4_final Competency Based Learning Materials 2s4w4o

COMPETENCY BASED LEARNING MATERIAL

Sector

: CONSTRUCTION

Qualification Title 11

: ELECTRICAL INSTALLATION AND MAINTENANCE NC

Unit of Competency : PERFORM ROUGHING-IN ACTIVITIES FOR COMMUNICATION AND DISTRIBUTION Module Title : PERFORMING ROUGHING-IN ACTIVITIES FOR COMMUNICATION AND DISTRIBUTION

Technical Education and Skills Development Authority LANAO NORTE NATIONAL AGRO-INDUSTRIAL SCHOOL BUALAN, TUBOD, LANAO DEL NORTE

HOW TO USE THIS COMPETENCY – BASED LEARNING MATERIALS Welcome! The unit of competency “Perform Roughing-in Activities for Communication and Distribution.” A course which comprises the knowledge, skills and attitudes required for a Certificate level 11 in Electrical Installation and Maintenance trainer to possess. The module, Performing Roughing-in Activities for Communication and Distribution, contains training materials and activities related to identifying learner’s requirements, preparing session plan, preparing basic instructional materials and organizing learning and teaching activities for you to complete. In this module, you are required to go through a series of learning activities in order to complete each learning outcome. In each learning outcome are Information Sheets, Self-Checks, Operation Sheets and Task/Job Sheets. Follow and perform the assistance from your trainer. to:  

 





Work through all the information and complete the activities in each section. Read information sheets and complete the self-check. Suggested references are included to supplement the materials provided in this module. Most probably, your trainer will also be your supervisor or manager. He is there to you and show you the correct way to do things. You will be given plenty of opportunities to ask questions and practice on the job. Make sure you practice your skills during regular work shifts. This way, you will improve your speed, memory and your confidence. Use the Self-Checks, Operation Sheets or Task or Job Performance at the end of each section to test your own progress. Use the Performance Criteria Checklist or Procedural Checklist located after the sheet to check your own performance. When you feel confident that you have had sufficient practice, ask your Trainer to evaluate you. The results of your assessment will be recorded in your Progress Chart and Accomplishment Chart.

You need to complete this module before you can perform the next module, Install wiring devices for floor and ground fault current interrupting outlets.

CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution

Date Developed: May 1, 2015 Date Revised: May 1, 2016

Revised By: Jonard A. Mamalias, RME

Document No. Issued by: LNNAIS Revision # 01

Page |

COMPETENCY-BASED LEARNING MATERIALS

List of Competencies

No.

Unit of Competency

Module Title

Code

Prepare Electrical Power and Hydraulic Tools

Preparing and Maintaining Electrical Hydraulic and Power Tools

CON724308

2.

Perform Roughing-in Activities for Communication and Distribution

Performing Roughingin Activities for Communication and Distribution

CON7243009

3.

Install Wiring Devices for Floor and Ground Fault Current Interrupting Outlets

Installing Wiring Devices for Floor and Ground Fault Current Interrupting Outlets

4.

Install Electrical Protection System for Lighting and Grounding

Installing Electrical Protection System for Lighting and Grounding

Install Electrical Lighting Systems on

Installing Electrical Lighting Systems on

1.

5.





Page |

Auxiliary Outlets and Lighting Fixtures

Auxiliary Outlets and Lighting Fixtures

MODULE CONTENT Qualification Title 11

: ELECTRICAL INSTALLATION AND MAINTENANCE NC

Unit of Competency : PERFORM COMMUNICATION AND DISTRIBUTION

ROUGHING-IN

Module Title : PERFORMING COMMUNICATION AND DISTRIBUTION

ROUGHING-IN

ACTIVITIES ACTIVITIES

FOR FOR

Introduction: This module covers the knowledge, skills and proper attitude in laying-out, electrical metallic conduits for communication and distribution. It deals with laying-out of metallic conduits, wireways and cable trays, telephone terminal cabinets and cable bridge. Learning Outcomes: LO1. Install electrical metallic conduits LO2. Install wireways and cable trays LO3. Install telephone terminal cabinet CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




Page |

LO4. Install cable bridge Assessment Criteria: 1. Electrical metallic conduits are installed according to the latest edition of Philippine Electrical Code and National Electrical Code. 2. Electrical metallic conduits are installed according to the job requirements 3. Tools/equipment and materials needed for the installation are prepared in line with job requirements. Safety procedures in installing electrical metallic conduits are strictly observed according OHS guidelines and procedures.

LEARNING OUTCOME # 1

Install Electrical Metallic Conduits

CONTENTS:  PEC provisions on electrical metallic conduits  Bending electrical metallic conduit  Procedures in installing electrical metallic conduit  Safety procedures in installing electrical metallic conduits ASSESSMENT CRITERIA: 1. Electrical metallic conduits are installed according to the latest edition of Philippine Electrical Code and National Electrical Code. 2. Electrical metallic conduits are installed according to the job requirements 3. Tools/equipment and materials needed for the installation are prepared in line with job requirements. 4. Safety procedures in installing electrical metallic conduits are strictly observed according OHS guidelines and procedures. CONDITION: Students/trainees must be provided with the following: 

Tools and Equipment CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution



Materials




Page |

Lineman’s pliers Long nose pliers Diagonal cutting pliers Set of screw driver Claw hammer Hacksaw Measuring tools Pipe vise Pipe cutter reamer Simulated workplace/wiring booth o Ladder o Hickey Bending o o o o o o o o o o o

o o o o 

Electrical metallic conduits lock nuts, bushing, adapters fastening devices Conduit s

Learning Materials o Learning elements o Manuals o Books and o Philippine Electrical Code/National Electrical Code, Latest Edition

ASSESSMENT METHOD:  Demonstration  Direct observation and questioning





Page |

Learning Experiences Learning Outcome # 1 Learning Activities

Special Instructions

Read Information Sheet 2.1-1   

You can ask the assistance of your

Theories/Principles Tools, Equipment and Materials Tasks (Steps) & Key points

trainer to show you and explain further the topic you can’t understand.

Self-Check 2.1-1

Answer the following questions

Answer Key 2.1-1

Compare your answers to answer key

Task Sheet 2.1-1

Perform the following task to develop skills in bending metallic conduit

Performance Sheet 2.1-1

Perform how to operate Hickey bender.

Job Sheet 2.1-1

Prepare in installing electrical metallic conduits After doing all activities of this LO, you are ready to proceed to the next LO on Install wiring devices for floor and ground fault current interrupting outlets.





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Information Sheet 2.1-1 INSTALL ELECTRICAL METALLIC CONDUIT Learning Objectives: After reading this Information Sheet, you must be able to: 1. Classify rigid conduit. 2. Enumerate and apply the PEC requirements concerning rigid conduit preparation (bending) for installation. 3. Preparing and cutting pipes. 4. Bend rigid conduit to the following forms. 4.1 4.2 4.3 4.4

I.

rigid angle off-set cross-over or saddle gooseneck

THEORIES/PRINCIPLES Rigid conduits are classified as: 1. Rigid metal conduit 2. Electrical metal tubing (EMT) or thin wall metal conduit 3. Non-metallic conduit/PVC pipe (Polyvinyl chloride) Rigid Metal Conduit 

They are commonly used in; -

Wiring building to minimize if not totally prevent fires due to electricity. Wiring that must be buried in concrete, masonry or similar materials. Exposed or open wiring where maximum protection from mechanical damage is necessary.





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

They are normally galvanized or zinc coated to prevent corrosion, when exposed to weather, imbedded in concrete, installed in wet locations.



The standard length is 3.048 meters (10 ft.) including a coupling. Its usual diameter is 12.7 – 152.4 mm (“1/2 to 6”).

The radius of the curve of the inner edge or the field bend shall not be less than what is specified in table I. A run of conduit between an outlet and a fitting shall not contain more than the equivalent of 4 quarter bends (360°, total including those bends located immediately at the outlet or fitting).

Size of conduit

½ ¾ 1 1-1/4 1-1/2 2 2-1/2 3 3-1/2 4 4-1/2 5 6

Radius of bends with conductors without lead sheathed (Inches) 4 5 6 8 10 12 15 18 21 24 27 30 36

Radius of bends with lead sheathed conductors (Inches) 6 8 11 14 16 21 25 31 36 40 45 50 61

Table I. Radius of conduit bends (inches) Field bend is any field bend made by the electrician during the installation of the conduit. CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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Types of corrosion-resistant Rigid conduit 1. Aluminum 2. Silicon bronze alloy 3. Plastic coated The rigid metal conduit wiring, the electrician cuts, bends, threads and reamed conduits before installing them. Cutting rigid conduit is done with a hacksaw or a pipe cutter. Sharp edges or burrs at the ends could seriously damage the insulation of the wire as it is pulled into the conduit. These burrs have to be removed by a reamer or by a file as per PEC requirements. Bending conduit is done to produce a desired bend angle on conduit for installation. This is done with a hickey or conduit bender. Bends on rigid conduit pipes should be made so that the pipes are not injured nor the effective internal diameter reduced.

The illustration in figure 1. show a run of conduit which contains more than two quarter bends which is against the PEC requirements.

Figure I. Violation of PEC Requirements on Run of conduit with 4 quarter bends





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Figure 1.

conduits.

The fewer the bends, the easier it is to fish-in or pull wires into metal

One of the practical ways of determining the radius of a field bend is to multiply by 5. Diameter which is less than 1” should consider as 1” in determining the radius of bend. See the illustration below. Example: Size of conduit Radius

= ½ diameter = Diameter x 5 = 1x5 =

5”

The illustrations in figure 2. Show how to figure 90 ˚or right angle in electrical metal tubing.





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Figure 2. Figuring a right angle

Bend on Electrical Metallic Tubing Suppose the right angle bend is to be made and that the conduit is to have a rise of 18” above the floor. Assuming that the conduit is ½ in diameter, subtract 5” from the rise of 18” that leaves 13”. Hook the bender over the rigid metal conduit so that the arrow on the bender points to a point 13 inches from the end of the metal conduit as shown in figure 2. If the size of the conduit is ¾, subtract 6”. If the size is 1”, subtract 8” from the desired measurements.

The different bends that are common in a conduit installation are that the following: 1. 2. 3. 4.

Right- angle bend Off-set bend Cross-over or saddle bend Gooseneck bend

Figure 3. shown the application on the above-mentioned bend





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Figure 3. Application of the different Bends in Conduit Installation In bending a metal conduit, a pipe bender or hickey is commonly used by electricians. There are several methods however, that are used in bending in the absence of hickey, like the one illustrated below.





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Figure 4. Methods of Bending

Metal Conduits I.

Tools, Equipment and Materials CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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1. Tools: 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9

Pipe vise Hacksaw Pipe reamer & brace Pipe wrench ½ stock & die Pipe bender or hickey, ½” and ¾” Pencil or chalk Pull push or steel tape Oiler

2. Materials: 2.1 1 length rigid metal conduit, ½ dia. 10 ft. long 2.2 Lubricating oil

Important 1. Use the rigid-sized pipe bender or hickey for each size conduit. 2. Regularly clean the pull-push tape. 3. For adjustable stock and die, thread little by little in about 3 adjustments.

II.

Tasks (steps) & Key points

Cutting conduits using hacksaw When cutting any conduit with a hacksaw, use a blade with 18 to 32 teeth per inch. A blade with fewer teeth hangs up, binds, or even breaks (Figure 5. below). Put the blade in the hacksaw frame (with the teeth pointing forward) so that the teeth cut when you push the saw forward. Place the pipe in the vise so that there is ample room between the vise and the cut. CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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Figure 5.

1. Preparing and cutting pipes for installation:

1.1

A hacksaw is the most important cutting tool for sawing metal to size.





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1.2

There are many different types of hacksaws, but in general they consist of a fixed or adjustable frame with a renewable hacksaw blade.

1.3

The hacksaws illustrated show one with a straight handle and one with a pistol grip handle.

1.4

Hacksaw blades are classified by length and the number of teeth per 25 mm cutting edge.

1.5

For cutting conduit pipe, blades with a pitch of 24 teeth or 32 teeth per 25 mm of the cutting edge are recommended.

1.6

Pipes to be cut must be held steady and prevented from rotating by holding them in a suitable vise. This is a self-locking, hinged pipe vise and is available in a number of sizes. CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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1.7

The portable folding pipe vise is very practical as a mobile workplace and is used especially on building sites.

1.8 Chain pipe vises are made to hold pipes with an outside diameter of up to 8" or 200 mm. They are mounted on solid benches.

1.9 Open the vise and insert the pipe so it is horizontal and parallel to the jaw serrations.

1.10 Keep the part which is to be cut as order to stop vibrations.




close to the jaws as possible in


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1.11 Before you cut any conduit pipes, make sure you have measured and marked the correct length exactly.

1.12 Check that the blade is lightly tightened in the frame and that the teeth point forward.

1.13 Take up the hacksaw and position yourself as shown here, with yourself shoulder pointing in the direction you intend to cut. Note the position of the feet, which allows free and controlled movement of the body when cutting.





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1.14 Before finishing the cutting operation, the pipe must be ed with the left hand.

1.15 This will prevent the blade of the hacksaw being damaged.

2. Bending 90-degrees angle on metal rigid conduit

II.1

-

Lay the conduit on the ground and slip the hickey on the conduit where the first bend is to be made. See figure 5.

If it is necessary, thread the ends of the conduit before bending.





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Figure 5. Making the first bend

II.2

Step on rigid conduit and bend it at 20 to 30 degrees at a time. Refer to figure 6.

Figure 6. Bending a conduit with a hickey -

The bend must be gradual and equal to a radius 6 times the diameter of the conduit.

-

The hickey should be move downward after applying pressure to it. The rigid conduit may be held on a pipe vise instead of stepping on it.





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3. Bending a 90˚ angle on ½ thin- wall metal conduit or electrical metal tubing (EMT). Layout the right angle bend 1/2” Electrical Metal Tubing (EMT) or thin wall conduit. See figure 7.

Figure 7. Laying Out a Right Angle Bend on an EMT

-

From the rise, subtract 5” for ½” conduit, 6” for ¾” and 8” for 1” conduit. Supposed the desired rise of a bend is 16” you will have 11” left 3.1

Hook the bender over the conduit. Let the arrow on the bender point to the 11” marks from the end of the conduit. See figure 8 below





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Figure 8. Hooking the Bender over the Conduit

Illustration on figure 9 shows the movements and position of the hickey in making the 90 – degree bend on a conduit.

First Bend

Second Bend

Third Bend

Fourth Bend

Figure 9. Movements and Positions of Hickey in Making a 90 – Bend CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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3.2 Apply pressure on the handle of the Bender, while one foot is stopping on the conduit and the other on the bender. See figure 10

Figure 10. Holding and applying pressure on the conduit with foot 

BESURE THAT THE RADIUS OF THE BEND IS AT LEAST 5 TIMES THE DIAMETER OF THE CONDUIT

4. Bending a Rigid Conduit for an Off-set 4.1

Determine the distance of the first bend (from one end of the conduit) and the throw of the off – set. See figure 11





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Figure 11. Off-Set Bend 4.2

Insert the hickey just a few centimeters from the end of the conduit and make the first bend. See figure 12.

Figure 12. Making the First Bend on the Conduit

4.3

With the hickey in upside down position, slip the conduit in the jaw of the hickey and make the second bend to complete the off-set. See figure 13.





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 BE SURE TO BEND GRADUALLY TO AVOID CRIMPING THE CONDUIT

Figure 13. Completing the Off-set Bend 5. Bending a Rigid Conduit for a saddle bend 5.1

Mark a straight line on the floor and on the center draw a perpendicular line 6 inches high as shown in figure 14 on the next page.

Floor 5.2

-

Figure 14. Drawing a Perpendicular Line from the Straight Line on the

Bend the conduit and mark the point to be bent. Refer to figure 15 below.

The distance between “A” and “B” should depend on the diameter of the structure where it will cross over. Check the bend using the sketch on the floor.





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Figure 15. Making the point to be bent on a Conduit for a Saddle Bend 5.3

Slip the hickey over the conduit 4 inches from mark “Y” to the center of the saddle bends.

5.4

Rest the handle of the hickey on the floor then place your foot against it.

-

You may ask somebody to hold the other end of the conduit in the proper position while bending. See figure 16.





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Figure 16. Slipping the Hickey over the Conduit for a Saddle Bend 5.5

Insert 1 inch pipe at one end of the conduit being bend as shown in Figure 16. Pull down the pipe sleeve.

-

Pipe vise may be used to hold the conduit while bending with the hickey.

-

Slip the hickey towards you little by little while bending conduit gradually.

5.6

Thread both ends of the saddle bead if necessary as shown below.

Figure 17. Saddle Bends with Threaded Ends

6. Bending a Gooseneck-Shape on Rigid Conduit CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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6.1

Draw a guide on the flat surface for bending a gooseneck-shape on conduit.

6.2

Mark the part on the conduit where bending for the arc will begin and end. See figure 17.

-

If necessary, thread the conduit before bending.

Figure 17. Marking a Conduit for a Gooseneck Bend 6.3

Slip the hickey on the mark point and form the arc as shown in the illustration in figure 18.

Step on the conduit to control its motion.

Figure 18. Forming an Arc on a Conduit for a Gooseneck Bend.





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6.4

-

Slip the hickey over the point where the second bend would be made to finish the gooseneck bend as shown in figure 19.

For the second bend, use a pipe vise to hold the conduit when bending.

Figure 19. The Gooseneck-Shape Bend





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Self-Check 2.1.1 INSTRUCTIONS Read the direction carefully: DO NOT WRITE ANYTHING ON THE TEST BOOKLET. Write your answers on the ½ sheet of paper.

1. What is meant by PEC? 2. What is meant by NEC? 3. What is meant by EMT? 4. What is meant by PVC? CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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5. What is meant by IMC? 6. What is the radius bend of a ½ size conduit pipe? 7. What is the allowable number of bend on a conduit run? 8. What are the different of corrosion-resistant rigid conduit? 9. What are the different bends that are common in a conduit installation? 10. What tool is used for bending conduit pipe?

Answer Key 2.1.1

1. Philippine Electrical Code 2. National Electrical Code 3. Electrical metallic Tubing CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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4. Poly Vinyl Chloride 5. Intermediate Metallic Conduit 6. 5 inches 7. Not more than two bends 8. 1.

Aluminum

2. 3.

Silicon Bronze alloy Plastic coated

9. 1. Right angle bend 2. Off-set bend 3. Cross-over bend 4. Gooseneck bend 10. Hickey





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Task Sheet 2.1-1 Title: Develop skills in bending metallic conduit Performance Objective: Given in bending metal conduit, you should be able to use hickey bender in the following standard size of conduit in order to bend properly. Supplies/Materials

: Hacksaw, Hickey Bender

Equipment

: Hickey bender

Steps/Procedure: 1. Use the rigid-sized pipe bender or hickey for each size of conduit. 2. Make a level in the floor. 3. The bend must be gradual and equal to a radius 6 times the diameter of the conduit. 4. Apply pressure on the handle of the hickey bender depends of the specific direction. 5. Good housekeeping and safety practices are applied in line with job requirements.

Assessment Method: Actual demonstration, Observation





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Performance Criteria Checklist 2.1-1

Did you….

CRITERIA

YES

NO

1. Properly use the rigid-sized pipe hickey bender for each size of conduit?

2. Accurately make a measurement or level in the floor before begin to do a task?

3. Carefully bend gradually and equal to a 6 times the diameter of electrical metallic conduit?

4. Exactly bend a rigid metallic conduit free from any defects according to established standards depends of the specific direction?

5. Use a tools and materials properly?

6. Properly apply safety in installing metallic conduit strictly according OSH standards?





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Operation Sheet 2.1-1 Title: 0perating hickey bender Performance Objective: Given operating hickey bender, you should be able to know how used the bender in different types in conduit. Supplies/Materials : Hickey Bender and hickey handle Equipment

: Hickey Bender

Steps/Procedure: 1. Select proper tools in bending a conduit. 2. Do not direct adopt too much pressure in hickey bending. 3. Secure properly tools in selecting to bend different sizes of conduit. 4. Apply good housekeeping or standardized.

Assessment Method: Demonstration, Observation





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Did you….

CRITERIA

YES

NO

1. Properly select accurate tools in bending a conduit?

2. Gently adopt pressure in bending a conduit using hickey bender?

3. Properly use the correct size hickey bender for the conduit size being bent?

4. Properly apply good housekeeping and safety practices?





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Job Sheet 2.1-1 Title: Prepare an installing electrical metallic conduits Performance Objective: Given in preparing installing electrical metallic conduits, you should be able to practice in different steps/procedure in order to master that task. Supplies/Materials

: Hacksaw and Hickey bender

Equipment

: Hickey bender

Steps/Procedure: 1. Classify rigid conduit. 2. Apply the PEC requirements concerning rigid conduit in preparation (bending) for installation. 3. Use hacksaw for cutting tool in metal conduit. 4. Measure properly a conduit before subject in cutting. 5. Remove cutting burrs from the cut conduit ends. 6. Mark the distance at which the conduit must change direction. 7. Gently pressure in bending. CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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8. Bend gradually to avoid crimping the conduit? 9. Apply good housekeeping and Personal Protective Equipment (PPE)

Assessment Method: Demonstration, Observation and Questioning


Did you….

CRITERIA

YES

NO

1. Properly classify rigid conduit?

2. Properly apply PEC requirements?

3. Directly use hacksaw for cutting tool in metal conduit? CBLM on Electrical Installation and Maintenance NC II Performing Roughing-In Activities For Communication And Distribution




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4. Properly know in measurement technique?

5. Properly remove cutting burrs from the cut conduit ends?

6. Gently adopt pressure in bending a conduit using hickey bender?

7. Properly bend gradually to avoid crimping the conduit?

8. Apply good housekeeping and safety practices?





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