Audel Electrical Course for Apprentices and Journeymen

Spend your study time wisely

As you advance from student to apprentice to journeyman status, you
log a lot of study hours. Make the most of those hours with this
fully updated, sharply focused self-study course. It contains
everything you need to know about electrical theory and
applications, clearly defined and logically organized, with
illustrations for clarity and review questions at the end of each
chapter to help you test your knowledge.

• Understand electron theory and how electricity affects matter

• Recognize applications for both alternating and direct
  current

• Comprehend Ohm's Law and the laws governing magnetic
  circuits

• Learn from detailed drawings and diagrams

• Explore trigonometry and alternative methods of calculation

• Identify instruments and measurements used in electrical
  applications

• Apply proper grounding and ground testing, insulation testing,
  and power factor correction

Autorentext

Paul Rosenberg is a master electrician with extensive experience in all aspects of the industry. An instructor at Iowa State University, he has written for all the major electrical industry publications. He is also the author of Audel Questions and Answers for Electrician's Examinations, 14th Edition.

Zusammenfassung
Spend your study time wisely

As you advance from student to apprentice to journeyman status, you log a lot of study hours. Make the most of those hours with this fully updated, sharply focused self-study course. It contains everything you need to know about electrical theory and applications, clearly defined and logically organized, with illustrations for clarity and review questions at the end of each chapter to help you test your knowledge.

• Understand electron theory and how electricity affects matter
• Recognize applications for both alternating and direct current
• Comprehend Ohm's Law and the laws governing magnetic circuits
• Learn from detailed drawings and diagrams
• Explore trigonometry and alternative methods of calculation
• Identify instruments and measurements used in electrical applications
• Apply proper grounding and ground testing, insulation testing, and power factor correction

Inhalt
Introduction xiii

Chapter 1 Electricity and Matter 1

Elements, Atoms, Molecules, and Compounds 1

Electron Theory 3

Electric Current 9

Insulators and Conductors 11

Questions 12

Chapter 2 Units and Definitions 13

Fundamental and Derived Units 13

Definitions 15

Magnetic Units 17

Temperature Units 18

Questions 18

Chapter 3 Electrical Symbols 21

Graphic Electrical Wiring Symbols 21

0.1 Drafting Practices Applicable to Graphic Electrical Wiring Symbols 21

0.2 Explanation Supplementing the Schedule of Symbols 23

List of Symbols 27

1.0 Lighting Outlets 27

2.0 Receptacle Outlets 28

3.0 Switch Outlets 31

4.0 Signaling System Outlets: Institutional, Commercial, and Industrial Occupancies 31

5.0 Signaling System Outlets: Residential Occupancies 36

6.0 Panelboards, Switchboards, and Related Equipment 37

7.0 Bus Ducts and Wireways 38

8.0 Remote Control Stations for Motors or Other Equipment* 39

9.0 Circuiting 39

10.0 Electric Distribution or Lighting System, Underground 40

11.0 Electric Distribution or Lighting System Aerial 41

Arrester, Lightning Arrester (Electric Surge, etc.) Gap 42

Battery 43

Circuit Breakers 43

Circuit Return 45

Coil, Magnetic Blowout* 45

Contact, Electrical 46

Contactor 48

Machine, Rotating 49

Meter Instrument 53

Path, Transmission, Conductor, Cable Wiring 55

Polarity Symbol 56

Switch 57

Transformer 58

Chapter 4 Magnets and Magnetic Fields 63

Magnetic Poles 63

Magnetic and Nonmagnetic Substances 64

The Earth as Magnet 64

Magnetic Lines of Force 65

Molecular Theory of Magnetism 66

Strength of a Magnet 68

Lifting Power of a Magnet 68

Questions 69

Chapter 5 Ohm's Law 71

Statement of Ohm's Law 71

Analogy of Ohm's Law 71

Illustrations of Ohm's Law 72

Ohm's Law and Power 74

The Ohm's Law Circle 74

Formulas 75

Ohm's Law 75

Power in Watts 75

Questions 76

Chapter 6 Capacitors 77

Capacitance 83

Capacitance in Series and Parallel 84

Capacitance in Other Than Regular Capacitors 86

Formulas 87

Questions 87

Chapter 7 Resistance 89

Skin Effect 97

Conductivity 97

Voltage-Drop Calculation 99

Measuring Conductors 100

Questions 101

Chapter 8 Resistance in Series and Parallel 103

Resistances in Series 103

Resistances in Parallel 104

Series-Parallel Circuits 107

Questions 109

Chapter 9 Electrolysis 111

Terminology 111

Chemistry of Electrolysis 112

Electroplating 114

Corrosion 114

Questions 116

Chapter 10 Primary and Secondary Cells 117

The Voltaic Cell 117

Primary Cells 119

Secondary Cells 122

Questions 127

Chapter 11 Electromagnetism 129

Galvanoscope 134

Solenoids 135

Questions 136

Chapter 12 Laws Governing Magnetic Circuits 139

Strength of a Magnetic Pole 141

Intensity of Magnetizing Force 142

Magnetic Reluctance 142

Formulas 149

Questions 149

Chapter 13 Work, Power, Energy, Torque, and Efficiency 151

Torque 155

Prony Brake 156

Formulas 158 Questions 158</p&gt...