2. LO 1.1 Prepare a list of select electrical materials and devices for specific job order.
Learning Objectives:
At the end of this lesson, learners are expected to:
1. classify the different electrical materials and
devices used for specific job order.
2. demonstrate materials terminal marking for circuit diagram
identification of electrical task accurately,
3.appreciate the importance of electrical terminal markings of
materials and devices in constructing circuit wiring
diagram.
3. Electric Circuit
The electric circuits are closed-loop or paths,
forming a network of electrical components
where electrons can flow.
This path is made using electrical wires and is
powered by a source, like a battery.
The start of the point from where the
electrons start flowing is called the source,
whereas the point where electrons leave the
electrical circuit is called the return.
4.
5. Electric Circuit Symbols
Every component and product of the electric circuit
contains a symbol. The symbols represent parts of the
circuit in a circuit diagram. Beneath are the basic set
of symbols that are present in a circuit diagram.
11. BLOCK DIAGRAM SCHEMATIC DIAGRAM
L
I
N
E
1
C
O
N
T
R
O
L
L
O
A
D
L
I
N
E
2
LINE
1
LINE
2
CONTROL
LOAD
PATH/CONDUCTOR/
CONNECTING WIRE
12. LEGEND :
RED = LINE SOURCE 2
BLACK =LINE SOURCE 1
YELLOW = RETURN WIRE
LINE
1
LINE
2
RETURN
WIRE /
PATH
PICTORIAL
DIAGRAM SINGLE LINE DIAGRAM
13. Simple Circuit
A simple circuit comprises the power source, conductors, switch,
and load.
1) Cell/ SOURCE/SUPPLY: It is the power source.
2) Load/ RESISTANCE/CURRENT CONSUMING
DEVICE: It is also termed as the resistor. It is a light bulb that
lights when the circuit is turned on.
3) Conductors / PATH / WIRE CONNECTING: They are made
of copper wires with no insulation. One end of the wire is
connected to the load to the power source, and the other end
of the wire connects the power source back to the load.
4) Switch/ CONTROL: It is a small gap in the circuit. There are
various types of switches. A switch can be used to open or
14. Electric circuit,
path for transmitting electric
current.
An electric circuit includes a
device that gives energy to the
charged particles constituting
the current, such as a battery or
a generator; devices that use
current, such as lamps, electric
motors, or computers; and the
connecting wires or
transmission lines.
19. ELECTRICAL DEVICES /
MATERIALS CONNECTION
1: CONSIDER THE TERMINAL MARKING
L= LINE SOURCE SIDE
N= NEUTRAL SIDE / RETURN WIRE
G = = GROUND
C= COMMON SIDE
1=1 AND 3=3 . =FOR FOUR WAY SWITCH
0,1,3 = FOR THREE WAY SWITCH
2: KNOW THE CIRCUIT REQUIREMENT
31. CONTROL
SWITCHES
• SINGLE POLE ( SPST )
• SINGLE POLE , SINGLE THROW
• = INSTALLED / CONNECTED IN ONE PATH /
WIRE CONDUCTOR
32. TWO GANG / THREE
GANG SWITCH
TWO GANG SWITCH= TWO S1 ( SPST) IN ONE
SET OF PLATE / COVER
WITH ONE JUMPER FOR THE LINE SOURCE
THREE GANG SWITCH = THREE S1 ( SPST) IN
ONE SET PF PLATE AND COVER
WITH TWO JUMPER FOR THE LINE SOURCE
35. FOUR WAY
SWITCH
CONTROL SWITCH ONLY INSTALLED IN BETWEEN
TWO S3W –THREE WAY SWITCH AS EXTENSION CONTROL SWITCH
NO LINE SOURCE / NO LOAD SIDE CONNECTION.
WITH MARKING AS 1,2,3,4, OR 1,1 – 3,3
OBSERVED AND FOLLOW THE NUMBER MARKING AS
1 IS TO 1 , 3 IS TO 3 AS TRAVELERS PATH OR
1 IS TO 2, 3 IS TO 4 AS TRAVELERS PATH
44. LAMP PRECEPTACLE / SOCKET / HOLDER
TWO TERMINAL LAMP RECEPTACLE:
TERMINAL L = LINE ( HOT WIRE OR LIVE )
DIRECTLY CONNECTED FROM THE LINE SOURCE
/ SUPPLY
TERMINAL N= RETURN PATH / CONDUCTOR
FROM THE POLE TERMINAL OF CONTROL
SWITCH
( COMPLETING THE FLOW OF CURRENT)
===FOR THREE TERMINAL LAMP
RECEPTACLE
TERMINAL L ========
TERMINAL N ========
TERMINAL GROUND ==
45. ELECTRICAL CIRCUIT DIAGRAM
BLOCK DIAGRAM
SCHEMATIC DIAGRAM
PICTORIAL DIAGRAM
SINGLE LINE DIAGRAM
LINE
SOURCE 1
LOAD CONTROL
SWITCH
LINE
SOURCE 2
46. lets do the Schematic Diagram:::
things to remeber :
1) know the circuit requirements / condition,
2) analyze the condition then transform it into schematic diagram
THE EASIEST WAY OF ANALYZING CIRCUIT FLOW OF EVERY COMPONENTS CONVERTED
INTO SYMBOLS
3) draw / place the components on its location to connect
4) as we know that , source part is the beginning or the input portion,
control is at the lower portion of the diagram as well as the power outlet
where the actual location of control switch is above the ground of at least 1,500 mm (
1.5 m ) or 150 cm
where the outlet receptacle is at 30 cm ( 300 mm) or about 12 inches
5) load receptacle / socket is at the above portion of the diagramwhere as the same at
the actual installation
NOTE : SCHEMATIC DIAGRAM IS SQUARE LOOK IN A CLOSE LOOP CIRCUIT CONNECTING
THE REQUIRED COMPONENTS:::
47.
48. ACTIVITY EXERCISES:
A CIRCUIT OF THREE LAMPS (220 V)EACH, SUPPLIED BY 220 V LINE,
CONTROLLED INDIVIDUALLY BY S1 OR SINGLE POLE SWITCH IN THREE
DIFFERENT LOCATION, WITH ONE GANG OUTLET RECEPTACLE
CONTROLLED THE ENTIRE CIRCUIT WITH DOUBLE POLE CIRCUIT
BREAKER...
SCHEMATIC DIAGRAM DRAWING:
CIRCUIT REQUIREMENT:
COMPONENTS : ELECTRICAL SYMBOL
1. 3 LIGHTING RECEPTACLE = OR
LINE 1 RETURN
2. 1 = SPST / SINGLE POLE SW/1 GANG SW. =
LINE 2 RETURN
3. 1 = ONE GANG OUTLET RECEPTACLE =
LINE 1 LINE 2
4. 1 = DOUBLE POLE CIRCUIT BREAKER = LINE 1
LINE 2
49. SEAT WORK EXERCISES:
DRAW THE SCHEMATIC DIAGRAM OF::
THREE LAMP RECEPTACLE
WITH 220 V EACH ,
SUPPLIED BY 220 V LINE,
CONTROLLED BY ONE
THREE GANG SWITCH IN
ONE LOCATION WITH ONE
GANG OUTLET BEFORE
AND AFTER THE LAMP
RECEPTCLE, CONTROLLED
THE ENTIRE CIRCUIT
SYSTEM BY DOUBLE POLE
CIRCUIT BREAKER...
50. LETS DO THE PICTORIAL DIAGRAM
A CIRCUIT OF THREE LAMPS (220 V)EACH, SUPPLIED BY 220 V
LINE, CONTROLLED INDIVIDUALLY BY S1 OR SINGLE POLE
SWITCH IN THREE DIFFERENT LOCATION, WITH ONE GANG
OUTLET RECEPTACLE CONTROLLED THE ENTIRE CIRCUIT WITH
DOUBLE POLE CIRCUIT BREAKER...
NOTE: NO MATERIALS REQUIRED, ONLY CIRCUIT CONNECTION..
CIRCUIT COMPONENTS:
1. = 3 LAMPS RECEPTACLE
2. = 3 S1 / SPST / SINGLE POLE SW
3. = 1 ONE GANG OUTLET RECEPTACLE
4. = 1 DOUBLE POLE CIRUIT BREAKER
51. COMPLETE THE PICTORIAL WIRING CONNECTION WITH LEADS - OUT ON BOXES ( ACTIVITY EXERCISES)
52. SEAT WORK EXERCISES:
DRAW THE PICTORIAL DIAGRAM
OF::
THREE LAMP RECEPTACLE WITH
220 V EACH , SUPPLIED BY 220 V
LINE, CONTROLLED BY ONE
THREE GANG SWITCH IN ONE
LOCATION WITH ONE GANG
OUTLET BEFORE AND AFTER
THE LAMP RECEPTCLE,
CONTROLLED THE ENTIRE
CIRCUIT SYSTEM BY DOUBLE
POLE CIRCUIT BREAKER...
NOTE: NO MATERIALS REQUIRED,
ONLY CIRCUIT CONNECTION..
53. LETS DO THE SINGLE LINE
DIAGRAM:
DRAW THE SINGLE LINE DIAGRAM
OF::
THREE LAMP RECEPTACLE WITH
220 V EACH , SUPPLIED BY 220 V
LINE, CONTROLLED BY ONE
GANG SWITCH INDIVIDUALLY IN
THREE DIFFERENT LOCATION
WITH ONE GANG OUTLET
BEFORE AND AFTER THE LAMP
RECEPTCLE, CONTROLLED THE
ENTIRE CIRCUIT SYSTEM BY
DOUBLE POLE CIRCUIT
54. DRAW THE SINGLE LINE
DIAGRAM OF::
THREE LAMP RECEPTACLE
WITH 220 V EACH ,
SUPPLIED BY 220 V LINE,
CONTROLLED BY ONE
THREE GANG SWITCH IN
ONE LOCATION WITH ONE
GANG OUTLET BEFORE
AND AFTER THE LAMP
RECEPTCLE, CONTROLLED
THE ENTIRE CIRCUIT
SYSTEM BY DOUBLE POLE
CIRCUIT BREAKER...
55. SEAT WORK EXERCISES:
complete the slash / number of
wire conductors;;;
THREE LAMP RECEPTACLE -220 V
EACH, SUPPLIED BY 220 V LINE,
CONTROLLED INDIVIDUALLY BY
SINGLE POLE SWITCH OR S1 IN
THREE DIFFERENT LOCATION,
WITH THREE ONE GANG OUTLET
IN THREE DIFFERENT LOCATION,
CONTROLLED THE ENTIRE
CIRCUIT WITH ONE DOUBLE POLE
CIRCUIT BREAKER...
56. COMBO / COMBINATION CIRCUIT DIAGRAM/
SCHEMATIC/ PICTORIAL/SINGLE LINE DIAGRAM
DRAW THE SCHEMATIC AND PICTORIAL DIAGRAM AND WIRING CONNECTION WITH
LEADS OUT OF THE GIVEN SINGLE LINE DIAGRAM..
