Electricity Lesson II

1
Electricity Lesson II

• Electrical Symbols
• EE

2
Electrical Symbols

• Power Supply
• Hot lead attaches to plain pole
• Ground or neutral wire attaches to pole with
  inverted tree

3
Electrical Symbols
B

• Switch Wiring
• color coded wires to complete the desired circuit
• 5 conductor colors
• Black, White, Red,
• Blue, Yellow
• Green safety ground

W
R
Bl
Y
S
4
Electrical Symbols

• Junction Box
• All splices must be done within a box
• If only splices are needed, it is called a
  junction box

J
5
Electrical Symbols

• Light Socket
• socket where an incandescent light bulb is placed
• power wire to dark screw
• neutral wire to light screw

L
6
Electrical Symbols

• Duplex Outlet
• household outlet with two receptacles
• power wire to dark screws
• neutral wire to light screws
• can be split wired

O
7
Electrical Symbols

• Quadraplex Outlet
• outlet with four receptacles
• two duplex receptacles in one outlet box
• may be split wired

O
8
Electrical Symbols

• Surface/Pendant Flourescent Fixture
• Flourescent lights in the shop

9
Electrical Symbols

• Recessed Flourescent Light Fixture
• Flourescent lights in the Ag classroom

R
10
Electrical Symbols

• Single Pole Switch
• connects or disconnects a circuit from one
  location in a 115 volt circuit
• wire into hot side of 115 volt circuit
• attach green safety wire

S
S
11
Electrical Symbols

• Single Pole Switch Connections
• 115 volt circuit
• Switch is Off
• Switch is On

S
S
12
Electrical Symbols

• Double Pole Switch
• connects or disconnects a 230 volt circuit from
  one location.
• Wire into both hot leads of a 230 volt circuit

2
S2
13
Electrical Symbols

• Double Pole Switch Connections
• 230 volt circuit
• Switch is Off
• Switch is On

2
2
14
Electrical Symbols

• Three Way Switch
• usually used in combination with one or more
  additional switches in 115 volt circuits
• controls a circuit from more than one location

S3
15
Electrical Symbols

• Three Way Switch Connections
• 115 volt circuits
• Switch knob left
• Switch knob right

16
Electrical Symbols

• Four Way Switch
• used in combination with 2 three way switches in
  115 volt circuits.
• controls circuit from three or more locations.

S4
17
Electrical Symbols

• Four Way Switch Connections
• 115 volt circuits
• Switch knob left
• Switch knob right

18
Electrical Symbols/Circuits
L1
s1
S1 controls L1
19
Electrical Symbols/Circuits
L1
s1
S1 controls L1
20
Electrical Symbols/Circuits
Cu
Screw
B
B
L1
s1
W
W
Al
Screw
S1 controls L1
21
Electrical Symbols/Circuits
Control light from two locations
L1
S1
S2
22
Electrical Symbols/Circuits
Control light from two locations
L1
S1
S2
23
Electrical Symbols/Circuits
Control light from two locations
L1
S1
S2
24
Electrical Symbols/Circuits
Control light from two locations
Takes 2 Three Ways
L1
S1
S2
25
Electrical Symbols/Circuits
Control light from two locations
Takes 2 Three Ways
Cu
Screw
B
B
B
L1
S1
S2
W
W
W
Al
Screw
26
Electrical Symbols/Circuits
Control light from two locations
Takes 2 Three Ways
Cu
Screw
B
B
B
L1
S1
S2
R
W
W
W
Al
Screw
27
Electrical Symbols/Circuits
Control a light from 3 locations
S1
S2
S3
L1
28
Electrical Symbols/Circuits
Control a light from 3 locations
S1
S2
S3
L1
29
Electrical Symbols/Circuits
Control a light from 3 locations
S1
S2
S3
W
W
W
W
L1
30
Electrical Symbols/Circuits
Control a light from 3 locations
Takes two 3 ways one 4 way
S1
S2
S3
W
W
L1
31
Electrical Symbols/Circuits
Control a light from 3 locations
Takes two 3 ways one 4 way
B
B
B
S1
S2
S3
W
W
W
B
W
Cu
Al
L1
Screw
Screw
32
Electrical Symbols/Circuits
Control a light from 3 locations
Takes two 3 ways one 4 way
B
B
B
S1
S2
S3
R
R
W
W
W
B
W
Cu
Al
L1
Screw
Screw
33
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