Special Program for Technical Vocational 1ST GENERATION ...bnvhsmodules.com/wp-content/uploads/2020/10/EIM-G9-Q1-M1.pdf · Quarter 1 – Module 1: Principles of Knob and Tube 9 _____

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]



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9

Special Program for

Technical Vocational

Education Industrial Technology

Electrical Installation and

Maintenance NC II

Quarter 1 – Module 1:

Principles of Knob and Tube



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.

.



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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



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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



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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



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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



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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



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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


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.



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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


C. Cueto; Ms. Gina C, delos Santos; Dr. Corazon Echano; and Mr. Lemuel C. Valles, funded by the Department of Education.

ACTIVITY SHEET



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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



S - VERSION 2.0

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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



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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



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ANSWER KEYS



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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



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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] :



S - VERSION 2.0

Documents

Special Program for Technical Vocational 1ST GENERATION ...bnvhsmodules.com/wp-content/uploads/2020/10/EIM-G9-Q1-M1.pdf · Quarter 1 – Module 1: Principles of Knob and Tube 9 _____