Calculated Industries 5070 Reference Guide 44 Pages
Calculated Industries 5070 Reference Guide
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ELECTRICALC ® PRO
The ElectriCalc ® Pro is an invaluable calculator for today’s busy electrical professional. It has intuitively labeled
“electrical keys” and conforms to 1996 through 2011 and future National
Electrical Codes. The most common
NEC tables are now at your fingertips!
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The ElectriCalc ® Pro instantly solves for:
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Volts, Amps, Volt-Amps,
Watts, PF%, and EFF%
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Cu and Al Wire Sizes
Parallel and Derated Wire
Sizes
•
Voltage Drop Wire Sizes, and
Lengths
Kilowatt hours and BTU’s
Parallel Resistance
Grounding Conductors
Motor FLC
Fuse/Breaker Sizes
Conduit Sizes
And much more!
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Table of ConTenTs
GETTING STARTED .......................... 4
KEY DEFINITIONS ..................................4
Basic Function Keys .............................4
Mode Set-up Keys .................................6
Electrical Keys .......................................6
Motor Keys .............................................8
Wire Sizing Keys ....................................8
Voltage Drop Keys .................................9
Grounding Conductor Keys ..................10
Fuse/Breaker Keys ..............................10
Conduit Sizing Keys ............................. 11
PREFERENCE SETTINGS ....................13
BASIC MATH OPERATIONS ............. 14
PERCENT CALCULATIONS .............. 14
MEMORY OPERATIONS .......................14
Using M+ ..............................................15
Using Memory Storage Keys
(M1- M9) ..............................................15
uSING ThE electricalc pro ...... 15
KIRCHHOFF’S LAW ..............................15
Finding Voltage ....................................16
Finding Amps .......................................16
Finding Volt-Amps ................................17
Finding kW Rating ...............................17
OHM’S LAW ...........................................18
Finding Volts ........................................18
Finding Amps .......................................18
Finding Resistance (Ohms) .................19
MOTOR FUNCTIONS ............................20
Finding Full-Load Current ....................20
Finding Motor Wire Size ......................20
AMPACITY WIRE SIZING ......................21
Wire Sizing ...........................................21
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Wire Sizing Based on Material Type.......22
Sizing Parallel Conductors ...................23
Finding Derated Wire Size ...................24
VOLTAGE DROP ...................................25
Finding Voltage Drop ...........................25
Finding Voltage Drop Wire Size ...........26
Finding Voltage Drop Distance ............27
Finding Voltage Drop Resistance .........28
GROUND CONDUCTOR
WIRE SIZE .............................................29
EQUIPMENT GROUNDING
COUNDUCTOR WIRE SIZE ..................29
FUSE AND CIRCUIT
BREAKER SIZE .....................................30
STARTER SIZE ......................................31
OVERLOAD PROTECTION SIZE ..........31
CONDUIT SIZE ......................................32
Finding Motor Branch-Circuit Wire Size and Conduit Size —
Same Wire Type and Size ...................33
Finding Conduit Size —
Multiple Conductors, Different Wire Sizes
and Types ............................................34
CONVERTING KILOWATT-HOUR
AND BTU ...............................................35
PARALLEL RESISTANCE ......................36
APPENDIX A —
DeFaUlt SettiNGS .......................... 37
APPENDIX B —
care iNStrUctioNS ....................... 38
APPENDIX C — accUracY/errorS, aUto
SHUt-oFF, BatterieS, reSet ........ 39
REPAIR AND RETuRN ........................ 42
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GETTING STARTED
KeY DefInITIons
Basic Function Keys
on/clear Key — Turns on power, clears the last entry and clears all temporary values.
and
off — Turns all power off.
Arithmetic operation keys.
Keys used for entering numbers.
Second Function —
Used to access secondary functions.
-
Store — Stores values.
Storage registers —
Store values in Memory.
recall — Used to recall stored values and settings.
Memory clear — Clears
M+ and displays total.
M+ — Adds value to
Accumulative Memory.
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Memory recall —
Displays the value saved in M+.
Memory clear (M-r/c)
— Clears M+ without changing current display.
percentage — Standard
% function.
x 2 — Squares the value on the display.
Backspace Function
— Used to delete entries one keystroke at a time.
!
— Calculates the
Square Root of the displayed value.
1/x — Finds the
Reciprocal of a number.
clear all — Reset all settings, other than preferences to default.
+/– — Toggles sign of value.
pi — Displays value of
(3.1415927).
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Mode Set-up Keys
prefs — Use to define calculator modes.
1Ø — Sets calculator to
Single-Phase mode.
3Ø — Sets calculator to
Three-Phase mode.
amb° — Enters ambient temperature for finding
Wire Sizes.
copper/aluminum
(cu/al) — Toggles between Copper and
Aluminum Wire.
Free air (Frair) — Sets calculator to Free Air mode.
60°c Wire insulation —
Sets to 60°C Wire.
75°c Wire insulation —
Sets to 75°C Wire.
90°c Wire insulation —
Sets to 90°C Wire.
Electrical Keys
kilo- — Used to identify
“kilo-” values.
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milli- — Used to identify
“milli-” values.
amps — Enters or calculates Amps.
Volts — Enters or calculates Volts.
Volt-amps — Enters or calculates Volt-Amps.
Watts — Enters or calculates Watts.
Dc amps (idc) — Enters or calculates DC Amps.
Dc Volts (Vdc) — Enters or calculates DC Volts.
Dc resistance (r) —
Enters or calculates DC
Resistance in Ohms.
power Factor (pF%)
— Enters or calculates
Power Factor.
theoretical Horsepower
— Enters or calculates
Theoretical Horsepower.
Efficiency (Eff %) —
Enters or calculates the
Power Efficiencies.
(cont’d)
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(cont’d)
Kw-hr
► Btu —
Converts Kw-hr to Btu.
BtU to Kilowatt–Hours
(Btu
► Kw-hr) —
Converts Btu to Kw-hr.
parallel resistance
(par res) — Calculates total Resistance of
Parallel Resistors.
Motor Keys
ind/Sync/Dc — Toggles between Motor Types.
Motor Horsepower —
Enters or calculates
Motor Horsepower.
Starter Size (Starter) —
Displays the Starter Size.
Wire Sizing Keys
Wire Size/Ampacity —
Enters or calculates Wire
Size. Additional presses show smaller wire size
(if Length defined),
Ampacity, Circular Mils, and referenced table.
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125% ampacity — Used to calculate Wire Size using 125% of Amps.
Also shows Ampacity,
Circular Mils and NEC table reference with repeated presses.
parallel Size — Provides
Wire Sizes using Parallel
Conductors. A second press displays the
Ampacity.
Derated Wire Size (D/r
Size) — Calculates
Derated Wire Sizes given a number of wires in the raceway. Also shows
Adjusted Ampacity,
Deration Factor and NEC table reference.
Voltage Drop Keys
percent Voltage Drop
— Toggles between
Actual Voltage Drop and
Percent Voltage Drop with repeated presses.
length — Enters or calculates the Length used for Voltage Drop.
(cont’d)
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(cont’d)
Wire resistance
(Wire res) — Displays the Wire Resistance per
1,000 Feet.
Grounding Conductor Keys
Ground — Displays the
Copper and Aluminum grounding electrode sizes given an entered Wire
Size. Also shows Wire
Circular Mils and NEC reference with additional key presses.
equipment Ground
(eqGrnd) — Provides the Copper Equipment
Ground size given an entered Wire Size.
Additional key presses show Aluminum Ground
Size and the NEC reference.
Fuse/Breaker Keys
overload protection
— Enters a percent
Overload Factor and shows the Overload required based on stored
Amps. The percent multiplier is shown on the second key press.
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Motor type (M-type)
— Displays the current
Motor Type for use with
Breaker/Fuse sizing.
Additional presses toggle between Motor Types.
Dual element Fuse
Single element Fuse
(SeFuse)
inverse time Breaker
instantaneous trip circuit Breaker (instrip)
— Displays the minimum
Amp rating and percent multipier.
Conduit Sizing Keys
,
,
Number of Wires —
Used to enter or calculate the Number of Wires in a raceway and calculate
Wire Area. Also shows total Number of Wires and the total area of all wires entered.
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(cont’d)
11/10/2011 8:59:52 AM
(cont’d)
conduit Size — Enters or calculates Conduit
Size. Additional presses show the total number of
Wires, Percent Fill, Total
Wire Area and remaining
Wire Area when Conduit
Size is calculated.
conduit type (cond type) —
Defines
Conduit Type by entering the number correlating to the Types shown below. Repeated presses of also toggles through the
Conduit Types.
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
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PRefeRenCe seTTInGs
Press , then to access the
Preferences. Continue pressing to toggle through different settings.
Press or keys to toggle between options. Press any other key to exit Preferences.
KEYSTROKE DISPLAY
(Prefs)
(NEC Code)
(repeats options)
Second press of :
(Ambient
Temperature Units)
NEC 2011
NEC 1996
NEC 1999
NEC 2002
NEC 2005
NEC 2008
NEC 2011
AMBº 30. ºC
AMBº 86. ºC
(repeats options) AMBº 30. ºC
Third press of
:
(Length Units) FEET 1.
(repeats options)
MET 1.
FEET 1.
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basIC maTh oPeRaTIons
This calculator uses standard chaining logic, calculating values in order entered.
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.
DISPLAY
53.25
KEYSTROKE
memoRY oPeRaTIons
266.25
23.75
200.
The Cumulative Memory is located above . Single value storage positions can also be found within digits through .
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using M+
KEYSTROKE
1. Add to Memory:
(M+)
(M+)
2. Recall Total:
3. Display/Clear Memory:
DISPLAY
M+ 355.
M+ –255.
TTL 100.
AVG 50.
CNT 2.
&
&
&
&
&
100.
using Memory Storage Keys (M1- M9)
KEYSTROKE
DISPLAY
M-1 175.
0.
M-1 175. uSING ThE electricalc pro
KIRChhoff’s laW
The ElectriCalc Pro
can easily find
Volts, Amps, VA, Watts, HP (theoretical),
Efficiency and Power Factor.
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Finding Voltage
Find the Voltage supply to a 1Ø load drawing 14,605 VA and 115 Amps.
KEYSTROKE
1. Set to 1-Phase:
(1Ø)
2. Enter VA:
3. Enter Amps:
4. Solve for Volts:
DISPLAY
0.
1 Ø
1 Ph
VA 14,605.
AMPS 115.
VOLT 127.
Finding Amps
What is the current for a load drawing
8,250 VA on a 240V, 3Ø circuit?
KEYSTROKE
DISPLAY
0.
1. Set to 3-Phase:
(3Ø)
2. Enter VA:
3Ø
3 Ph
VA 8,250.
3. Enter Volts:
4. Solve for Amps:
VOLT 240.
AMPS 19.846416
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Finding Volt-Amps
What is the VA rating for a 120 Volt,
22 Amp, 1Ø circuit?
KEYSTROKE DISPLAY
0.
1. Set to 1-Phase:
(1Ø)
1 Ø
1 Ph
2. Enter Volts:
3. Enter Amps:
4. Solve for Volt-Amps:
Finding kW Rating
VOLT 120.
AMPS 22.
VA 2,640.
What’s the kW rating for a 90 Amp,
208V, 3Ø boiler with 100% Power
Factor?
KEYSTROKE
DISPLAY
0.
1. Set to 3-Phase:
(3Ø)
3Ø
3 Ph
2. Set Power Factor:
(PF%) PF% 100.
3. Enter Amps:
AMPS 90.
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(cont’d)
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(cont’d)
KEYSTROKE
4. Enter Volts:
DISPLAY
VOLT 208.
5. Solve for kW:
KW 32.423991
ohm’s laW
The ElectriCalc Pro uses Ohm’s Law solve for DC Voltage, Current, or
Resistance.
Finding Volts
The Current in a circuit is 0.0125 Amps, and the total Resistance is 480 Ohms.
Find the Voltage.
DISPLAY
0.
KEYSTROKE
1. Enter Current:
(Idc)
2. Enter Resistance:
(R)
3. Find Voltage:
(Vdc)
Finding Amps
Idc 0.0125
A
OhMS 480.
Vdc 6.
V
A 120k electrical resistor is plugged into a 12 volt circuit. Find the Current.
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KEYSTROKE
1. Enter Resistance:
(R)
2. Enter Voltage:
(Vdc)
DISPLAY
0.
KOhM 120.
Vdc 12.
V
3. Find Current:
(Idc) 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.
KEYSTROKE
1. Enter Voltage:
(Vdc)
2. Enter Current:
(Idc)
DISPLAY
0.
Vdc 240.
V
Idc 14.6
A
3. Find Resistance:
(R) OhMS 16.438356
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MOTOR FuNCTIONS
The ElectriCalc Pro can calculate the Full-Load Current (Amps) of a motor, based on Phase, Voltage and
Motor (Synchronous, Induction, or
DC) Horsepower using NEC Tables
430.247, 430.248 and 430.250.
Finding 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:
1 Ø
1 Ph
VOLT 230.
3. Enter HP:
IND* 2. hP
* Press until iND is displayed in the upper left area of the display.
4. Find Full-Load Current:
FLC 12.
A
Finding Motor Wire Size
Find the Wire Size required to connect a continuous run, 3Ø, 10 HP Induction motor into a 230V circuit.
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KEYSTROKE
1. Set to 3-Phase:
(3Ø)
2. Set to 60º C:
(60º)
DISPLAY
0.
3Ø
3 Ph
3Ø 60
3 Ph
3. Set to Copper (if necessary):
(Cu/Al)
3Ø 60 Cu
3 Ph
4. Enter Volts:
VOLT 230.
5. Enter HP:
IND* 10. hP
* Press until iND is displayed in the upper left area of the display.
6. Find Full-Load Current:
FLC 28.
A
7. Find 125% Ampacity Wire Size:
(125%)
AWG 8 Cu
WIRE SIZE 125% amPaCITY WIRe sIZInG
Wire Sizing is based on Ampacity requirements used in NEC Tables
310.15(B)(16) and 310.15(B)(17).
Wire Sizing
Wiring is being installed for a 240V,
1Ø system rated at 30 kVA. What is the 60° C Copper Wire Size?
(cont’d)
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(cont’d)
KEYSTROKE
1. Set to 1-Phase:
(1Ø)
DISPLAY
0.
1 Ø
1 Ph
2. Set to 60º C:
(60º)
1 Ø 60
1 Ph
3. Set to Copper (if necessary):
(Cu/Al)
1 Ø 60 Cu
1 Ph
4. Enter kVA:
KVA 30.
5. Enter Volts:
6. Find Amps:
VOLT 240.
AMPS 125.
7. Find Wire Size:
AWG 0 Cu
WIRE SIZE
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
1. Set to 3-Phase:
(3Ø)
2. Set to 75º C:
(75º)
DISPLAY
0.
3Ø
3 Ph
3Ø 75
3 Ph
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3. Set to Copper (if necessary):
(Cu/Al)
3Ø 75 Cu
3 Ph
4. Enter Amps:
AMPS 265.
5. Find Wire Size:
AWG 300 Cu
WIRE SIZE
6. Change to Aluminum:
(Cu/Al) AWG 400 AL WIRE SIZE
Sizing Parallel Conductors (Free air)
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?
KEYSTROKE
DISPLAY
0.
1. Set to 60º C:
(60º)
60
0.
2. Set to Copper (if necessary):
(Cu/Al)
60 Cu
0.
3. Set to Free Air mode:
(FrAir)
60 Cu FrAir
0.
4. Enter Amps:
AMPS 500.
5. Find Wire Size for one conductor:
AWG 500 Cu
WIRE SIZE
(cont’d)
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(cont’d)
KEYSTROKE DISPLAY
6. Find Wire Size for two conductors:
PAR 000 Cu
WIRE SIZE
7. Exit Free Air Mode and Clear:
60 Cu
0.
Finding Derated Wire Size
A circuit was built with 60°C Copper wire connecting a 47,650 VA load to a 240 Volt, 3Ø source. Ambient
Temperature is 50°C. What is the
Derated Wire Size required if eight current-carrying THHN wires are installed in the raceway?
KEYSTROKE
1. Set to 3-Phase:
(3Ø)
2. Set to 60º C:
(60º)
DISPLAY
0.
3Ø
3 Ph
3Ø 60
3 Ph
3. Set to Copper (if necessary):
( Cu/Al )
3Ø 60 Cu
3 Ph
4. Enter Volt-Amps:
5. Enter Volts:
6. Find Amps:
VA 47,650.
VOLT 240.
AMPS 114.62808.
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7. Set to 50º C Ambient Temperature:
( Ambº )
Amb
AMB° 50. ºC
8. Find Derated Wire Size:
(D/R Size) D/R 500 Cu
WIRE SIZE
9. Reset Ambient Temperature and Clear:
3Ø 60 Cu
0.
VolTaGe DRoP
The ElectriCalc Pro uses Resistance values found in NEC Table 8 Chapter
9 to determine Voltage Drop, Wire
Lengths or Wire Sizes given a maximum Voltage Drop percentage.
Finding 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?
KEYSTROKE
DISPLAY
0.
1. Set to 1-Phase:
(1Ø)
1 Ø
1 Ph
2. Set to 75 º C:
(75º)
1 Ø 75
1 Ph
(cont’d)
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(cont’d)
KEYSTROKE DISPLAY
3. Set to Copper (if necessary):
(Cu/Al)
1 Ø 75 Cu
1 Ph
4. Enter Amps:
5. Enter Volts:
AMPS 11.
VOLT 208.
6. Enter Length:
FEET 175.
7. Enter Wire Size:
AWG 8 Cu
WIRE SIZE
8. Solve Voltage Drop:
DROP 3.0
V
9. Solve percent Voltage Drop:
DROP 1.4
% V
Finding Voltage Drop Wire Size
A 20 Amp, 3Ø 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 required for this branch circuit?
KEYSTROKE
1. Set to 3-Phase:
(3Ø)
2. Set to 75º C:
(75º C)
DISPLAY
0.
3Ø Ph
3Ø 75
3 Ph
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3. Set to Copper (if necessary):
(Cu/Al)
3Ø 75 Cu
3 Ph
4. Enter Amps:
AMPS 20.
5. Enter Volts:
6. Enter Length:
VOLT 208.
FEET 175.
7. Enter allowable VD%:
DROP 3.0
% V
8. Find Wire Size:
AWG 8 Cu
VD WIRE SIZE
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.
KEYSTROKE
DISPLAY
0.
1. Set to 3-Phase:
(3Ø)
2 Set to 60º C:
(60º)
3Ø
3 Ph
3Ø 60
3 Ph
3. Set to Copper (if necessary):
(Cu/Al)
3Ø 60 Cu
3 Ph
(cont’d)
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(cont’d)
KEYSTROKE
4. Enter Amps:
DISPLAY
AMPS 15.
5. Enter Volts:
VOLT 240.
6. Enter Wire Size:
* AWG 10 Cu
WIRE SIZE
7. Enter 3% allowable Voltage Drop:
DROP 3.0
% V
8. Find distance:
FEET 234.86987
Finding Voltage Drop Resistance
What is the Resistance per 1,000 Ft. of #2 90° C Copper conductor?
KEYSTROKE
DISPLAY
0.
1. Set to 90º C:
(90º)
90
0.
2. Set to Copper (if necessary):
(Cu/Al)
90 Cu
0.
3. Enter Wire Size:
* AWG 2 Cu
WIRE SIZE
4. Find Resistance:
(Wire Res) OhMS 0.2033993
WIRE
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GRounD ConDuCToR
WIRe sIZe
The ElectriCalc Pro uses NEC Table
250.66 to find the Grounding Electric
Conductor Size for an entered Feeder
Size.
Find the Grounding electrode conductor Wire Size required when a 2/0 Copper service-entrance conductor is being used.
KEYSTROKE
DISPLAY
0.
1. Enter Wire Size and find Ground
Wire Size:
GRND 4 Cu
WIRE SIZE
2. Find Aluminum size:
GRND 2 AL
WIRE SIZE eQuIPmenT GRounDInG
CounDuCToR WIRe sIZe
The ElectriCalc Pro uses an external amperage to find 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.
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(cont’d)
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(cont’d)
KEYSTROKE
DISPLAY
0.
1. Find Equipment Ground Wire Size:
(EqGrnd) EQPG 10 Cu
WIRE SIZE
2. Find Aluminum size:
EQPG 8 AL
WIRE SIZE fuse anD CIRCuIT bReaKeR sIZe
Fuse and Breaker sizing is determined by NEC Table 430.52.
Once the Motor Type is defined via , a Full-Load Current amperage value can be used to find the Fuse Breaker Sizes.
What is the Dual Element Fuse size for a 230 Volt, 3-Phase, 50 HP
Induction motor?
KEYSTROKE
DISPLAY
0.
1. Set to 3-Phase:
(3Ø)
2. Enter Volts:
3Ø
3 Ph
VOLT 230.
3. Enter HP:
IND* 50. hP
* Press until iND is displayed in the upper left area of the display.
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4. Find Full-Load Current:
FLC 130.
A
5. Find Dual Element Fuse size:
AMPS 227.5 dE sTaRTeR sIZe
What size NEMA Starter is required for a 575 Volt, 3Ø, 20 HP
Induction motor?
KEYSTROKE
1. Set to 3-phase:
(3Ø)
2. Enter Volts:
DISPLAY
0.
3Ø
3 Ph
VOLT 575.
3. Enter HP:
IND* 20. hP
* Press until iND is displayed in the upper left area of the display.
4. Solve for Starter Size:
(Starter) STAR
SIZE
2 oVeRloaD PRoTeCTIon sIZe
What Overload Protection device size is required for an Induction motor with a nameplate rating of 19.2 Amps and a 1.0 service factor? What is the required Overload at 125% (for a 1.15 service factor)?
(cont’d)
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(cont’d)
KEYSTROKE
DISPLAY
0.
1. Enter nameplate Current:
AMPS 19.2
2. Find Overload size:
AMPS 22.08 o l
3. Display percent used:
%FLC 115.
%
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. To select a specific Conduit
Type, enter the corresponding number of the Conduit as shown below and then press .
1) EMT 4) IMC 7) LFMC 10) P-40
2) ENT 5) LFNB 8) RMC 11) P-A
3) FMC 6) LFNA 9) P-80 12) P-EB
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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
1. Set to 1-Phase:
(1Ø)
2. Set to 60º C:
(60º)
DISPLAY
0.
1 Ø
1 Ph
1 Ø 60
1 Ph
3. Set to Copper (if necessary):
(Cu/Al)
1 Ø 60 Cu
1 Ph
4. Enter Volts:
VOLT 115.
5. Enter Horsepower:
IND 10. hP
* Press until iND is displayed in the upper left area of the display.
6. Display Full-Load Amps:
FLC 100.
A
7. Find Wire Size at 125% Ampacity:
(125%)
AWG 0 Cu
WIRE SIZE 125%
8. Find Wire Ampacity:
Ø 125.0
WIRE A125%
(cont’d)
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(cont’d)
KEYSTROKE DISPLAY
9. Enter Conduit Type and find
Conduit Size:
(Cond Type) RMC 1.25 in
COND SIZE
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
Finding Conduit Size —
Multiple conductors, Different Wire
Sizes and types
Three 1/0 THWN conductors and one
#2 XHHW conductor are to connect to a panel board using a single Conduit.
What is Conduit Size needed and actual Fill Area?
KEYSTROKE
DISPLAY
0.
1. Enter Conduit Type:
FMC nonE
COND
(Cond Type)
2. Enter first Wire Size:
* AWG 0 Cu
WIRE SIZE
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3. Enter number of THWN Wires:
ThhN 3.
WIRES
4. Enter second Wire Size:
* AWG 2 Cu
WIRE SIZE
5. Enter number of XHHW Wires:
XhhW 1.
WIRE
6. Find Conduit Size:
FMC 1.50 in
COND SIZE
7. Find total number of Wires:
4.
TTL WIRES
8. Find Conduit Fill Percent:
FILL 36.1
% COND
9. Find actual Fill Area:
FILL 0.6711
TTL WIRE AREA
10. Find Remaining Area:
REM 0.0717
WIRE AREA
ConVeRTInG KIloWaTT-houR anD bTu
Find the equivalent BTU rating of a
3.5 kilowatt-hour rated furnace.
KEYSTROKE
1. Enter kilowatt hours:
DISPLAY
0.
3.5
2. Find equivalent BTU:
(Kw-hr
►Btu) BTu 11,953.552
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(cont’d)
What is the kilowatt-hour rating for a
4,500 BTU heater?
KEYSTROKE
DISPLAY
0.
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
1. Enter first Resistor:
(Par Res)
DISPLAY
0.
P-RS 10.
2. Enter second Resistor:
P-RS 6.6666667
(Par Res)
3. Enter third Resistor:
P-RS 5.8823529
(Par Res)
Note: The total is recalculated with each additional Resistor value entered.
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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 Material Copper
3Ø Phase
Ambient
Temperature
Volts
30º C (86º F)
240V
3% Voltage Drop %
Power Factor %
Efficiency %
Motor Type
Conduit Type
100%
100%
Induction
EMT
Fuse/Breaker
Motor Type
Overload FLC%
Free Air Mode*
Squirrel Cage non Design E
115%
Off
* This setting will also return to its default upon turning the calculator off and back on.
If you replace your batteries or perform a Full Reset* (Press , hold down and press ) your calculator will return to the following settings (in addition to those listed above):
(cont’d)
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(cont’d)
PREFERENCE
SETTINGS
NEC Code
DEFAuLT
VALuE
2011
Temperature Units °C
Length Units FEET
* Depressing the Reset button located
above the key will also perform a
Full Reset.
APPENDIX B — care iNStrUctioNS
Please follow the guidelines listed in this section for proper care and operation of your calculator. Not following the instructions listed below may result in damage not covered by your warranty. Refer to the
Warranty section on page 61 of the
User's Guide for more details..
Do not expose calculator to temperatures outside the operating temperature range of 32ºF
– 104ºF (0ºC – 40ºC).
Do not expose calculator to high moisture such as submersion in water, heavy rain, etc.
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APPENDIX C — 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.
At this point, you can determine what caused the error and re-key the problem.
Error Codes
DISPLAY
OFLO
ERROR TYPE
Overflow; answer too large to display
Invalid entry ENT Error
POWR Error Power Factor
(PF) or Efficiency (EFF) calculated above 100%
(cont’d)
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(cont’d) nonE hP Error
FuLL Error
Unable to calculate or not available
Invalid Horsepower entry per
NEC table
Entered or calculated more than 15 different
Wires Sizes
EROM Error
MATh Error
Bad EPROM
Math error (i.e., divide by zero) 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.
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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.
Battery Replacement Instructions
While the calculator is off, turn the calculator over and use a
#1 Phillips screwdriver to remove the battery holder screw located near the center at the top. With the screw removed, pull battery holder out, remove old battery, and slide new battery into holder.
The negative side of the battery should be facing you as you insert the battery holder into the calculator.
Replace screw using a
#1 Phillips screwdriver.
ReseT
If your calculator should ever “lock up,” press Reset — a small hole located below the key — to perform a total reset.
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REPAIR AND RETuRN
ReTuRn GuIDelInes
1.
Please read the Warranty in the
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.
If you believe you need to return your product, please call a
Calculated Industries representative between the hours of 7:00am to 4:30pm
Pacific Time for additional information and a Return
Merchandise Authorization
(RMA).
Call Toll Free: 1-800-854-8075
Outside uSA: 775-885-4900 www.calculated.com/warranty
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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
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11/10/2011 8:59:54 AM
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