DEPARTMENT OF EDUCATION
REGION V
DIVISION OF CAMARINES SUR
Demonstrator: Emma L. Dela Cruz
Date:
DETAILED LESSON PLAN IN TLE (GRADE 7&8 EXPLORATORY)
ELECTRICAL INSTALLATION MANAGEMENT
I.
LEARNING OUTCOMES:
II.
A. Competencies:
 Read and interpret electrical signs, symbols and data
 Analyze electrical components and materials based on electrical signs, symbols
and data
 Read blueprints of electrical plans, diagrams and circuits
 Identify necessary tools, materials and equipment according to blueprints of
electrical plans, diagrams and circuits
B. Objectives:
At the end of the discussion students are expected to:
 Identify the Electrical signs, symbols and abbreviations
 Analyze the electrical component in electrical plans, diagrams and circuits
 Create a simple schematic diagram using the symbols
SUBJECT MATTER/ CONTENT
A. Topic: Electrical Signs, Symbols and Abbreviations
B. Reference:
http://www.depedbataan.com/resources/k_to_12_electrical_learning_module.pdf
http://www.electricalabbreviations/yourdictionary.com
C. Materials: PPT, Chart of Electrical signs, symbols and Abbreviations, Manila paper
D. Content Standard:
 The learner demonstrates an understanding of the concepts and underlying
principles in interpreting simple technical drawings and plan in electrical
installation and maintenance
E. Performance Standard:
 The learner independently reads and interprets specifications of simple technical
drawings and plans
III.
LEARNING ACTIVITY/ LESSON PROCEDURE
A. Daily Routine

Greetings
Good Morning Class!
Good Morning Ma’am.
How are you today?
We’re fine Ma’am.
Good. Always practice proper hygiene
especially nowadays that there are viruses such
as COVID19.
Yes Ma’am.

Checking of Attendance
Class Secretary may I know the status of the
class attendance today?
I’m happy to tell you that all of my
classmates are present today.
Very Good! Very Good! Very Good!
Wow and because of that give yourselves a
Very Good Clap.

Review of the Past Lesson
Before we proceed to our topic, let’s have a
quick recap.
Do you have any idea what’s in the picture?
Ma’am it was series and parallel
circuit.
Very Good. It was the Two types of circuits
which is Series and Parallel.
Again what is the difference between the two?
How about the advantage of Parallel to Series?
Ma’am in series, components is
arranged in a chain, so that the current
has only one path to take. The current
is the same through each load.
While in Parallel, components are
connected across the wires. The
voltage across each load on parallel
circuit is the same.
The advantage of using parallel circuit
is that even if one of the components
fails, still the remaining components
will function.
Very Good!
It seems that you are ready for today’s lesson
B. Lesson Proper

Motivation/ Engagement
I’ve prepared here a song but the lyrics are
incomplete. Will you help me find the missing
lyrics using the clues given?
Song(Tune of PPAP)
I have a _____
I have a _______
Uhhh.. _________
I have a _____
I have a _______
We’ll do Ma’am.
Uhhh.. _________
Electrical ______
Electrical _______
______, _______, ____________
Clues:
NSIGS, LSYMOBS, NABBRVEIATIOS
Ma’am, the first word is SIGNS.
Based on the given clues, what do you think is
the first word?
Very Good!
How about the second word?
Ma’am, SYMBOLS.
Excellent!
And for the final word?
ABBREVIATIONS, Ma’am.
Fantastic!
Now that the lyrics of the song are complete,
let’s try to sing it.
Based on the song that you sang, what do you
think is our lesson for today?
That’s right!




Today’s lesson is all about Electrical Signs,
Symbols and Abbreviations
Here are the objectives in today’s lesson:
Identify the Electrical signs, symbols and
abbreviations
Analyze the electrical component in electrical
plans, diagrams and circuits
Create a simple schematic diagram using the
symbols and abbreviations
Unlocking of terms
Okay now let’s unlock some words that we
might encounter in today’s lesson:
Pictorial Diagram-is a sketch of electrical
circuit that shows the external appearance
of each component. It is much like a
photograph of the circuit and uses simple
images of parts.
Schematic Diagram- is a sketch showing
the components of the circuit using
standard electrical symbols. It shows the
actual number of components and how the
wiring is routed but not the actual location
Abbreviations- a shortened form of a
I have a SIGNS
I have a SYMBOLS
Uhhh.. ABBREVIATIONS
I have a SIGNS
I have a SYMBOLS
Uhhh.. ABBREVIATIONS
Electrical SIGNS
Electrical SYMBOLS
SIGNS, SYMBOLS,
ABBREVIATIONS.
Electrical Signs, Symbols and
Abbreviation Ma’am.
written word
Fixtures- components that are fixed into a
building

Exploration
Now, I will give you a quick activity.
Divide yourselves into three groups
Each group has a given task.
Group 1, kindly read your assigned task.
Group 1
Task given: By the use of Role
playing. Demonstrate what will happen
if the signs are obeyed properly and if
it is disobeyed/disregard.
Group 2, how about your task?
Group 2
Task given: Write the abbreviation of
the given words. Write your answers
on the blank.
And lastly, group 3?
Group 3
Task given: By the use of symbols
present the series and parallel circuit.
I will give you 5 minutes. Your time starts now.
The students will do the group activity.

Explanation
Group 1 will you go in front and present your
assigned task.
Group 1 presents
(In this activity students should act out
on what may happen if the Electrical
Signs are obeyed or disobeyed)
Great Acting Group 1.
Everyone let’s give them Nescafe Clap.
CLAP! CLAP! CLAP!
STOMP! STOMP! STOMP!
YUN OH!
Now let’s proceed to the presentation of Group 2
Group 2 Presentation starts
( Students should explain why they
choose those answers as the
corrected abbreviation for such words)
Great Job Group 2!
Everyone let’s give them WOW Clap!
CLAP! CLAP! CLAP!
STOMP! STOMP! STOMP!
WOW NA WOW!
Now let’s see the presentation of Group 3.
Group 3 presentation starts.
( Students should make a diagram
using the signs with the help of their
arms to connect the symbols)
Great Job Group 3!
Everyone let’s give them Onyok Clap!

CLAP! CLAP! CLAP!
STOMP! STOMP! STOMP!
AYOS!
Elaboration
Thank you class for participating with your group
mates.
Now let’s go back to the work of group 1.
What was their role playing all about?
Where do you usually see these signs and
symbols?
It is about obeying and disobeying
electrical signs.
In laboratory, factories or in any
establishments that uses electrical
machines with high electrical
supply.
Correct!
Is it important to know the different electrical signs
and symbols? Why?
Now, let me show you the different signs and
symbols that help us avoid accidents regarding
electricity.
Yes, because it alerts student,
workers, and visitors to electrical
hazards in area. It helps us avoid
fire and accidents.
Now, let us move to the work of group 2.
You are given a task to write the abbreviation of
the following words. Let see if your answers are
correct.
The teacher will check the answer of group 2.
Have you seen these abbreviations? Where?
Correct!
o
Yes, in batteries, bulb, or in any
electrical devices or components.
Electrical Abbreviations are used
throughout several industries. This include
from automotive and construction to
electrical wiring and electronic devices.
Why do we need to learn about these electrical
abbreviations?
Because we used it to represent the
electric units in small electronic
devices. Because it saves space.
Correct!
Aside from, it can be used to understand
schematic, circuit plan and blue prints.
Example:
Do you have any question?
Based on the presentation of 3rd Group you
noticed that they uses head crown with
symbols on it.
What do you think does symbol represents?
Ma’am I think those symbols
represents a components or electrical
devices.
Very Good!
Where do you usually see those symbols?
That’s right.
Why do you think they use those symbols if
they can use the actual image?
Very Good!
o
Electrical Symbols are small drawings or
pictograms used to represent various electrical
devices/components in a diagram or plan of an
electrical circuit. These symbols are used in
sketching schematic diagrams and electrical
plans for numerous types of electrical works.
It can be seen in schematic diagrams,
electrical plans and circuit plans.
Ma’am because symbols are easily to
draw than the actual image of the
components.
WIRE- also known as the conductor where the
current flows
TERMINAL – wherein the current ends
WIRE CONNECTED- the conductors are
connected
WIRE UNCONNECTED- the conductors only
overlaps and not connected
SWITCH- used to turn on/off the flow of current in
a circuit
FUSE- stops the current flow if overloaded
CIRCUIT BREAKER- stops the current flow if
overloaded
CELL- single unit composed of electrolyte and
electrodes that generates electricity
BATTERY- a group of two or more cell that
generates electricity
BULB/LAMP- lightning device
RESISTOR- control the flow of a current in a circuit
CAPACITOR- store energy/electricity in a circuit
DIODE- act as a rectifier, signal limiters, signal
modulator, signal mixers and oscillator
HORN/SPEAKER- audio signaling device used to
create sounds
BUZZER- audio signaling device used to create
sounds
BELL- audio signaling device used to create
sounds
PUSH BUTTON- a switch device used together
with buzzer, bells and horns
MOTOR- device used to convert mechanical
energy into electrical energy
AMMETER- can measure large amount of current
flowing in a circuit
GALVANOMETER- can measure only small
amount of current flowing in a circuit
WATTMETER- measures the total wattage of a
component
VOLTMETER- measure the amount of a voltage
running in a circuit
SERVICE ENTRANCE- gives entrance of a current
in a household or establishment connected from
the electrical post to the meter
METER- measures the total electric energy
conserved
POWER PANEL BOARD- distribute and divides
the electrical power in establishments with
compose of circuit breakers and fuses
GROUND- wire that is physically connected to
earth
LIGHTNING ARRESTER- protects the insulation
and conductors from the effects of lightning
ANTENNA- device used as a receiver of radio
waves
MALE PLUG- the plug connected to an electrical
device which will be connected to a outlets
INCANDESCENT BULB- component produces
light
FLUORESCENT BULB- component produces light
CONVENIENCE OUTLET- electrical fixtures in
household, establishments and acts as an
electrical source
GANG SWITCHES- electrical fixtures in
household, establishments and acts as the
controller of the component.
I will give some examples.
Now try to look at this pictorial diagram of a
flashlight
Example no. 1
Flashlight has a components of a 12 volts cell, bulb
with 6watts, switch and springs
Example no. 2
A three diode connected to a battery with
resistor and a switch.
Now let’s try to analyze the components in this
electrical plan and count the quantity of each
component.
On your paper try to draw the schematic diagram
of this one:
Schematic Diagram:
And count the quantity of the components/fixtures
in this electrical plan:
Quantity
7 Incandescent Bulb
2 Fluorescent Bulb
4 Single gang switch
1 Two gang switch
1 Three gang switch
2 Single convenience outlet
4 Duplex convenience outlet
1 Range outlet
o
Generalization
I’m sure that you learned many ideas and
knowledge on today’s lesson.
Let’s have a recall.
Again, what are Electrical Signs, Symbols and
Abbreviation?
Why Electrical Signs are important?
How about Electrical Symbols?
And Electrical Abbreviations?
Very Good!
Electrical Signs are signs used in
Electrical works to alert those around
in area to any hazards. Electrical
Symbols are small pictograms used in
schematic diagram and electrical
plans. Electrical Abbreviations are
short term for the electrical units/
devices usually used in Electrical.
Electrical Signs are important because
it notifies/warns person to prevent
injuries, damages, accidents in
hazardous area.
The importance of abbreviation is it
can be easily write in tight spaces it is
also easy to memorize.
Electrical Symbols importance is it
represents components and it is easy
to draw than the actual image.
o
Application
Now that you have enough knowledge.
I’ve prepared here an activity.
Just like earlier you are divided into three
groups.
Exercise no.1
Instructions: Each group must create the
schematic diagram of below.
Schematic Diagram:
Exercise no. 2
Instruction: Each Group must find and analyze
the electrical components/fixtures in this
electrical plan.
Group 1 must find the kind of lightning
components fixed and the quantity of it.
Group 2 must find the kind of outlets fixed and
the number of each.
Group 3 must find the kind of switches fixed
and the number of each.
Quantity
7 Incandescent Bulb
3 Fluorescent Bulb
6 Single gang switch
1 Two gang switch
1 Three gang switch
1 Single convenience outlet
6 Duplex convenience outlet
1 Range outlet
1 Special Outlet
1 Weatherproof outlet
IV.
EVALUATION
A. Directions: Match the Electrical signs and abbreviations in Column A to their
corresponding descriptions in Column B. Write the letter of your answer in the space
provided before each number.
B. Directions: Create the Schematic Diagram using Electrical symbols.
Key to Correction:
A. Answers:
1. C
2. A
3. F
4. E
5. B
V.
B. Answer: (Schematic Diagram)
ASSIGNMENT
1. Analyze your own house wiring plan and try to create its electrical plan using the
symbols learned.
2. Create a schematic diagram of 8 Christmas bulbs in a series circuit with a switch
connected to an AC of 110 volts.
Prepared by:
EMMA L. DELA CRUZ
Teacher 1- Applicant