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RULER - INCH
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OHM’S LAW
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SERIES CIRCUITS
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PARALLEL CIRCUITS
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COMBINATION CIRCUITS
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COMMON ELECTRICAL DISTRIBUTION SYSTEMS
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ELECTRICAL
FORMULAS
TO FIND:
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AMPERES (I)
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HORSEPOWER (HP)
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WATTS (P)
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KILO-WATTS (KW)
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KILO-VOLT-AMPERES (KVA)
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CAPACITANCE (C),
AND CAPACITORS
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RESISTOR COLOR
CODE
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POWER FACTOR
CORRECTION
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POWER FACTOR /
EFFICIENCY EXAMPLE
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INDUCTANCE (L)
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IMPEDANCE (Z)
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REACTANCE
(INDUCTIVE (XL) AND CAPACITIVE (XC)
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MOTORS:
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DIRECT CURRENT
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FULL LOAD CURRENT
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DIRECT CURRENT MOTORS
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SINGLE PHASE (A.C.)
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FULL LOAD CURRENT
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USING STANDARD THREE PHASE STARTER
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SINGLE PHASE MOTORS
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RUNNING OVERLOAD
UNITS
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BRANCH CIRCUIT
PROTECTIVE DEVICES
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THREE PHASE MOTORS
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FULL LOAD CURRENT
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GENERAL MOTOR
RULES
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BRANCH CIRCUIT &
FEEDER EXAMPLE
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LOCKED ROTOR
TABLES
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MOTOR WINDINGS &
CONNECTIONS
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THREE WIRE
STOP-START STATION
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TWO THREE WIRE
STOP-START STATIONS
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HAND OFF
AUTOMATIC CONTROL
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JOGGING WITH
CONTROL RELAY
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TRANSFORMERS:
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CALCULATIONS
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VOLTAGE DROP
CALCULATIONS
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SHORT CIRCUIT
CALCULATIONS
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SINGLE-PHASE
CONNECTIONS
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BUCK & BOOST
CONNECTIONS
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FULL LOAD
CURRENTS
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CALCULATIONS
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SIZING TRANSFORMERS
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THREE-PHASE
CONNECTIONS
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MISCELLANEOUS WIRING DIAGRAMS
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SUPPORT FOR
CONDUIT
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CONDUCTOR PROPERTIES
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A.C. RESISTANCE & REACTANCE FOR 600 VOLT CABLES
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ALLOWABLE AMPACITIES OF CONDUCTORS
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AMPACITY CORRECTION & ADJUSTMENT FACTORS
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INSULATION CHART
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MAXIMUM NUMBER OF CONDUCTORS IN CONDUIT / TUBING:
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GENERAL
CALCULATION PROCEDURE
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ELECTRICAL
METALLIC TUBING
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NONMETALLIC
TUBING
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RIGID PVC
CONDUIT, SCHEDULE 40
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RIGID PVC
CONDUIT, SCHEDULE 80
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RIGID METALLIC
CONDUIT
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FLEXIBLE
METALLIC CONDUIT
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LIQUIDTIGHT
FLEXIBLE METALLIC CONDUIT
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DIMENSIONS OF
INSULATED CONDUCTORS
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COMPACT ALUMINUM
BLDG. WIRE DIMENSIONS
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DIMENSIONS &
PERCENT AREA OF CONDUIT
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TABLES:
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TAP, DRILL BIT
AND HOLE SAW TABLES
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METAL BOXES
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MINIMUM COVER
REQUIREMENTS TO 600 VOLTS
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VOLUME REQUIRED
PER CONDUCTOR
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VERTICAL
CONDUCTOR SUPPORTS
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CLEAR WORKING
SPACE IN FRONT OF ELECTRICAL EQUIPMENT
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MINIMUM
CLEARANCE OF LIVE PARTS
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MIN. SIZE EQUIP.
GROUNDING CONDUCTORS
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GROUNDING
ELECTRODE CONDUCTOR
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GENERAL LIGHTING
OCCUPANCY LOADS
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LIGHTING LOAD
DEMAND FACTORS
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DEMAND FACTORS
FOR NONDWELLING .
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DEMAND FACTORS -
HOUSEHOLD CLOTHES DRYERS
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DEMAND FACTORS -
KITCHEN EQUIPMENT
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DEMAND LOADS -
HOUSEHOLD RANGES, OVENS
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COST OF OPERATING ELECTRICAL
APPLIANCE
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CALCULATIONS FOR ENERGY SAVING LAMP
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PARTIAL 2008 NEC CODE CHANGE
SUMMARY
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FIELD TERMS VS. NEC TERMS
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ELECTRICAL
SYMBOLS
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WIRING DIAGRAMS
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NEMA ENCLOSURE TYPES
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GENERAL REFERENCE:
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U.S. WEIGHTS &
MEASURES
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METRIC SYSTEM
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METRIC
DESIGNATOR - TRADE SIZE EQUIVALENTS
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U.S. WEIGHTS &
MEASURES / METRIC EQUIVALENTS
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USEFUL
CONVERSIONS
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SCIENTIFIC
NOTATION
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DECIMAL
EQUIVALENTS
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CONVERSION
TABLES
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METALS
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SPECIFIC
RESISTANCE (K)
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CENTIGRADE &
FAHRENHEIT THERMOMETER SCALES
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MATH REFERENCE:
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USEFUL MATH
FORMULAS
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THE CIRCLE
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FRACTIONS
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EQUATIONS
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TRIGONOMETRY
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CONDUIT BENDING:
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BENDING OFFSETS
WITH TRIGONOMETRY
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CHICAGO-TYPE
BENDERS - 90° BENDING
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CHICAGO-TYPE
BENDERS - OFFSETS
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MULTI-SHOT 90°
BENDING
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HAND BENDER -
OFFSETS
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HAND BENDER -90°
BENDS
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HAND BENDER -
BACK-TO-BACK BENDS
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HAND BENDER -
3-POINT SADDLE BENDS
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MISCELLANEOUS REFERENCE:
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PULLEY
CALCULATIONS
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USEFUL KNOTS
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HAND SIGNALS FOR
CRANE
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ELECTRICAL SAFETY:
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DEFINITIONS
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CHECKLIST
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LOCKOUT / TAGOUT
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SHOCK PROTECTION BOUNDARIES
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WARNING LABEL
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PERSONAL PROTECTION EQUIPMENT GUIDE
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GENERAL FIRST AID
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CALENDARS
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GENERAL TOPIC INDEX
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RULER - METRIC