additional resistor value entered.


Error Codes

The error codes for the ElectriCalc Pro are listed below (Note: To clear an error, perform a Clear All S x ):

DISPLAY

OFLO

ERROR DESCRIPTION

Answer too large to display

ENT Error Invalid or out-of-scale entry

POWR Error PF or EFF calculated above 100% nonE Conduit Size beyond limits of table

Unable to calculate Voltage Drop wire Size (Amps/Length too high)

Temperature setting out of range for wire calculation.

Invalid HP entry per NEC table HP Error

FULL Error Entered or calculated more than

15 different wires sizes

EROM Error Bad EROM

MATH Error Math error (i.e., divide by zero)

Battery Information

The calculator is powered by a single

3-Volt Lithium CR-2032 battery. This should last upwards of 800 hours of actual use (One year plus for most people). If the display becomes very dim or erratic, replace the battery.

NOTE: Please use caution when disposing of your old batteries as they contain hazardous chemicals.


Battery Replacement Instructions:

1) Hold calculator upright with back of calculator toward you.

2) Lift battery holder out from the top of the calculator.

3) Remove the old battery.

4) Place new battery with positive side against the bottom of the holder.

5) Insert holder into calculator with positive side of battery facing back of calculator.

2005 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

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

2005. Previous code years may have different table references.


Updating Future Code

Revisions

This model is updateable for future

NEC Editions. For information on future codes, contact the dealer where this calculator was purchased or you may contact Calculated Industries, Inc. in the fall of the year prior.

Settings

Permanent Values/Settings

Values and settings maintained in permanent Memory can only be changed

(1) by pressing

S x

(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

(2) Phase setting (1Ø/3Ø)

(3) The entered values for Volts, Voltage Drop %, Power Factor % and

Efficiency %

(4) Ambient Temperature setting

Semi-Permanent Values

The following semi-permanent values are cleared to default settings when the calculator is shut-off:

(1) Cumulative Memory (M+)

(2) Free Air mode


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 will not 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 call a

Calculated Industries’ representative between the hours of 7:00am and 4:00pm Pacific Time for additional information and a Return

Merchandise Authorization (RMA).

Call Toll Free: 1-800-854-8075

Outside USA: 1-775-885-4900 www.calculated.com/warranty


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.

THE WARRANTY WILL NOT APPLY TO

THE PRODUCT IF IT HAS BEEN DAM-

AGED BY MISUSE, ALTERATION, ACCI-

DENT, IMPROPER HANDLING OR OPERA-

TION, OR IF UNAUTHORIZED REPAIRS

ARE ATTEMPTED OR MADE. SOME

EXAMPLES OF DAMAGES NOT COVERED

BY WARRANTY INCLUDE, BUT ARE NOT

LIMITED TO, BATTERY LEAKAGE, BEND-

ING, A BLACK “INK SPOT” OR VISIBLE

CRACKING 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 warranty of the original product or 90 days, whichever is longer.


Non-Warranty Repair Service

– U.S.A.

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.

Repair Service –

Outside U.S.A.

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.


Disclaimer

CI MAKES NO WARRANTY OR REPRESEN-

TATION, EITHER EXPRESS OR IMPLIED,

WITH RESPECT TO THE PRODUCT’S

QUALITY, PERFORMANCE, MER-

CHANTABILITY, OR FITNESS FOR A PAR-

TICULAR PURPOSE. AS A RESULT, THIS

PRODUCT, INCLUDING BUT NOT LIMITED

TO, KEYSTROKE PROCEDURES, MATHE-

MATICAL ACCURACY AND PREPRO-

GRAMMED MATERIAL, IS SOLD “AS IS,”

AND YOU THE PURCHASER ASSUME THE

ENTIRE RISK AS TO ITS QUALITY AND

PERFORMANCE. IN NO EVENT WILL CI BE

LIABLE FOR 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 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.

Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific rights, and you may also have other rights, which vary from state to state.


FCC Class B

This equipment has been certified to comply with the limits for a Class B calculating device, pursuant to Subpart J of

Part 15 of FCC rules.

Legal Notices

Software copyrighted and licensed to Calculated Industries by

Specialty Calculator Technologies,

LLC, 2006.

User’s Guide copyrighted by Calculated

Industries, Inc., 2006.

ElectriCalc® and

Calculated Industries® are registered trademarks of

Calculated Industries, Inc .

4840 Hytech Drive

Carson City, NV 89706 U.S.A.

1-800-854-8075 • Fax: 1-775-885-4949

E-mail: [email protected]

www.calculated.com

ALL RIGHTS RESERVED

Designed in the U.S.A.


Printed in China

04/06

UGL5065E-A

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