:BOOK DESCRIPTION

**Electrical Calculations HandBook By John M. Paschal, Jr**

**Contents**
Chapter 1. Basic Electrical Working Definitions and Concepts 1

Voltage as Potential Difference 1

Current 3

Resistance 4

Direct-Current (dc) Voltage Sources 4

Direct and Alternating Current 5

dc Voltage 6

Current Flow in a Resistive Circuit 15

Current Flow in a Series Resistive Circuit 16

Voltage Division in a Series Circuit 18

Power Rating of a Resistor 18

ac Voltage 23

ac Circuits with Resistance 23

ac Phase Angle and Power 26

Current and Power in a Single-Phase ac Circuit 33

Current and Power in a Three-Phase ac Circuit 33

Inductive Reactance 42

Capacitive Reactance 46

Impedance 52

Chapter 2. Three-Phase Systems 55

Wye-Connected Systems 58

Delta-Connected Systems 60

Chapter 3. Mathematics for Electrical Calculations

Power Factor Correction, and Harmonics 69

Changing Vectors from Rectangular to Polar Form and

Back Again 69

Adding Vectors 70

Multiplying or Dividing Vectors 74

Solving for Current and Power Factor in an ac Circuit

Containing Only Inductive Reactance 75

Solving for Current and Power Factor in an ac Circuit

Containing Both Inductive Reactance and Resistance in

Series with One Another 77

Solving for Current and Power Factor in an ac Circuit

Containing Two Parallel Branches That Both Have Inductive

Reactance and Resistance in Series with One Another 77

Solving for Current and Power Factor in an ac Circuit

Containing Parallel Branches, One of Which Has Inductive

Reactance and Resistance in Series with One Another and

the Other of Which Has a Capacitive Reactance 79

Electrical Power in Common ac Circuits 79

Power Factor Correction to Normal Limits 87

Real Power (Kilowatts), Apparent Power (Kilovoltamperes),

Demand, and the Electrical Utility Bill 90

Power Factor Correction System Design in an Electrical Power

System Containing No Harmonics 93

Power Factor Correction System Design in an Electrical Power

System Containing Harmonics 104

Calculating the Parallel Harmonic Resonance of an Electrical

Power System Containing Capacitors 107

Resulting Values of Adding Harmonic Currents or Voltages 108

Acceptable Levels of Harmonic Current and Voltage 110

The Harmonic Current-Flow Model 111

Effects of Harmonic Current on Transformers 114

Effects of Harmonic Voltage on Motors 116

Harmonic Current Flow through Transformers 116

Harmonic Filters 117

Harmonics Symptoms, Causes, and Remedies 122

Chapter 4. Conductors 125

Conductors, Conductor Resistance, Conductor and Cable

Impedance, and Voltage Drop 125

Calculating the One-Way Resistance of a Wire 125

Calculating the Impedance of a Cable 133

Calculating Voltage Drop in a Cable 140

Calculating dc Resistance in a Bus Bar 143

Calculating Heat Loss in a Conductor 143

Wires and Cables 143

Determining Wire Size Given Insulation Type, Circuit Breaker

Clearing Time, and Short Circuit Current 160

Selecting the Proper Insulation for an Environment 161

Aluminum Conductors 170

Conductor and Cable Selection 170

Chapter 5. Short-Circuit Calculations 179

Sources of Short-Circuit Current 182

The Ability of the Electrical Utility System to Produce

Short-Circuit Current 183

Short-Circuit Contributions of On-Site Generators 184

Short-Circuit Contributions of Motors 185

Let-Through Values of Transformers 187

Let-Through Values of Reactors 188

Let-Through Power Values of Cables 189

Sample Short-Circuit Calculation 190

Chapter 6. Generator Sizing Calculations 195

Sizing a Gas-Turbine Generator Set for a Known Kilowatt Load 196

Sizing a Reciprocating Engine-Driven Generator Set for a

Known Kilowatt Load 198

Sizing of Generator Feeder Conductors 200

Chapter 7. Grounding 205

The Functions of Grounding 205

Calculating the Resistance to Remote Earth of Ground Rods 208

Grounding-Electrode Conductors 211

Equipment-Grounding Conductors 211

Methods of Grounding Systems 215

Obtaining the System Grounding Point 217

Chapter 8. Lighting 221

The Lumen Method 221

The Point-by-Point Method 223

Indoor Lighting 229

Lighting Rules of Thumb 245

Chapter 9. Transformers 251

Three-Phase Transformers 255

Overcurrent Protection of Transformers 265

Buck-Boost Autotransformers 275

Chapter 10. Motors 285

Selecting Motor Characteristics 286

Calculating Motor Running Current 295

Calculating Motor Branch-Circuit Overcurrent Protection

and Wire Size 296

Chapter 11. Raceways 311

Raceway Types and Their Characteristics 311

Chapter 12. Overcurrent Devices 319

Overcurrent Devices: Fuses and Circuit Breakers 319

Fuses 321

Circuit Breakers 323

Medium-Voltage and Special-Purpose Circuit Breakers

and Relay Controllers 325

Chapter 13. Circuits for Special Loads 335

Designing Circuits for Various Electrical Loads 335

Designing an Electrical System for a Commercial Building 339

Designing an Electrical System for an Industrial Facility 349

Chapter 14. Electrical Design and Layout Calculations 357

Straight-Through Pull Box in a Conduit System 357

Angle Pull Box in a Conduit System 358

Working Space Surrounding Electrical Equipment 358

Minimum Centerline-to-Centerline Dimensions of Knockouts

to Provide for Locknut Clearance 364

Chapter 15. Electrical Cost Estimating 371

Electrical Takeoff and Personnel-Hour Cost Estimating 371

Factoring of Labor Units 397

Estimate of Project Expense 409

Engineering Economics Calculations Considering the Time

Value of Money 411

Chapter 16. Conversion Calculations 425

Temperature Conversion Calculations 425

Frequently Used Conversion Calculations 425

Multiple Conversion Calculations 425

**Electrical Calculations Hand Book IN AMAZON**

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