1. Electrical Diagrams

2. Standard Electrical Symbols
Used on drawings to indicate location of:
Outlets
Receptacles
Switches
Special appliances
Useful to know!
Reading blueprints
Planning electrical wiring systems

3. Electrical Symbols

4. Wiring Diagram Symbols
Key
Hot Wire
Neutral Wire
Ground Wire

5. Wiring Diagram Symbols
SEP
Service Entrance Panel

6. Wiring Diagram Symbols
Rec
Receptacle

7. Wiring Diagram Symbols
Single Pole Switch
(Use when only one switch controls an outlet)

8. Wiring Diagram Symbols
3-Way Switch
(Use when two switches control an outlet)

9. Wiring Diagram Symbols
4-Way Switch
(Use when more than two switches control an outlet)

10. Wiring Diagram Symbols
Lt or Lamp
Light

11. Wiring Diagram Symbols
Main
circuit breaker
ground bar
Service Entrance Panel or SEP

12. Wiring Diagram Symbols
Receptacle or Switch Box

13. Wiring Diagram Symbols
Light Box

14. Wiring Diagram Symbols
wire
142 w/g

15. Wiring Diagram Symbols
Bronze terminal
For
Hot wire
Silver terminal
For
Neutral wire
Receptacle

16. Wiring Diagram Symbols
Single Pole Switch
(Use when only one switch controls an outlet)

17. Wiring Diagram Symbols
Common terminal
3 Way Switch
(Use when two switches control an outlet)

18. Wiring Diagram Symbols
4 Way Switch
(Use when more than two switches control an outlet)

19. Wiring Diagram Symbols
Bronze terminal
For
Hot wire
Silver terminal
For
Neutral wire
Light

20. ground clip

21. Basic Wiring Rules 1. Connect wires in SEP neutral wire to ground bar
ground (bond) wire to ground bar
hot wire to circuit breaker

22. Basic Wiring Rules
2. Connect neutral wire to all receptacles, lights, and any other outlet
Do not connect neutral wires to a switch

23. to first common terminal of switch
Basic Wiring Rules
3. Connect hot wire from SEP to any outlet that remains hot all the time
and
to first common terminal of switch

24. 4. Connect black wire from switch to light or whatever it controls
Basic Wiring Rules
4. Connect black wire from switch to light or whatever it controls

25. Basic Wiring Rules
5. Connect ground (bond) wire to all metal boxes

26. SEP
Rec
Key
Hot Wire
Neutral Wire
Ground Wire

27. SEP
Rec
Rec

28. SEP
Rec
Rec
Key
Hot Wire
Neutral Wire
Ground Wire

29. SEP
Light with pull chain switch

30. Light with pull chain switch
SEP
Light with pull chain switch
Key
Hot Wire
Neutral Wire
Ground Wire

31. SEP S Lt
(Controls light)

32. SEP S Lt
(Controls light)
Key
Hot Wire
Neutral Wire
Ground Wire

33. SEP S
Rec
(Controls Rec)

34. SEP S
Rec
(Controls Rec)
Key
Hot Wire
Neutral Wire
Ground Wire

35. SEP Lt S
(Controls light)

36. SEP Lt S
(Controls light)
Key
Hot Wire
Neutral Wire
Ground Wire

37. SEP Lt S
(Controls both lights) Lt

38. Key
Hot Wire
Neutral Wire
Ground Wire

39. SEP Lt
Rec
(Hot all the time) S
(Controls light)

40. Key
Hot Wire
Neutral Wire
Ground Wire

41. (Controls lights)
SEP S
REC
REC
(Hot all the time) Lt Lt Lt

43. Electrical Word Problems

44. 10. Draw an electrical diagram for a bedroom that has a light controlled by a switch and a receptacle on each wall. s = = = =

46. 11. Draw an electrical diagram for a family room that has two lights (each is controlled by its own separate switch) and there are two receptacles on each wall. = = = = = = s s = =

48. 12. Draw an electrical diagram for a kitchen that has four receptacles located over the countertops which can be used for small appliances. The kitchen also has a light controlled by a switch in the center of the room and a light located over the sink that is controlled by a switch. s = =
Refrig. s = =

50. 13. Draw an electrical diagram for a bedroom that has a light located in the center of the room that is controlled by a switch and a receptacle on each wall. The bedroom also has a closet light that is controlled by a switch. s = = = s =

52. 14. Draw an electrical diagram for a workroom that has three ceiling lights controlled by the same switch. There are two work benches and each has two receptacles, one located on each side. s = = = =