AGA XH0206 : 2002

I. INTRODUCTION
  Historical Background on Discovery of Electricity
  Use of Gas and Electricity Together to Improve the Way of
  Life for Everyone
  CHAPTER REVIEW
II. HOW ELECTRICITY IS SUPPLIED
  Potential Difference, Electromotive Force (EMF) or Voltage
  Devices to Provide an Electromotive Force (Voltage)
    The Chemical Cell or Battery
    Mechanical Generators
    Thermoelectric Sources of Voltage
    Piezoelectric Sources of Voltage
  CHAPTER REVIEW
III. ELECTRICAL TERMS
  The Volt
    Millivolt Systems (DC)
    24-Volt Systems
    120-Volt, 240-Volt Systems
    High Voltages
  The Ampere
  The Ohm
    Conductors
    Resistors
    Insulators
  Capacitance
  Inductance
  The Watt (Electrical Power)
  CHAPTER REVIEW
IV. ELECTRICAL RELATIONSHIPS
  Ohm's Law
  Series and Parallel Circuits
    Series Circuits
    Parallel Circuits
  Impedance
  Watt's Law
  Formula Circle
  CHAPTER REVIEW
V. BASIC ELEMENTS OF ELECTRICAL CIRCUITS
  Source
    Line Voltage Sources
    Thermoelectric Voltage Sources
  Current Control Devices - Switches and Resistors
    Electrical Switches
    Electrical Resistors
  Load
  CHAPTER REVIEW
VI. CIRCUIT COMPONENTS AND THEIR GRAPHIC SYMBOLS
  Receptacles and Plugs
  Thermocouples and Thermopiles
  Lines and Connections
  The Fuse and the Circuit Breaker
    Fuse
    Circuit Breaker
  Ground
  Ground Fault Circuit Interrupter or GFI
  Switches
  Switch Poles and Throws
    Single Pole - Single Throw Switch (SPST)
    Single Pole - Double Throw Switch (SPDT)
    Double Pole - Single Throw Switch (DPST)
    Double Pole - Double Throw Switch (DPDT)
  Methods of Actuating Switches
    Manual Switches
    Mechanically Actuated Switches
    Pressure Actuated Switches
    Temperature Actuated Switches
    Electromagnetically Actuated Switches (Relays)
  Normally Open or Normally Closed Switches
  Electrical Resistors
    Fixed Resistors
    Variable Resistors
  Rectifiers
  Load Components in Electrical Circuits
    Resistive Components
      The Incandescent Light
      Resistive Heating Elements
      Hot Surface Ignitors
    Capacitors
    Transformers
    Spark Gap
    Fluorescent Lamps and Ballasts
    Bells and Buzzers
    Motors
    Motor Starters and Start Switches
    Solenoids
  CHAPTER REVIEW
VII. ELECTRICAL CIRCUIT DIAGRAMS
  Connection Diagram
  Schematic Diagram
  CHAPTER REVIEW
VIII. POLARITY
  Hot and Neutral Lines
  How to Determine Polarity
  CHAPTER REVIEW
IX. TEST EQUIPMENT
  Test Lights
    Filament Bulb Test Light
    Neon Test Light
  Jumper Wire
  Continuity Tester
  Volt-Ohm Meter
    The Voltmeter
    The Ohmmeter
    Use of Volt Ohmmeters
    The Ammeter
  Millivoltmeter
    Open Circuit Voltage
    Closed Circuit Voltage
  CHAPTER REVIEW
X. APPLICATION
  DC Millivolt Circuits
    Single Thermocouple Systems
    Thermopile Systems
  Low Voltage Circuits
  Line Voltage Circuits
    Limit Controls, Thermostats and Automatic Gas Control Valves
    Motors
    Timer Circuits
  CHAPTER REVIEW
XI. ELECTRICAL SAFETY
  CHAPTER REVIEW
ANSWERS TO CHAPTER REVIEWS
REFERENCES
GLOSSARY
APPENDIX Graphic symbols of Some Items Extracted From
         ANSI Y32.2 1975, Graphic Symbols for Electrical
         and Electronic Diagrams and Abbreviations for These
         Items