Copyright Goodheart-Willcox Co., Inc.
Contents
Unit 1
Electrical Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Voltage, Current, Resistance, Ohm’s Law, Power, Circuit,
Switch, Direct Current, Alternating Current
Unit 2
Conductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wire Size and Color, Nonmetallic and Armored Cable,
Cords, Wiring Must Meet Codes
Unit 3
Conduits and Raceways . . . . . . . . . . . . . . . . . . . . . . 21
Rigid Steel Conduit, Thinwall Steel Conduit, Aluminum
Rigid Conduit, Flexible Steel Conduit, Rigid Plastic
Conduit, Surface Raceways
Unit 4
Boxes and Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Box Construction, Box Covers or Plates
Unit 5
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Single-Pole Switches, Three-Way Switches, Four-Way
Switches, Dimmer Switch
Unit 6
Outlet Receptacles . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Receptacle Types
Unit 7
Electrician’s Tools and Equipment . . . . . . . . . . . . . 47
Pliers, Screwdrivers, Drilling Equipment, Sawing and
Cutting Tools, Soldering Equipment, Multipurpose Tool,
Hammers, Measuring Tools, Fish Wire or Tape,
Miscellaneous Tools and Equipment
Unit 8
Working Safely. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Shock Effects, Freeing a Victim, Safety Suggestions
Unit 9
Service Requirements . . . . . . . . . . . . . . . . . . . . . . . . 59
Service Entrance Ratings, Electrical Symbols, Branch
Circuits, Building Code Example
Unit 10
Basic Wiring Systems . . . . . . . . . . . . . . . . . . . . . . . . 67
Sheathed Nonmetallic Cable, Installing Armored Cable,
Installing Metal Conduit, Protective Grounding System,
Ground-Fault Circuit Interrupters, Arc Fault Circuit
Interrupters p
4