Electrical Diagrams

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

Electrical Symbols

Wiring Diagram Symbols Key Hot Wire Neutral Wire Ground Wire

Wiring Diagram Symbols SEP Service Entrance Panel

Wiring Diagram Symbols Rec Receptacle

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

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

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

Wiring Diagram Symbols Lt or Lamp Light

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

Wiring Diagram Symbols Receptacle or Switch Box

Wiring Diagram Symbols Light Box

Wiring Diagram Symbols wire 142 w/g

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

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

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

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

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

ground clip

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

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

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

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

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

SEP Rec Key Hot Wire Neutral Wire Ground Wire

SEP Rec Rec

SEP Rec Rec Key Hot Wire Neutral Wire Ground Wire

SEP Light with pull chain switch

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

SEP S Lt (Controls light)

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

SEP S Rec (Controls Rec)

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

SEP Lt S (Controls light)

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

SEP Lt S (Controls both lights) Lt

Key Hot Wire Neutral Wire Ground Wire

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

Key Hot Wire Neutral Wire Ground Wire

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

Electrical Word Problems

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

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 = =

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 = =

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 =

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 = = = =