9/10
TLE–IA-EIM
Quarter 2 – Module 1A
Interpret Electrical Wiring Plan
TLE-IA-EIM–Grade 9/10
Alternative Delivery Mode
Quarter 2 – Module 1A: Interpret Electrical Wiring Plan
First Edition, 2020
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Published by the Department of Education
Secretary: Leonor Magtolis Briones
Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writer: Arnold B. Bad-an
Editor: Howel Jay M. Caluyo
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Typesetter: Arnold B. Bad-an
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Elmar L. Cabrera
Nilita R. Ragay, Ed.D.
Antonio B. Baguio Jr., Ed.D.
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9/10
TLE-IA-EIM
Quarter 2 – Module 1A
Interpret Electrical Wiring Plan
ii
What I Need to Know
This module consists of one (1) learning competency. The learning
competency will be achieved through the learning activities supported by
instruction sheets. Before you read the information sheet or the lesson and What Is
It, answer the pre-test or What I Know, assessment and do the activities provided to
assess yourself and for your teacher to determine that you have acquired the
knowledge necessary to perform the skill require in this learning competency.
After going through this module, you are expected to:
1. Identify the different common electrical symbols;
2. Draw the different electrical symbols; and
3. Appreciate and value the importance of the different electrical symbols in the
Electrical Wiring Plan.
1
What I Know
Let us determine how much you already know about common electrical
symbols by answering the questions below. Use your activity notebook for your
answers.
Matching Type
Directions: Match the electrical symbol in column B with the correct description
in column A. Write the letter of your choice on your activity notebook
______ 1. Conductor/wire
A.
______ 2. Circuit Breaker
B.
______ 3. Fuse
C.
______ 4. Voltmeter
D.
______ 5. Switch
E.
F.
2
Lesson
1
Common Electrical Symbols
Basic electrical symbols represent earth the electrode, cell, ideal source,
battery, source, resister, etc. These symbols help create accurate diagrams and
documentation.
Electric circuits, whether simple or complex, can be the described in a
variety of ways. An electric circuit can be described with mere words; however, a
simple and visual way to describe an electrical circuit should be diagramming it
using basic electrical symbols.
What’s In
In preparation for the wiring plan interpretation, you must have a good
background on the common electrical symbols. Before going through in this
module, try to examine the following questions:
Why is it important to familiarize electrical symbols?
What are the things to be considered when interpreting an electrical wiring
plan?
Notes to the Teacher
Let the learners to read and understand the learning objectives.
Before going through this module, answer the questions in What I
Know and refer to the answer key for corrections. Do the different
tasks: What’s New, What’s More, What I have Learned, What I can DO,
and the additional activities. Finally, answer the assessment and refer
to the answer key for correction. After doing all the tasks, the teacher
will inform the learner for his/her progress.
3
What’s New
Description
Symbol
Meaning
Connects components and passes
current easily from one part of a circuit
to another.
A 'blob' should be drawn where wires
are connected (joined), but it is
sometimes omitted. Wires connected at
'crossroads'
should
be
staggered
slightly to form two T-junctions, as
shown on the right.
In complex diagrams it is often
necessary to draw wires crossing even
though they are not connected. The
simple crossing on the left is correct
but may be misread as a join where the
'blob' has been forgotten.
Supplies electrical energy. A battery is
more than one cell. The larger line is
positive (+). The smaller is negative ( - ).
Conductor or Wire
Wires Joined
Wires not joined
Cell / Battery
A connection to earth. For some
electronic circuits this symbol is used
for the 0V (zero volts) of the power
supply, but for mains electricity and
some radio circuits it really means the
earth. It is also known as ground.
A transducer which converts electrical
energy to light. This symbol is used for
a lamp which is an indicator, for
example a warning light on a car
dashboard.
Earth (Ground)
Lamp (Indicator)
Motor
A transducer which converts electrical
energy to kinetic energy (motion).
Switch
Allows current to flow only when the
button is pressed.
Bell
A transducer which converts electrical
energy to sound.
4
What is It
Common Electrical Symbols
This is not a definitive list of all symbols used in electrical identification, but
merely a guide to some of the more commonly used symbols. Due to the number of
variants used, there may have several symbols in this reference chart for the same
type of equipment - these can vary dependent upon drawing package used. It is
important to note that exact reference should always be sought from drawing
producer to avoid errors.
5
What’s More
Task 2: Crossword Puzzle
Instruction: Fill in the crossword puzzle with the name of electrical symbol below.
Use your activity notebook for your answers.
1.
4.
2.
5.
3.
6.
CROSSWORD PUZZLE
2
3
1
5
6
C
S
4
T
R
T
E
6
What I Have Learned
Instruction: Draw in your activity notebook the following electrical symbols:
1. Ammeter
_____________________________
2. Voltmeter
_____________________________
3. Circuit Breaker
_____________________________
4. Switch
_____________________________
5. Fuse
_____________________________
Assessment
A. Multiple Choice
Directions: Read, analyze and understand each question carefully for each item.
Write the letter of your answer on your activity notebook.
1. What do you call a transducer which converts electrical energy to sound?
A. Switch
B. Bell
C. Buzzer
D. Motor
2. What do call a transducer which converts electrical energy to light?
A. Lamp
B. Bell
C. Buzzer
D. Motor
C. Wire
D.Bell
3. _________ also known as ground.
A. Earth
B. Battery
4. _________ connects components and passes current easily from on part of a
circuit to another.
A. Earth
B. Battery
C. Wire
D. Buzzer
5. What do you call a transducer which concerts electrical energy to sound?
A. Motor
B. Bell
C. Lamp
7
D. Battery
B. Matching Type
Directions: Match the electrical symbol in column B with the correct description in
column A. Write the letter of your choice on your activity notebook
______ 1. Wires not joined
A.
______ 2. Wire
B.
______ 3. Fuse
C.
______ 4. Wires joined
D.
______ 5. Switch
E.
F.
8
9
What’s more
1. AMMETER
2. SWITCH
3. FUSE
4. CIRCUIT BREAKER
5. CONDUCTOR
6. CELL
What I Know
1. C
2. E
3. D
4. F
5. A
Assessment
1.
2.
3.
4.
5.
C
A
A
C
A
B.
1. E
2. C
3. D
4. F
5. A
Answer Key
References
Cabusora, Roman A. and Cueto, Marino C. Electrical Installation and Maintenance;
Prinpia Co., Ltd. 2014
Azares, Efren F. and Recana, Cirilo B. Practical Electricity III; Adriana
Publishing: 1999.
Fajardo, Max P. and Fajardo, Leo B. Electrical Layout and Estimates.
Richter, Herbert P. and Schwan, Creighton W. Practical Electrical Wiring:16th
Edition.
Agpaoa, Feleciano. Interior and Exterior Wiring Troubleshooting; National
Bookstore: 1991.
https://www.scribd.com/presentation/333818252/Electrical-Wiring-Plan
https://www.edrawsoft.com/electrical-symbols.html
https://www.edrawsoft.com/how-to-read-electrical-drawing.html
https://www.google.com/search?q=electrical+symbols+cell&tbm=isch&ved=2ahUKE
wiC5fWW37LrAhW7zYsBHX-nBugQ2-cCegQIABAA#imgrc=15lnTqxyRRlYvM
https://www.engineeringbookspdf.com/basic-electrical-symbols-and-theirmeanings/
https://electronicsclub.info/circuitsymbols.htm
https://www.reconelectrical.co.uk/image/data/pdfs/Electrical%20Symbols%20Guid
e.pdf
For inquiries or feedback, please write or call:
Department of Education – Schools Division of Negros Oriental
Kagawasan, Avenue, Daro, Dumaguete City, Negros Oriental
Tel #: (035) 225 2376 / 541 1117
Email Address: negros.oriental@deped.gov.ph
Website: lrmds.depednodis.net