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115

QUARTER III Time Allotment: 40 Hours

LESSON: INSTALLING ELECTRICAL LIGHTING SYSTEMS, AUXILIARY

OUTLETS, AND LIGHTING FIXTURES

I. INTRODUCTION:

This lesson covers the knowledge and skills in troubleshooting of defective

fluorescent lamp assembly, preparing an electrical wiring plan and estimate needed

materials for the job. It contains the information on troubleshooting defective

fluorescent lamp fixture, electrical wiring plan, estimating electrical materials needed

for the job.

II. LO1- PLAN AND PREPARE WORK FOR A SPECIFIC JOB ORDER

Troubleshoot defective fluorescent lamp assembly

Prepare an elecrical wiring plan of a bungalow residential building based on the

Philippine Electrical Code requirements

Estimate the materials needed for the job.

III. PRE/DIAGNOSTIC ASSESSMENT:

Directions: Choose the letter of the correct answer. Write only the letter of your answer on a separate sheet of paper. ____1. It is the wiring that connects directly to the main panel and supplies power to

lighting outlets and power outlets.

a. conduit layout b. circuit homerun c. main feeder d. lighting circuit ____2. In the electrical wiring plan the switches are always located near the___.

a. windows b. door c. floor d. ceiling ____3. It is a part of electrical wiring plan that contains name and address of the owner, signature and dry seal of a master electrician or electrical engineer. a. Location map b. Specification c. Riser diagram d. Title block ____4. It is a part of electrical wiring plan that consist of type of service, single phase 2- wire or 3-wire and voltage. a. Location map b. Specification c. Riser diagram d. Title block ____5. It is a part of the electrical wiring plan which shows specification of branch

circuits such as size of wire, circuit protection rating, size of conduit, and...

a. Location Map b. Load Schedule c. Legend d. Title Block

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____6. It shows the meaning of electrical symbols used in the electrical plan.

a. Floor Plan b. Specification c. Legend d. Title Block

____7. It shows the classification of service, type of wiring method to be used and supplies and materials to be used by the contractor. a. Floor Plan b. Specification c. Legend d. Title Block ____8. It is a technical representation of an electrical system proposed to be installed in building or house. a. Electrical Wiring Plan b. Specification c. Lighting Layout d. Power Layout ___9. It refers to the number of switches on a single mounting plate.

a. Pole b. Throw c. Path d. Gang

___10. It is the type of switch used for controlling light in two or more locations.

a. 3-way b. 4-way c. 1-way d. 2-way

INFORMATION SHEET 1.1

TROUBLESHOOTING DEFECTIVE FLUORESCENT LAMP FIXTURES

Fluorescent lamps have more components compared to incandescent lamps and when installed in pairs or groupings, things may go wrong and things get more complicated. In this scenario, troubleshooting is necessary. Troubleshooting is problem detecting and solving, often applied to repair defective gadgets or products like fluorescent lamp fixtures. It is a systematic search for the source of a problem so that it can be solved, to make the gadgets or products operational again.

The table below describes the common problem indications, possible causes and

corrective action that should be taken.

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Troubleshooting Guide Table for Defective Fluorescent Lamp Fixtures

Problem Possible Cause Corrective Action

A. Lamp fails to light. No flickering.

o Leak in the

lamp tube

Inspect visually the lamp tube

for possible cracked or

damaged. If there is, replace

with a new one.

o No electrical power to the lamp fixture.

Check the power source. Make sure that all power controls such as circuit breaker and switch are turned on.

o Loose contact

between the

lamp and the

lamp holder.

Adjust the lamp and set it

properly. Clean dirty sockets

thoroughly. Check the spacing of

the lamp holders. If they are too

far apart, make needed

adjustments. If damaged, replace

the lamp holders.

o Improper

wiring

Check the wiring connections to

see whether it follows the

diagram on the ballast label

o Defective

ballast

Check the ballast. This may be

determined by checking

continuity between the leads of

the ballast. If the pointer of the

multi-tester deflects a little the

ballast is good; if it deflects

fully, the windings of the ballast

is shorted and if it will not

deflect, the winding is

open.Replace the ballast.

B. Slow or

intermittent

starting

o Loose contact

between the

lamp and the

holder







the lamp holders.

o Inactive

starter

Test starter in adjacent fixture. If

this does not work, replace the

starter.

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o Improper

wiring




C. Short life span

of the lamp

o Constant

switching on

and off of the

circuit

Avoid unnecessary turning on

and off the cicuit, to maximize

the life span of the lamp.

o Loose contact

between the

lamp and the

holder







the lamp holders.

o Improper

wiring



diagram on the ballast label.

o Defective

starter

Remove the starter while the

lamp is on. If the flashing stops,

the starter is defective. Replace

it.

D. Blinking or

flickering

o Impurities

inside the

lamp

At times, the arc in the lamp

may swirl during normal

operation. Trying to turn the

lamp on and off usually solves

this, if this does not work,

replace the lamp.

o Loose contact

between the

lamp and the

holder







the lamp holders.

o Improper

wiring




o Defective

starter

Remove the starter while the

lamp is on. If the flashing stops,

the starter is defective. Replace

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it.

o Defective

ballast

If the ballast frequency rating is

not the same as the line

frequency, flickiring may occur.

Replae with a ballast with proper

rating.

SELF CHECK 1.1 TROUBLESHOOTING DEFECTIVE FLUORESCENT LAMP FIXTURES

Directions: Fill in the blank to match or to complete the Troubleshooting Guide Table. Use a separate sheet of paper.

Problem Possible Cause Corrective Action

Lamp fails to light. No flickering.

Leak in the lamp tube

1.

2. Check the power source. Make sure that all power controls such as circuit breaker and switch are turned on.

Improper wiring

3.

4. Check the ballast. This may determined by checking continuity. Between the leads of the ballast, if the pointer of the multi-tester deflects a little the ballast is good, if it deflects fully, the windings of the ballast is shorted and if it will not deflect the winding is open.Replace the ballast.

Slow or intermittent starting

5. Adjust the lamp and set it properly. Clean dirty sockets thoroughly. Check the spacing of the lamp holders. If they are too far apart, make needed adjustments. If damaged, replace the lamp holders.

Inactive starter

6.

7. Check the wiring connections to see whether it follows the diagram on the ballast label.

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Short life span of the lamp

Constant switching on and off of the circuit.

8.

9. Remove the starter while the lamp is on. If the flashing stops, the starter is defective. Replace it.

Blinking or

flickering

10. At times, the arc in the lamp may swirl

during normal operation. Trying to turn the

lamp on and off usually solves this, if this

does not work, replace the lamp.

ACTIVITY SHEET 1.1 TROUBLESHOOTING DEFECTIVE FLUORESCENT LAMP FIXTURES

Directions: Your teacher will provide a defective fluorescent lamp fixture and your task is to employ the corrective action. Refer to troubleshooting guide table for defective fluorescent lamp fixtures.

Instrument, Tools, and Materials Needed:

Instrument: Quantity

Multi-tester 1 pc

Materials:

Defective Fluorescent Lamp 1set

Fluorescent tube, ballast, starter, holder and housing

1 pc each

Electrical tape 1 roll

Flat cord #20 awg 1 meter

Tools:

Philip Screw driver 1 pc

Flat Screw driver 1 pc

Side cutting pliers 1 pc

Long nose pliers 1 pc

Personal Protective Equipment:

Gloves 1 pair

Goggles 1 pc

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Procedure:

1. Prepare the necessary tools, equipment, and materials. 2. Wear appropriate PPE.

3. Perform appropriate troubleshooting process based on the Troubleshooting Table

for Defective Fluorescent Lamp Fixtures.

4. Check the output for functionality.

5. Observe good housekeeping.

Assessment Criteria

Dimensions Points

1. Accuracy of troubleshooting process 10

2. Functionality of the repaired fluorescent lamp 10

3. Use of tool 5

4. Speed 5

5. Housekeeping 5

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INFORMATION 1.2 ELECTRICAL WIRING PLAN

Electrical Wiring Plan is a technical representation of electrical system proposed to

be installed in building or house. It includes material, devices and equipment.

Sample Electrical Wiring Plan

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Parts of an Electrical Wiring Plan

Floor Plan is a plan of a room or floor of a building drawn to scale as if viewed from above.

Sample Floor Plan The Legend shows the meaning of each symbol used in the electrical plan. The following are sample symbols commonly used in the plan.

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The Load Schedule

The following details can be seen in the schedule of load:

Number of branch circuit of electrical wiring system

Number of light outlet, power outlet and switches per branch

Total wattage rating of the load per circuit branch

Total current load per circuit and size of wire used

Computation of the total power and current of each circuit branch.

Size of conduit used for feeder line and branch circuits.

The Riser Diagram is a single line diagram presentation of the entire electrical circuit

from the service entrance up to the smallest circuit branch. It shows:

Character and type of service, single phase 2 wire/ 3 wire

Size of service entrance conductor and the conduit used

Type and size of wire for each branch

Size of protective device for main circuit breaker and each branch

Sample Riser Diagram: Single Line Diagram

230V

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Title Block

The title block or the name plate indicates the following details:

1. Name and location of the proposed installation. 2. Name and address of the owner. 3. Name and signature and dry seal of master electrician or electrical engineer. 4. Printed name of the owner 5. Initial of the draftsman and the data when drawing was done.

RESIDENCE LOCATION

B-16 L-34 P-6 Pleasant Hill Subd. City of San Jose del Monte, Bulacan

DRAWN BY Arch. Shadrach Joseph Siguan

CHECKED BY Engr. Steve John C. Sabocojan

Sample Title block

Specification

Specification includes the following: 1. Classification of service 2. Type of wiring method to be used 3. Number of branch circuit and their corresponding sizes 4. Supplies materials to be used by the contractor

Sample Specification 1. All electrical works herein shall be executed in accordance with the provision of the latest edition of Philippine Electrical Code (PEC). The rules and regulations of locality and requirements of the power company. 2. All electrical works herein included shall be executed by experienced men under supervision of full time licensed electrical engineer. Works shall be neatly placed, securely and properly finished. 3. All conduit shall be protected against damages by the entrance of water and foreign matter during construction. All ends on conduits shall be plugged to exclude moisture and dust

immediately after conduits are placed. 4. Single conductor insulated THHN thermoplastic shall be used. The min. size of wires shall be 3.5mm2 THHN for all lighting and power outlet. 5. Contractor must submit shop drawing of all panel board to the engineer prior for fabrication. Only one brand of circuit breaker and only the approved panel board fabricator shall be utilized in the entire project requirement. Use copper for circuit breaker and backyard fabricator of panel board is not acceptable. 6. Mounting height of devices shall be approved by _______ and or as follows

Panel board 1800mm above finished floor level to top of panel Wall switches 1300mm above finished floor level to center of devices Power outlet 300mm above finished floor level to center of box

7. Upon completion of electrical works, the following tests shall be performed by the contractor inclusive of the installation to be reported in details and in forms approved by _____.

a. Insulation resistance phase d. phase sequence test b. Phase balancing test e. functional test c. Voltage test

8. All dimensions are in millimeters unless noted otherwise. For exact dimensions refer to the architectural plans.

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Location map shows the following details:

1. Bordering areas showing the well known streets 2. Location of the utility company pole which supplies electric energy

Sample Location Map

CIRCUITING GUIDELINES based on the Philippine Electrical Code (PEC)

requirements: 1. The code requires sufficient circuitry to supply residential load of 30 watts per

square meter.

2. The requirement 30 watts per square meter is up to 80 square meters for 20 amp circuit (2400 watts) or 60 square meters for 15 ampere circuit (1800watts).

3. The code requires a minimum of 20 amperes for appliance branch to feed all small appliances outlet in the kitchen, dining, and living room.

4. The general purpose branch shall be rated 20 amperes. Wire no. 12 AWG is the minimum size of conductor required for all the convenience outlets.

5. The minimum circuit load of 15 ampere circuit breaker shall be used for light circuit.

6. Plug outlet or convenience receptacles shall be counted in computing the load if its not in the load of general lighting circuit.

For 15 amp circuit: 9/1.5= 6 outlets

For 20 amp circuit 12/1.5= 8 outlets

7. Convenience outlet should be planned properly. It should not be placed in one circuit so that the failure of one will not deprive the supply of power to the other circuit.

8. All kitchen outlets should be fed from any of the circuits except lighting circuit.

9. Certain outlet in the room should be designed as appliances outlet.

All kitchen receptacles

Dining room receptacles

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One in the living room

10. The code requires that at least one 20 amp circuit is supplied to the laundry outlets.

11. Provide a separate circuit for air conditioning units.( Consider it as a special purpose circuit / outlet )

SELF-CHECK 1.2 PARTS OF ELECTRICAL WIRING PLAN

Directions: Identify what is being referred to by the following statement. Write your

answer on a separate sheet of paper.

1. It is a technical representation of an electrical

system proposed to be installed in building or house.

2. It is a part of the electrical plan which shows the size of service entrance conduit.

3. It is a part of the wiring plan which shows the number of branch of electrical circuit.

4. It shows the meaning of electrical symbols used in the electrical plan.

5. It shows the name and location of the proposed wiring installation.

6. It is a plan of a room or floor of a building drawn to scale as if viewed from above.

7. It is a part of the plan classification of service and type of wiring method to be used.

8. The PEC requires that at least one ____amp is supplied to the laundry outlets.

9. The PEC requires sufficient circuitry to supply residential load of ____watts per square meter.

10. The minimum circuit load of ____amperes circuit breaker shall be used for light circuit.

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INFORMATION 1.3 SKETCHING AN ELECTRICAL WIRING PLAN

Sketching an Electrical Wiring Plan Before starting to sketch an electrical wiring plan, the minimum requirements for each area or room in the building should be considered. BEDROOM: A bedroom is a private room where people normally sleep for the night or

relax during the day. A general illumination should be provided in this area.

Convenience outlets should also be installed on each side and within 1.5 to 2 meters of

the centerline of each bed location.

Lighting and power provision for the bedroom MASTERS BEDROOM: The masters bedroom is the principal bedroom in a house and is usually occupied by the head of the household. The lighting and power/convenience outlets requirement is similar to the ordinary bedroom.

Lighting and power provision for the masters bedroom

129

DINING AREA: A dining area is a part of the house for consuming food. In modern

times it is usually adjacent to the kitchen for convenience in serving. This area should

be well lighted and provided with convenience outlets.

Lighting and power provision for a typical dining area

LIVING AREA: A living area is a part in a residential house for relaxing and socializing. This

should be provided with convenience outlets. Usually chandelier and pin lights are installed in

this area as shown in the drawing.

Lighting and power provision for the living area

130

KITCHEN: A kitchen is a part of a house used for cooking and food preparation. This area should be well lighted and should be provided with convenience outlets. A special purpose outlets should be installed for cooking range and other kitchen appliances.

Lighting and power provision for the kitchen Toilet and Bathroom: A toilet is a sanitation fixture used primarily for the disposal of

human excrement and urine. A bathroom is a room for personal hygiene, generally

containing a bathtub or a shower. Lighting should be installed in this room.

Convenience outlet could also be installed but it should be near the mirror or away

from the shower area.

Lighting and power provision for the Toilet & Bathroom

PORCH: Some porches are simply attachments of a home to give the traditional

appearance to a home. Similar to a living area, this should also be provided with

convenience outlets. Usually chandelier and pin lights are installed in this area as

shown in the drawing.

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Typical Porch Lighting and power provision

GARAGE: The traditional opening of garage door is through manual operation. But

because of the high technology, garage door remote has been introduced. Lighting and

convenience outlets should be provided in this area.

Typical Garage Lighting and power provision

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GARDEN: A garden is a planned space, usually outdoors, set aside for the display,

cultivation of plants and other forms of nature. Lighting and convenience outlets

should be provided in the area.

Garden Lighting and power provision

The final design of the typical bungalow residential wiring plan is shown below,

indicating service entrance, electric meter, position of the switches, convenience

outlets, lighting outlets and panel board.

Typical Bungalow Residential Electrical Wiring Plan

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READING ELECTRICAL PLAN To read electrical plans, start with the floor plans where you can get an idea of the layout and intent of the space. Carefully study and understand the wiring diagrams, which show the paths that wires will take from each piece of equipment back to the panel. Electrical components are represented by various symbols and their corresponding meaning.

Figure A: LIGHTING OUTLETS LAYOUT

Figure B. CONVENIENCE OUTLETS/POWER LAYOUT

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Number of lighting outlets, switches, and convenience outlets (C.O.) found in figures A and B

Part of the

House

No. of

Lighting Outlet

No. of

Switch-Type

No. of C.O.-Type

Living Area 1 2 - s2 2

Bedroom 1 2 1 - s3 1 & 1 - acu

Bedroom 2 2 1 - s3 1 & 1 - acu

Kitchen 1 1- s1 1- s3

2 & 1 - Range Outlet

Dining Area 2 1 - s2 1

Porch 1 1

Car Port 2 1

Toilet & Bath 1 1- s 1

Family hall 1 1 - s 2

Open Area 5 1

Passage 1

To determine total watts and current loads in figures A and B

Figure A: Lighting Outlets Layout Examine the lighting layout in figure A. There are 19 lighting outlets. Split the 19 lighting outlets into two circuits 1 and 2.

There are 19 light outlet divided into two

Circuit 1 = 9 light outlets Circuit 2 = 10 light outlets

A. Circuit 1 Lighting Load (9 light outlets)

1. The Philippine Electrical Code provides that 100 watts be the maximum load light outlet. Thus, for 9 light outlets at 100 watts, multiply:

9 outlets x 100 watts = 900 watts

2. Compute the current load

900watts/230volts = 3.91amperes

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B. Circuit 2 Lighting Load (10 lights outlets)

1. For 10 light outlets, find the total load in watts:

10 light outlets x 100 watts = 1,000 watts

2. Compute current load:

1000 watts/230 volts = 4.35 amperes

Figure B: Convenience Outlets/Power Layout

Count the convenience outlets in figure B. There are 16 convenience outlets. Circuit 3 = 6 convenience outlets Circuit 4 = 6 convenience outlets Circuit 5 = 1- range load Circuit 6 = 1- water heater load Circuit 7 = 1- Aircon Unit Circuit 8 = 1- Aircon Unit

C. Circuit 3 for small Appliance Load: The Philippine Electrical Code specifies 180 watts load limit per convenience outlet. Thus:

1. Find the number of appliance outlet and total load in watts.

6 outlets X 2 gang per outlet x 180 watts 12 x 180 = 2,160 watts

2. Compute current load 2,160 watts/230 volts = 9.39 amperes

D. Circuit - 4 for small Appliance Load

1. Find the number of appliance outlet and Total Load in watts. 6 outlets X 2 gang per outlet x 180 watts 12 x 180 = 2,160 watts

2. Compute current load

2,160 watts/230 volts = 9.39 amperes

E. Circuit - 5 for Range Load

1. Range load (appliance rating) at 8.0 kw = 8,000 watts

2. Solve for current load 8,000watts/230 volts = 34.78 amperes

F. Circuit - 6 for water Heater load

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1. One unit of water heater at 2.5 kw = 2,500 watts

2. The total current load will be;

2,500 watts/230 volts = 10.86 amperes

G. Circuit - 7 and 8 with 1-unit air conditioner each

1. One unit of air conditioner at 1.5 horse power is: 1.5 hp x 746 watts = 1,119 watts Article 6.7 of the Philippine Electrical Code (PEC) provides that:

Branch circuit conductor supplying a motor shall have an ampacity not less than 125% of the full load current

2. Current load: 1,119 watts/230 = 4.87 amperes

4.86 x 125% = 6.07 amperes

Total watts and current loads from circuit 1 to circuit 8:

Ckt. No.

Load

No. of Outlets

Total rating in Watts

Total rating in Ampere

1. Lighting Outlets 9 900w 3.91A

2 Lighting Outlets 10 1,000w 4.35A

3 Convenience Outlets 6 2,160w 9.39A

4 Convenience Outlets 6 2,160w 9.39A

5 Range Outlet 1 8,000w 34.78A

6 Water heater Outlet 1 2,500w 10.86A

7 Aircon Unit Outlet 1 1,119w 4.87A

8 Aircon Unit Outlet 1 1,119w 4.87A

Total Rating 18,958w 82.42 A

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ACTIVITY SHEET 1.2

SKETCHING ELECTRICAL LAYOUTS

Directions: Below are floor plans A and B. Draw the necessary electrical

symbols in their proper locations to complete the electrical house plan. Determine the total watts and current loads. Use Sketch pad/Oslo papers.

Floor Plan A. Lighting Outlets Layout

Floor Plan B. Convenience Outlets/Power Layout

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ACTIVITY SHEET 1.3

SKETCHING ELECTRICAL WIRING PLAN

Directions: Prepare an Electrical Wiring Plan of a Bungalow Residential

Building based on the Philippine Electrical Code (PEC) Requirements. Use

Sketch pad or Oslo paper.

Material:

Sketch pad/Oslo papers Tools:

Pencil

Eraser

Procedure:

Note: one Oslo paper/ bond paper for each required task

1. Draw a floor plan.

2. Layout the position of light outlet in your floor plan.

3. Lay out the position of power outlet in your floor plan.

4. Connect the power outlet to its corresponding circuit branch.

5. Prepare the load schedule.

6. Prepare legends.

7. Prepare the schematic feeder diagram (riser).

8. Prepare the specification.

9. Prepare the location map.

10. Prepare the title block. Assessment Criteria

Dimensions Points

1. Accuracy of Electrical Layouts 20

2. Completeness of the Task 20

3. Use of Drawing Instrument 5

4. Speed 5

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INFORMATION SHEET 1.4

ESTIMATING ELECTRICAL MATERIALS NEEDED FOR THE JOB

Estimate electrical materials for the installation of the two fluorescent lamps controlled by the two 3 way-switches and One SPST switch using Flexible Non-metallic Conduit in a 4 x 4 x 3/4 wiring board.

Single Line diagram of the two fluorescent lamps controlled by two 3 way-switches and One SPST switch using Flexible Non-metallic Conduit

Needed Tools, Materials and Instrument:

Instrument:

Multi-tester 1 unit

Materials:

Fluorescent Lamp (20 watts) 2 sets

Lamp socket 2 pcs

Utility box 3 pcs

Safety switch 1 set

SPST switch 1 pc

Junction box 2 pcs

Adapter with lock nuts 15 pcs

Conduit clamps/straps 25 pcs

1 gang plate cover 3 pcs

Three way switch 2 pcs

Wood screws ( x ) 50 pcs

Electrical tape 1 roll

Solid/Stranded wire TW 30 m

Plastic Flexible Conduit 5 mts

Wiring Board 4x4x3/4 I pc

S3w

w

S S3w

ww

ww

w

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Tools:

Philip Screw driver 1 pc

Flat Screw driver 1 pc

Side cutting pliers

Diagonal cutting pliers

1 pc 1 pc

Long nose pliers 1 pc

Push pull tape rule 1 pc

Claw Hammer 1 pc

Gimlet 1 pc


Gloves 1 pair

Goggles 1 pc

ACTIVITY SHEET 1.4 ESTIMATE ELECTRICAL MATERIALS NEEDED FOR THE JOB

Directions: Estimate the electrical materials that have been used in the wiring

installation in figure x. Job specification: Nonmetallic conduit with 4 bulbs assigned as bulb A, B,C and D. Bulb A is controlled in 3 locations by one 4-way switch ( S4W ) and two 3-way (S3w) switches. Bulbs B to D connected in parallel each controlled by a single pole switch. The size of wiring board is 4 x 4 x 3/4plywood.

141

Figure x Note: Write the materials on the table provided for.

Materials and Personal Protective Equipment Used in the Installation:

Materials: Quantity


Assessment Criteria

Dimensions Points

1. Quantity of material are complete based on the job 20

2. Personal Protective Equipment had been identified 5

3. Effective use of time (speed) 5

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ACTIVITY SHEET 1.5 ESTIMATING ELECTRICAL MATERIALS NEEDED FOR THE JOB

Directions: Using the given wiring plan below, estimate the materials needed for the

installation of the circuit in a 4 x 4 x 3/4 wiring board.

Working drawing

Two lamps in parallel controlled by a single pole switch with duplex convenience outlet

Procedure: 1. Analyze the given working drawing.

2. Determine the type of wiring method to be used.

3. List down all the necessary tools needed for the installation. List down the required instruments to be used in wiring the circuit.

4. List down the needed materials such as electrical boxes, wiring supports and fittings; electrical conductors; switches; and lamp sockets.

5. List down the required PPE for the installation.

CB

1 2

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Materials and Personal Protective Equipment (PPE)

Materials, Tools.

Equipment and PPE

Descriptions Quantity

Materials

Tools

Equipment

Personal Protective Equipment (PPE)

Assessment Criteria

Criteria Yes No

Electrical tools, materials, equipment are prepared in line with the job requirement.

Quantity, quality and rating of tools and materials are checked in line with the job requirements.

Personal protective equipment were identified.

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SUMMATIVE ASSESMENT:

Test I. Multiple Choice:

Directions: Choose the letter of the correct answer. Write your answer on a separate

sheet of paper.

____1. It is of electrical wiring plan that contains name and address of the owner, signature and dry of master electrician or electrical engineer. a. Location map b. Specification c. Riser diagram d. Title block ____2. It is of electrical wiring plan that consists of type of service, single phase 2- wire or 3-wire and voltage.

a. Location map b. Specification c. Riser diagram d. Title block ____3. It is a part of the electrical wiring plan which shows the number of branch of electrical circuit. a. Location map b. Specification c. Riser diagram d. Title block ____4. It is a technical representation of an electrical system proposed to be installed in building or house. a. Electrical Wiring Plan b. Specification c. Lighting Layout d. Power Layout

____5. It is the area of the house where the chandelier is usually installed.

a. kitchen b. masters bedroom c. living area d. garage ____6. In the electrical wiring plan, switches are always placed near the___.

a. windows b. door c. floor d. ceiling ____7. It shows the meaning of electrical symbols used in the electrical plan.


____8. It shows the classification of service, type of wiring method to be used and supplies and materials to be used by the contractor.


____9. it is used in estimating distances in an electrical floor plan so as to determine

length of conduit and wires. a. Scale b. Philippine Electrical Code c. Flexible tape d. Protractor

____10. If the computed load current doesnt exactly match with what is found in the

wire table of the PEC, what is the safe practice? a. Use half the ampacity b. Use double the ampacity c. Use the nearest higher ampacity d. Use the nearest lower ampacity

145

Test II. Understanding Test:

Directions: Below are unarranged procedures in assembling a 20 watts fluorescent

lamp fixture. Arrange them in proper order. Write your answer in a separate sheet of

paper.

1. Wear appropriate PPE.

2. Perform housekeeping

3. Prepare the necessary tools, materials. 4. Study the schematic diagram.

5. Mount the starter socket to the frame. Make sure it is attached securely.

6. Assemble and wire a 20-w fluorescent fixture using Normal or Medium Power

Factor ballast (M.P.F.)

7. Mount the connection terminal socket to the frame. Make sure that it is fixed not too loose or too tight.

8. Test the circuit for ground short or open wiring. If fault is found, repair it.

9. Make the necessary connections of the fluorescent fixture by referring to the

schematic wiring diagram.

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Test II. Performance Test:

Directions: Below are floor layouts A and B. Draw the necessary electrical symbols

in their proper locations to complete the electrical wiring plan. Make a separate

layout for lighting and power. Use Oslo or bond paper. (11 points)

Floor Layout A Floor Layout

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