Special Program for Technical Vocational 1ST GENERATION...
Transcript of Special Program for Technical Vocational 1ST GENERATION...
1
Special Program for
Technical Vocational
Education Industrial Technology
Electrical Installation and
Maintenance NC II
Quarter 1 – Module 1:
Principles of Knob and Tube
9
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
2
Special Program for Technical Vocational Education Grade - 9
Alternative Delivery Mode
Quarter1 - Module1: Principles of Knob and Tube
First Edition, 2020
Republic Act 8293 section 176 states that: No copyright shall subsist in any work of the Government of the Republic of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for the exploitation of such work for a profit. Such an agency or office may, among other things, impose as a condition the payment of royalties. Borrowed materials (i.e., songs, stories, poems, photos, brand names, trademarks, etc.) included in this book are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education Secretary: Leonor Magtolis Briones Undersecretary: Diosdado M. San Antonio
DEVELOPMENT TEAM OF THE MODULE
Writer : Andrez Melchor G. Zozobrado
Editor : Jose Garry R. Napoles
Reviewers : Analogie D. Destacamento
Chito R. Villacampa
Illustrator : Maribell J. Fuentes
Layout Artist : Maribell J. Fuentes
Management Team:
Schools Division Superintendent : Marilyn S. Andales
Assistant Schools Div. Superintendent : Leah B. Apao
Cartesa M. Perico
Ester A. Futalan
Chief Education Supervisor, CID : Mary Ann P. Flores
Education Program Supervisor, LRMDS : Isaiash T. Wagas
Education Program Supervisor, TLE : Jose Garry R. Napoles
Department of Education – Regional Office 7
Division of Cebu Province
Office Address : IPHO Bldg., Sudlon, Lahug, Cebu City, Philippines
Telefax : (032) 520-3216 – 520-3217; SDS Office: (032) 255 - 6405
E-mail Address : [email protected]
Bitoon National Vocational High School
Address : Bitoon, Dumanjug, Cebu
Telephone : (032) 471-8001
E-mail Address : [email protected]
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
3
9
Special Program for
Technical Vocational
Education Industrial Technology
Electrical Installation and
Maintenance NC II
Quarter 1 – Module 1:
Principles of Knob and Tube
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
i
Key Message
For Educators:
Learning is a constant process. Amidst inevitable circumstances, the Department of
Education extends its resources and looks for varied ways to cater to your needs and to
adapt to the new system of Education as a fortress of the Learning Continuity Plan. One of
the probable solutions is the use of Teacher-Made Educational Modules in teaching.
You are reading the Electrical Installation and Maintenance for Grade 9: First
Quarter Alternative Delivery Mode (ADM) Module on “Principles of Knob and Tube” as
written and found in the Competency-Based Curriculum – Strengthened Technical-
Vocational Education Program.
The creation of this module is an effort of competent trainers from Bitoon National
Vocational High School of the Department of Education-Cebu Province during this
pandemic period. In addition, this module is meticulously planned, organized, checked, and
verified by knowledgeable educators to assist you in imparting the lessons to the learners
while considering the physical, social, and economic restraints in the teaching process.
The use of the Teacher-Made Educational Module aims to surpass the challenges of
teaching in a new normal education set-up. Through this module, the students are given
independent learning activities, which embodies in the Most Essential Learning
Competencies based on the K-12 Curriculum Competencies, to work on in accordance with
their capability, efficiency, and time. Thus, helping the learners acquire the prerequisite 21st
Century skills needed with an emphasis on utmost effort in considering the whole well-being
of the learners.
As the main source of learning, it is your top priority to explain clearly how to use this
module to the learners. While using this module, learner’s progress and development should
be recorded verbatim to assess their strengths and weaknesses while doing the activities
presented independently in the safety of their homes. Moreover, you are anticipated to
persuade learners to comply and to finish the modules on or before the scheduled time.
For the Learners:
As a significant stakeholder of learning, the Department of Education researched and
explored innovative ways to address your needs with high consideration on social,
economic, physical, and emotional aspects of your well-being. To continue the learning
process, DepEd comes up with an Alternative Delivery mode of teaching using Teacher-
Made Educational Modules.
You are reading Electrical Installation and Maintenance for Grade 9: First
Quarter Alternative Delivery Mode (ADM) Module on “Principles of Knob and Tube” as
written and found in the Competency-Based Curriculum – Strengthened Technical-
Vocational Education Program.
.
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
ii
This module is specially crafted for you to grasp the opportunity to continue learning
even at home. Using guided and independent learning activities, rest assured that you will
be able to take pleasure as well as to deeply understand the contents of the lesson
presented, recognizing your capacity and capability in acquiring knowledge.
This module has the following parts and corresponding icons:
LEARNING OUTCOME
The first part of the module will keep you
on track on the Competencies,
Objectives, and Skills expected for you to
be developed and mastered. Some
reminders about the module are found in
here too.
This part aims to check your prior
knowledge of the lesson to take. If you
can get a perfect score and perform
competently the competency, you can
skip the module and proceed to the next
module. If not, continue to the next part.
This part helps you link the previous
lesson to the current one through a short
exercise/drill.
A brief discussion of the lesson can be
read in this part. It guides and helps you
unlock the lesson presented.
A comprehensive activities for
independent practice is in this part to
solidify your knowledge and skills of the
given topic. This can be a drill or
exercise or an activity.
This part of the module is used to
process your learning and understanding
of the given topic. It can be a series of
questions or an activity.
A transfer of newly acquired knowledge
and skills to a real-life situation is present
in this part of the module. This can be a
task sheet (used when doing simple
tasks), operation sheet (used when doing
or operating devices or a job sheet (used
in doing series of task for a specific job).
GENERALIZATION
REVIEW LESSON
INFORMATION SHEET
ACTIVITY SHEET
PERFORMANCE TASKS
PRE - ASSESSMENT
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
iii
This activity assesses your level of
mastery towards the topic.
This contains answers to all activities in
the module.
At the end of this module you will also find:
In using this module, keep a note of the fundamental reminders below.
1. The module is government-owned. Handle it with care. Unnecessary marks
are prohibited. Use a separate sheet of paper in answering all the given
exercises.
2. This module is organized according to the level of understanding. Skipping
one part of this module may lead you to confusion and misinterpretation.
3. The instructions are carefully laden for you to understand the given lessons.
Read each item cautiously.
4. This is a Home-Based class; your reliability and honor in doing the tasks and
checking your answers are a must.
5. This module helps you attain and learn lessons at home. Make sure to
comprehend the first activity before proceeding to the next one.
6. This module should be returned in good condition to your teacher/facilitator
once you completed it.
7. Answers should be written on a separate sheet of paper or notebook
especially prepared for TVE subjects.
If you wish to talk to your teacher/educator, do not hesitate to keep in touch with
him/her for further discussion. Know that even if this is a home-based class, your teacher is
only a call away. Good communication between the teacher and the student is our priority to
flourish your understanding of the given lessons.
We do hope that in using this material, you will gain ample knowledge and skills for
you to be fully equipped and ready to answer the demands of the globally competitive world.
We are confident in you! Keep soaring high!
References Printed in this part is a list of all reliable and valid
resources used in crafting and designing this module.
SELF – CHECK
ANSWER KEYS
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
1
Good day d
Good day, dear learner!
This module is solely prepared for you to access and to acquire lessons befitted in
your grade level. The exercises, drills and assessments are carefully made to suit your level
of understanding. Indeed, this learning resource is for you to fully comprehend the
Principles of Knob and Tube independently, you are going to go through this module
following its proper sequence. Although you are going to do it alone, this is a guided lesson
and instructions/directions on how to do every activity is plotted for your convenience.
Using this learning resource, you are ought to Principles of Knob and Tube as
inculcated in the Competency-Based Curriculum – Strengthened Technical-Vocational
Education Program.
This module is composed of set of instructions for you to be guided in the activities
that you will perform later. Read and follow instructions properly, do not skip any parts and
perform each activity honestly. This module is intended for you finish within a week.
At the end of this module, you are expected to achieve the following objectives:
Explain the principles of knob and tube in line with the job requirements.
Illustrate the schematic diagram using knob and tube.
Display responsibility and accountability by all times.
Display concern for others.
Directions: Write TRUE if the statement is correct and FALSE if the statement is not correct.
Write your answer on a separate sheet of paper.
1. Split knobs are used to support wires smaller than No. 12.
2. The exposed knob and tube wiring method, the distance between conductors should
be maintained of 6cm.
3. The knob and tube are not used in temporary installation in construction jobs.
4. It is economical when properly installed.
5. Hammer it in applying pressure on the gimlet when driving it to the wood board.
6. Oiled regularly the auger brace especially the ratchet type.
7. Appropriate screw driver are used for the screw.
8. The conductors in contact with the wiring surface are enclosed in mica tubing.
LEARNING OUTCOME
PRE- ASSESSMENT
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
2
9. Never asked the teacher to check your work before testing.
10. The safety switch is on before making any connection.
Directions: Enumerate the at least 5 safety reminders when installing knob/tube wiring and
also 3 advantages of using it. Write your answer on a separate sheet of paper.
Safety reminders when installing Knob and Tube wiring:
1.
2.
3.
4.
5.
Advantages of the Knob and Tube wiring:
6.
7.
8.
PRINCIPLES OF KNOB AND TUBE
The open or exposed wiring method is sometimes referred to as the Open Wiring on
Insulators. (PEC section 212) It uses cleats, knobs (split or solid), porcelain tubes and mica
tubing for the support and protection of insulated conductors run in or on buildings. It may be
used in working either outside or inside building in dry or wet locations. It shall not be used in
the following locations:
1. Commercial Garages 2. Theaters 3. Motion Picture Studios 4. Hoist ways 5. Hazardous Locations
REVIEW LESSON
INFORMATION SHEET
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
3
In the open or exposed wiring method, the wires are visible and are supported by the
knobs. These knobs may be a split or solid type. This is shown in figure 1.
Figure1. The Split and Solid knobs
Split knobs are used to support wires smaller than No. 8. Solid knobs are used to
support or anchor wires as big as No. 8 or even bigger. Screws or nails may be used to
fasten the knobs. When a nail is used a leather washer should be placed between the nail
head and the insulator to form cushion and protect the insulator from breaking. See figure 2.
Figure 2.The Solid Knob with Leather washer for Protection
Disclaimer: The contents above are borrowed from STVEP CBC CBLM 2008 – Electrical Installation and Maintenance (EIM) made by Mr. Marino
C. Cueto; Ms. Gina C, delos Santos; Dr. Corazon Echano; and Mr. Lemuel C. Valles, funded by the Department of Education. Sources are found
in the reference part of the module
Height of Knob
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
4
Figure 3.Shows the correct and wrong ways of tying wires to the groove of a solid
knob.
In installing an electrical wiring system with the exposed knob and tube wiring method, the
distance between conductors should be maintained at a minimum distance of 6 cm. (2 ½
inches) apart. The knobs must have a 30 cm (1 foot) distance apart. Figure 4 illustrates this
provision of PEC.
Figure 4.Spacing of Split Knobs and Conductors
Whenever wires pass through studs, rafters, floor joists or any wooden part of a
building, the wires are inserted in porcelain tubes or flexible mica tubing. Porcelain tubes and
mica tubing are also provided whenever wires cross each other. It gives the wire extra
protection from injury.
Figure 5 Application of Porcelain Tubes and Mica Tubing
Disclaimer: The contents above are borrowed from STVEP CBC CBLM 2008 – Electrical Installation and Maintenance (EIM) made by Mr. Marino
C. Cueto; Ms. Gina C, delos Santos; Dr. Corazon Echano; and Mr. Lemuel C. Valles, funded by the Department of Education.
30 cm. 1Ft
Ft.
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
5
Some advantages of the Knob and Tube wiring:
1. It is used in temporary installation, such as construction jobs.
2. It has economical when properly installed.
3. It has a lower operating temperature because of ventilation brought by distances of
the installation.
Safety reminders when installing knob and tube wiring
1. Apply enough pressure on the gimlet when driving it to the wood board. Never
hammer it.
2. Have the auger brace oiled regularly especially the ratchet type.
3. Have your electrician’s knife sharpened enough in order not to nick the wire.
4. Use the appropriate screw driver for the screw.
5. Be sure that the conductors in contact with the wiring surface are enclosed in mica
tubing.
6. Be sure that your teacher has checked your work before testing.
7. Be sure that the safety switch is off before making any connection. Apply tape on all
joints/splices.
8. Do not drive the split-knobs completely before the conductors or wires are run or
inserted along the grooves of the knobs.
9. Be sure to test the insulation for short and ground circuit before putting on the power.
A. Directions: Locate and box the different electrical important terms in installing using
knob/tube wiring. Write your answer on a separate sheet of paper.
Q W E R T Y U I O P A S D G F
A S I V D S A E Q R T Y U I P
S D C U L O V R E S A F E T Y
C X A R M O R H I C B T B N N
O C D A E A S D F A I T H O B
N Z O K Z W K G J N L M B H V
D C G C O P E R N I C U C O R
U V K E P L P T U G G E H P F
C V E X V Z L B H O O T E E S
T B G I E H O N E R N G D N D
O G J A H N E T A U K V U M P
R D B S K M R D S A L D O V O
S B S C V B B M K T U B E F I
M N B E P L L C A S S F G U H
G E F G H J M I N J U O O P R
Disclaimer: The contents above are borrowed from STVEP CBC CBLM 2008 – Electrical Installation and Maintenance (EIM) made by Mr. Marino
C. Cueto; Ms. Gina C, delos Santos; Dr. Corazon Echano; and Mr. Lemuel C. Valles, funded by the Department of Education.
ACTIVITY SHEET
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
6
Terms:
1. KNOB
2. TUBE
3. SCREW
4. CONDUCTORS
5. SAFETY
B. Directions: Draw the Solid Knob and the Split Knob. Use a separate sheet of paper.
1. SOLID KNOB
2. SPLIT KNOB
Rubrics:
Excellent (4) Good (3) Satisfactory
(2)
Needs
Improvement
((1)
Following
Project
Direction
all directions were
followed
you followed
most
directions
you followed
some
directions
none of the
directions were
followed
Use Of
Creativty
you used your own
ideas and imagination
as reflected on you
observation/comments
you used
your own
ideas most
of the time
you used
some
imagination
you did not use
your own
ideas/imagination
Effort Put
Into
Project
you took your time
and work hard on the
project
you worked
hard for
most of the
time
you put a
small effort
into the project
you rushed
through and did
not work hard
``
Directions: Read and understand each item carefully. Write a 2-3 sentences possible for
the item that needs opinion or idea. Write your answer on a separate sheet of
paper.
1. How does knob and tube wiring?
GENERALIZATION
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
7
2. How dangerous is knob and tube wiring?
3. Can knob and tube wiring be used with circuit breakers?
4. Which wire is hot on knob and tube?
5. What are the advantages in using knob and tube wiring?
Rubrics:
Criteria Score Rate
Exceptionally clear, thorough and comprehend explanation. 4
Generally clear and substantial explanation. 3
Lacks of clarity, partial or not comprehensive explanation. 2
Unclear, misunderstanding or serious misconception on the explanation. 1
DIRECTIONS: Write the procedure of installing one bulb controlled by one single pole single
throw switch in one location. Write your answer on separate sheet of paper.
Rubrics:
Criteria Score Rate
Exceptionally clear, procedure. 4
Generally clear and substantial procedure. 3
Lacks of clarity, partial or not comprehensive procedure. 2
Unclear, misunderstanding or serious misconception on the procedure. 1
Directions: Draw the schematic diagram of the following. Write your answer on a separate
sheet of paper.
1. Installing two bulbs controlled individually by two single pole switch in two locations.
2. Installing one bulb, controlled from two location by two-3-way switch.
SELF – CHECK
PERFORMANCE TASKS
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
8
Rubrics:
Excellent (4) Good (3) Satisfactory
(2)
Needs
Improvement ((1)
Following
Project
Direction
all directions were
followed
you followed
most
directions
you followed
some
directions
none of the
directions were
followed
Use Of
Creativty
you used your own
ideas and imagination
as reflected on you
observation/comments
you used
your own
ideas most
of the time
you used
some
imagination
you did not use
your own
ideas/imagination
Effort Put
Into Project
you took your time
and work hard on the
project
you worked
hard for
most of the
time
you put a
small effort
into the project
you rushed
through and did
not work hard
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
9
ANSWER KEYS
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
10
REFERENCES
Johnston, Larry et.al., Better Homes and Gardens Wiring 1st Edition, Meredith Books; 2007,pp.
Mulin, R.C., Smith R.L. Electrical Wiring-Commercial, Six Ed., New York:
Delmar’s Publishing Inc.; 1984, pp.
Agpoa, Feleciano. Interior and Exterior Wiring Troubleshooting ; National
Bookstore: 1991
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0
11
For inquiries or feedback, please write or call: Department of Education: DepEd-Cebu Province Office Address : IPHO Bldg., Sudlon, Lahug, Cebu City, Philippines Telefax : (032) 520-3216 – 520-3217; SDS Office: (032) 255 - 6405 E-mail Address : [email protected] Bitoon National Vocational High School Office Address : Bitoon, Dumanjug, Cebu Telefax : (032) 471-8001 E-mail Address : [email protected] :
________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV
1ST GENERATION MODULE
S - VERSION 2.0