Republic of the Philippines
Department of Education
National Capital Region
DIVISION OF CITY SCHOOLS – MANILA
Manila Education Center Arroceros Forest Park
Antonio J. Villegas St. Ermita, Manila
ELECTRICAL
INSTALLATION AND
MAINTENANCE 7
1ST Quarter – Module 1 (Week 1)
Prepare electrical materials and tools for
the task
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HOW DO YOU USE THIS MODULE
Before starting the module, I want you to set aside other tasks that will
disturb you while enjoying the lessons. Read the simple instructions below to
successfully enjoy the objectives of this kit. Have fun!
1. Follow carefully all the contents and instructions indicated in every page of this
module.
2. Write on your notebook the concepts about the lessons. Writing enhances
learning, that is important to develop and keep in mind.
3. Perform all the provided activities in the module.
4. Let your facilitator/guardian assess your answers using the answer keycard.
5. Analyze conceptually the posttest and apply what you have learned.
6. Enjoy studying!
PARTS OF THE MODULE
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
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Expectations - These are what you will be able to know after completing the
lessons in the module.
Pre-test - This will measure your prior knowledge and the concepts to be
mastered throughout the lesson.
Brief Introduction- This section will give you an overview of the lesson.
Activities - This is a set of activities you will perform with a partner.
Remember - This section summarizes the concepts and applications of the
lessons.
Check your Understanding- It will verify how you learned from the lesson.
Post-test - This will measure how much you have learned from the entire
module.
LESSON 1
PREPARE ELECTRICAL SUPPLIES, MATERIALS, AND
TOOLS
EXPECTATION:
•
•
•
•
Tools and materials are identified as per job requirement.
Tools are classified according to its function as per job requirement.
Materials are classified according to its uses on a specific project.
Tools and materials are selected.
1
PRE - TEST
Direction: Read the questions carefully and encircle the letter of the correct
answer.
1. This is used for griping, holding, cutting electrical wires and cables and even
small nails. Usually used by linemen in doing heavy tasks.
A. Combination Pliers B. Screwdriver
C. Fuse
D. Switch
2. Used for cutting and holding fine wires. This can reach tight space or small
opening where other pliers cannot reach and also used in making terminal loops
of copper wires.
A. Phillip Screwdriver B. Fuse
C. Long Nose Pliers D. Switch
3. This has a cross tip resembling a positive (+) sign. It is used to drive screws with
cross slot heads.
A. Phillip Screwdriver B. Fuse
C. Long Nose Pliers D. Switch
4. This is tools used in driving or pounding and pulling out nails.
A. Phillip Screwdriver B. Hammer
C. Long Nose Pliers D. Switch
5. A tool used for removing insulation of medium sized wires ranging from gauge
#10 to gauge #16.
A. Hammer
B. Switch
C. Hammer
D. Wire gauge
6. Is a device inserted to a convenience outlet to conduct electric current. A flat
cord is attached to it on one end and the other end is connected to a current
consuming instrument or appliance.
A. Male Plug
B. Utility box
C. Switch
D. Fuse
7. This is a circuit protective device that automatically blows and cut the current
when an overload or short circuit happens.
A. Male Plug
B. Utility box
C. Switch
D. Circuit Breaker
8. This is a rectangular shaped metallic or plastic (PVC) material in which flush
type convenience outlet and switch are attached.
A. Male Plug
B. Utility box
C. Switch
D. Fuse
9. Are electrical materials used as the passage of wires for protection and
Insulation.
A. Conductor
B. Switch
C. Conduit pipes
D. Fuse
10. Are used to attach metallic or non-metallic conduit to the junction or utility
boxes.
A. Male Plug
B. Connector
C. Switch
D. Fuse
BRIEF INTRODUCTION
Electrical work can't be done without the right tools. As basic
tools have been improved over the years and new specialized tools
are developed, the list of tool choices for electricians becomes even
longer. Electrical task can be accomplished systematically to save
time, effort, and resources. Most of the work cannot be done using
bare hands. To do the task, electrical tools or equipment are needed
to perform the job.
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Topic: Prepare Electrical Supplies, Materials, and Tools
Objectives
•
•
•
•
Familiarize with electrical supplies, materials and tools.
Perform each tool according to its uses.
Classify tools according to its specification, uses and function.
Sustain interest in explaining the uses and function of each tools.
LEARNING CONTENT
ELECTIRCAL TOOLS AND EQUIPMENT
Every electrician needs basic hand tools to perform everyday tasks,
Fortunately, today's basics are better than older models, providing more comfort and
safety than their predecessors. Manufacturers have made tools more 'ergonomically
correct,' and improved designs help cut down on hand and wrist injuries often caused
by repetitive movement. Plus, they make it easier to perform the same motion over
and over because the tools just feel more comfortable. While today's designs may
provide more safety and comfort, they're still the basic hand tools electricians have
been using for years.
TOOLS
SCREWDRIVERS
Standard/Flat Screwdriver
USES
blade tip is wedge-shaped and
resembles a negative (-) sign. This is
used to drive screws with a single slot
ahead
Phillips Screwdriver
has a cross tip resembling a positive (+)
sign. This is used to drive screws with
cross slot heads.
Stubby Screwdriver
comes in either Standard or Philips
screwdriver with short shank or blade
and a shorted handle used to turn
screws in tight space where standard
screwdriver cannot be used.
Allen Screwdriver
could be in the shape of a screwdriver
or a wrench. Its function is to drive
screw with hexagonal slot head.
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HAMMERS
Claw Hammer
a hammer with one side of the head
split and curved, used for extracting
nails.
Mallet (rubber head)
a kind of hammer, often made of
rubber or sometimes wood, that is
smaller than a maul or beetle, and
usually has a relatively large head.
a hammer with a rounded end opposite
the face, a type of peening hammer
used in metalworking.
Ballpeen Hammer
PLIERS
Combination Pliers (Lineman’s
Pliers)
This is used for gripping, holding, and
cutting electrical wires and cables and
even small nails. They are usually used
by linemen in doing heavy tasks.
Side Cutting Pliers
Long Nose Pliers
Wire Stripper
type of pliers is used for cutting fine,
medium and big wires and cables.
used for cutting and holding fine wires.
This can reach tight space or small
opening where other pliers cannot
reach and used in making terminal
loops of copper wires.
OTHER HAND TOOLS
A tool used for removing insulation of
medium sized wires ranging from gauge
#10 to gauge #16.
Electrician’s Knife
used by linemen to remove insulation
of wire and cables in low and high
voltage transmission lines.
Portable Electric drill
A small drilling machine with a chuck
capacity of ¼‖ to 3/8‖. It is used in
making holes on metal sheets and
concrete walls.
Hacksaw
tool is used to cut metal conduit and
armored cable.
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Electrical Supplies and Materials
Electrical materials are developed and constructed for a special purpose such as
to:
•
•
•
•
control the flow of current in an electrical circuit;
carry electrical current from the source to the load or current consuming
apparatus;
hold and secure wires to its fixtures inside and outside houses and
buildings; and
protect the houses, buildings, appliances’ and instruments from any
destruction and damage.
Convenience outlet
a device that acts as a convenient
source of electrical energy for current
consuming appliances. It is where the
male plug of an appliance is inserted
and usually fastened on the wall or
connected in an extension cord. It
maybe single, duplex, triplex or
multiplex and could be surface type or
flush type.
Male plug
a device inserted to a convenience
outlet to conduct electric current. A flat
cord is attached to it on one end and
the other end is connected to a current
consuming instrument or appliance.
Lamp holders
devices that hold and protect the lamp
and are also called as ―Lamp
Sockets/Receptacles‖. These come in
many designs and sizes. They are
classified as flush, hanging
(weatherproof/chain) and surface
types.
Switch
a device that connects and disconnects
the flow of electric current in a circuit.
There are many shapes, designs, and
types and they are classified as
hanging, flush, and surface types.
Fuse
a circuit protective device that
automatically blows and cut the
current when and overload or short
circuit happens.
Junction Box
an octagonal shaped electrical material
where the connections or joints of wires
are being done. It is also where the
flush type lamp holder is attached. This
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could be made of metal or plastic (PVC)
Polyvinylchloride.
Circuit Breaker
a protective device used to
automatically blow and cuts the
current when trouble in the circuit
such as short circuit or overload
occurs.
Utility Box
a rectangular shaped metallic or plastic
(PVC) material in which flush type
convenience outlet and switch are
attached.
Flat Cord
Is a duplex stranded wire used for
temporary wiring installation and
commonly used in extension cord
assembly. It comes in a roll of 150
meters and with sizes of gauge # 18
and gauge # 16 awg (American wire
gauge).
Electrical Wire/Conductor
a. Stranded wire which is made of
multiple strands joined together to
make a single wire.
b. Solid wire is made of a single strand
of copper or aluminum wire. These are
used in wiring installation inside and
outside the buildings.
Conduits/Pipes
electrical materials used as the passage
of wires for protection and insulation.
These could be rigid metallic, flexible
metallic conduit (FMC), rigid
nonmetallic (PVC), and flexible nonmetallic or corrugated plastic conduit
(CPC).
Clamps
electrical materials used to hold and
anchor electrical conduits in its proper
position.
Connectors
used to attach metallic or non-metallic
conduit to the junction or utility boxes.
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Activity 1
Crossword: Answer the question below by using the crossword puzzle.
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T
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1. Electrical materials used as the passage of wires for protection and
insulation.
2. Wire which is made of multiple strands joined together to make a single
wire.
3. A rectangular shaped metallic or plastic (PVC) material in which flush type
convenience outlet and switch are attached.
4. A circuit protective device that automatically blows and cut the current
when and overload or short circuit happens.
5. Kind of screwdriver has a cross tip resembling a positive (+) sign.
REMEMBER
In order to protect electrical equipment and personnel, proper electrical
equipment preventive maintenance must be performed. The manufacturer’s
instructions, or industry consensus standards, exist to assist users with
electrical equipment maintenance and testing. When the overcurrent
protective devices are properly maintained and tested for proper adjustments
and operation, equipment damage and arc flash hazards can be limited as
expected.
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CHECK YOUR UNDERSTANDING
Direction: Complete the table below, label each tool or materials and their uses.
PICTURE
NAME OF TOOLS
USES
POST - TEST
Direction: Read the questions carefully and encircle the letter of the correct
answer.
1. This is used for griping, holding, cutting electrical wires and cables and even
small nails. Usually used by linemen in doing heavy tasks.
A. Combination Pliers B. Screwdriver
C. Fuse
D. Switch
2. Used for cutting and holding fine wires. This can reach tight space or small
opening where other pliers cannot reach and also used in making terminal loops
of copper wires.
A. Phillip Screwdriver B. Fuse
C. Long Nose Pliers D. Switch
3. This has a cross tip resembling a positive (+) sign. It is used to drive screws with
cross slot heads.
A. Phillip Screwdriver B. Fuse
C. Long Nose Pliers D. Switch
4. This is tools used in driving or pounding and pulling out nails.
A. Phillip Screwdriver B. Hammer C. Long Nose Pliers D. Switch
5. A tool used for removing insulation of medium sized wires ranging from gauge
#10 to gauge #16.
A. Hammer
B. Switch
C. Hammer D. Wire gauge
8
6. Is a device inserted to a convenience outlet to conduct electric current? A flat
cord is attached to it on one end and the other end is connected to a current
consuming instrument or appliance.
A. Male Plug
B. Utility box
C. Switch
D. Fuse
7. This is a circuit protective device that automatically blows and cut the current
when an overload or short circuit happens.
A. Male Plug
B Utility box
C. Switch
D. Circuit Breaker
8. This is a rectangular shaped metallic or plastic (PVC) material in which flush
type convenience outlet and switch are attached.
A. Male Plug
B. Utility box
C. Switch
D. Fuse
9. Are electrical materials used as the passage of wires for protection and
Insulation.
A. Conductor
B. Switch
C. Conduit pipes
D. Fuse
10. Are used to attach metallic or non-metallic conduit to the junction or utility
boxes.
A. Male Plug
B. Connector
C. Switch
D. Fuse
LESSON 2
COMMON WIRE SPLICES AND JOINTS
EXPECTATION:
•
•
•
•
Tools and materials that will be use in wire splices and joints.
Familiar with the actual application of every splices and joints.
Practicing the splicing of wires.
Essential of knowing spices and joints.
PRE - TEST
Direction: Read the questions carefully and encircle the letter of the correct
answer.
1. Used where the tap wire is under considerable tensile stress circuit.
A. Aerial tap joint
B. Plain tap joint
C. Rat tail joint
D. Y-splice
2. Kind of joint is commonly used to join two or more conductors inside the
junction box. It is suitable for service where there is no mechanical stress when
wires are to be connected in an outlet box, switch, or conduit fitting.
A. Aerial tap joint
B. Plain tap joint
C. Rat tail joint
D. Y-splice
3. Is used as a temporary tap usually done in constructions sites. The easy twist
will facilitate tap wire movement.
A. Aerial tap joint
B. Plain tap joint
C. Rat tail joint
D. Y-splice
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4. A two-tap wire turned simultaneously and is used where the two-tap wire is
under heavy tensile stress.
A. Aerial tap joint
B. Plain tap joint C. Rat tail joint D. Duplex Cross
joint
5. This is used where the tap wire is under heavy tensile stress.
A.
Aerial tap joint B. Knotted tap C. Rat tail joint D. Duplex Cross joint
LOOKING BACK TO YOUR LESSON
Direction: Fill in the blank identify electrical supplies, tools and materials.
_____________1.
_____________3.
_______________2.
______________4.
_____________5.
BRIEF INTRODUCTION
As a student in Electrical Installation and Maintenance you
should acquire the important knowledge and skills in wire splices
and joints and should be familiar with the actual application of every
splice and joint. This will serve as your tool in performing actual
wiring installation. Of course, another factor is the knowledge in
interpreting and analyzing the wiring diagram especially if the circuit
is complicated.
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Topic: Perform Wire Splices and Joints
Objectives
•
•
•
•
•
Familiarize with different splices and joints.
Perform different wire splices and joints.
Follow safety precautions.
Sustain interest in explaining the importance of each splices and joints.
Sustain interest in explaining the uses and function of each tools.
LEARNING CONTENT
COMMON WIRE SPLICES AND JOINTS
When creating circuits and wiring devices at home, you may need to create
wire joints and splices. There are a variety of kinds of splices and joints in wire. A
good wire splice or joint will be secure even before soldering. The soldering can act
as an extra securing method and prevents corrosion in the joint. Splices and joints
in solid wire should also be covered with electrical tape for safety.
When working with electricity, it's important to be extremely careful. These
wire splicing techniques are broadly the same for low voltage wiring of consumer
electronics and the AC power supply to your home. When splicing wires, it's very
important to bear in mind the risks, especially if you're working on something with
high voltage. Make sure power is off, including the fuse, wear gloves, never work near
water and always double check your work before turning the electricity back on.
WIRE SPLICES AND JOINTS
ACTUAL SPLICES AND JOINTS
DESCRIPTION
Rat Tail or Pig Tail - kind of joint is
commonly used to join two or more
conductors inside the junction box. It
is suitable for service where there is no
mechanical stress when wires are to be
connected in an outlet box, switch, or
conduit fitting.
Y-splice - method of wrapping is
generally used on small cables because
the strands are flexible, and all can be
wrapped in one operation.
Knotted tap- This is used where the
tap wire is under heavy tensile stress.
11
Plain tap joint - used where the tap
wire is under considerable tensile
stress circuit.
Aerial tap - is used as a temporary
tap usually done in constructions sites.
The easy twist will facilitate tap wire
movement.
Duplex cross joint - a two-tap wire
turned simultaneously and is used
where the two-tap wire is under heavy
tensile stress.
Western Union Short-tie Splice. This
is the most widely used splice or joint
in interior wiring installation to extend
the length of wire from one point to
another.
Western Union Long Tie-This is used
extensively for outside wiring to extend
the length of wire from one end to
another.
Cross joint- The same application is
done as in plain tap and the only
difference is that this tap is a
combination of two plain taps place
side by side with each other.
Wrapped Tap or Tee Joint- This is
used on large solid conductors where it
is difficult to wrap the heavy tap wire
around the main wire.
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Activity 1
SPLICING OF WIRES
Direction: Practice doing the task by following the steps given. Your performance
will be judged using the rubric: Perform at least 5 wire joints.
Can also see the procedure in this link:
https://www.youtube.com/watch?v=yScMj9gBWG4&t=21s
SKINNING OF WIRE USING DIFFERENT TOOLS AND EQUIPMENT
Performance Rubrics:
CRITERIA
Accuracy
Workmanship
Proper
handling of
tools
Speed
Legend:
1
1 – Poor 2 – Fair
SCALE
4
3
2
1
SAFETY PRECAUTIONS
1.
2.
3.
4.
5.
2
3 – Good
3
4
4 - Excellent
DESCRIPTION
Excellent
Good
Fair
Poor
POINTS
93-100
86-92
79-85
78 and below
Never take shortcuts on procedures
Be aware of your surroundings
Use the right tool at the right job.
Report unsafe conditions
Always wear personal protective equipment
REMEMBER
ALWAYS FOLLOW SAFETY PRECAUTIONS!
The connections must be well made, and the wires tightly joined to
prevent a loss of voltage to the device powered. In high current situations a
poor connection causes heat at the connection and oxidization of the wires
and no more or intermittent connections.
13
Activity 2
MAKING EXTENSION CORD
An extension cord is a span of flexible electrical power cable with a plug on
one end and multiple sockets on the other end. It comes in several varieties to suit
the needs of the user. One of the most important considerations is the power
handling capacity to make it safe and functional. Electrical gadgets are product of
modern technology to make our life better. The number of electrical gadgets available
at home and in offices may exceed the existing convenience outlet installed in every
room. The best remedy to address the insufficiency of available outlet is to use an
extension cord especially if the electrical gadgets need to operate at the same time.
I.
II.
III.
IV.
V.
VI.
Name of Project
Objective
a. Demonstrate how to make an extension cord.
b. Observe safety measures while doing the project.
Sketch/Drawing:
IV. Materials Needed:
Tools and Equipment Needed:
Procedure:
NOTE:
You
can
watch
the
procedure
link https://www.youtube.com/watch?v=_BPoa3wiLVs
on
CHECK YOUR UNDERSTANDING
Direction: Fill in the blanks. Identify the different wire splices and joints below.
_______________________1.
_______________________2.
_______________________3.
_______________________4.
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this
_____________________5.
POST - TEST
Direction: Read the questions carefully and encircle the letter of the correct
answer.
1. Used where the tap wire is under considerable tensile stress circuit.
A. Aerial tap joint
B. Plain tap joint
C. Rat tail joint
D. Y-splice
2. Kind of joint is commonly used to join two or more conductors inside the junction
box. It is suitable for service where there is no mechanical stress when wires are
to be connected in an outlet box, switch, or conduit fitting.
A. Aerial tap joint
B. Plain tap joint
C. Rat tail joint
D. Y-splice
3. Is used as a temporary tap usually done in constructions sites. The easy twist
will facilitate tap wire movement.
A. Aerial tap joint
B. Plain tap joint
C. Rat tail joint
D. Y-splice
4. A two-tap wire turned simultaneously and is used where the two-tap wire is
under heavy tensile stress.
A. Aerial tap joint
B. Plain tap joint C. Rat tail joint D. Duplex Cross
joint
5. This is used where the tap wire is under heavy tensile stress.
A. Aerial tap joint B. Knotted tap C. Rat tail joint D. Duplex Cross joint
15
REFERENCE:
• k_to_12_electrical_learning_module
• https://gltnhs-tle.weebly.com/lesson-12.html
Acknowledgements
Writer: Christian P. Calma
Editors: Ariel D. Tosio EPS,
Reviewer: Amelito Caras and Anthony H. Ducta
Management Team: Maria Magdalena M. Lim-Schools Division
Superintendent-Manila, Aida H. Rondilla-Chief Education Supervisor
Lucky S. Carpio-EPS and Lady Hannah C Gillo, Librarian II-LRMS
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