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It discusses about simple instructions on how to install electrical lighting
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Unit of Competency : INSTALL ELECTRICAL LIGHTING SYSTEM S ON AUXILIARY OUTLET AND LIGHTING FIXTURES
M odule Title: Installing of Electrical Lighting System on Auxiliary Outlets and Lighting Fixtures
Republic of the Philippines Department of the Education PUBLIC TECHNICAL-VOCATIONAL HIGH SCHOOLS
mhar cueto
Copyright Department of Education 2008
First Published JUNE 2008
This draft was prepared during the Competency-Based Learning Materials Development Workshop conducted at the Marikina Hotel, Marikina City on February 18-22, 2008 and finalized on May 23-25, 2008 at the Development Academy of the Philippines (DAP), Tagaytay City.
This learning instrument was developed by the following personnel:
Technology Teachers:
Community Vocational High School MinSCAT Calapan City Campus, Masipit, Calapan City
Contextual Teachers:
M S. GINA C. DELOS SANTOS AFG Bernardino MTS Lias, Marilao, Bulacan
Facilitator:
Tech-Voc Task Force
Encoder
M R. LEM UEL C. VALLES
Fund: Department of Education.
REFERENCES AND FURTHER READING:
Balana, Ulysses B ., TLE III Electricity, Eferza Academic Publication, 2004, pp. Handley, William, Industrial Safety Handbook, McGraw-Hill Book Co.; 1977, pp. Hubert, Charles I. Preventive Maintenance of Electrical Equipment – 2 nd^ Ed., New York: McGraw Hill Book Co.; 1974, pp. Institute of Integrated Electrical Engineers, Inc. Phillippine Electrical Code, Part I, 2002, # 41, Monte de Piedad St., Cubao, Quezon City, Philippines: Bookman Inc., June 2002.
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Welcome to the Module “Installation of Electrical Lighting System on Auxiliary Outlets and Lighting Fixtures”. This module contains training materials and activities for you to complete.
The unit of competency “ Install Electrical Lighting System on Auxiliary Outlets and Lighting Fixtures” contains the knowledge, skills and attitudes required for a Building W iring Installation course. It is one of the specialized modules at National Certificate (NC) Level II.
You are required to go through a series of learning activities in order to complete each of the learning outcomes of the module. In each learning outcome there are Information Sheets, Job Sheets, Operation Sheets and Activity Sheets. Do these activities on your own and answer the Self- Check at the end of each learning activity.
If you have questions, do not hesitate to ask your teacher for assistance.
You may already have some or most of the knowledge and skills covered in this module. If you can demonstrate competence to your teacher in a particular skill, talk to him/her so you do not have to undergo the same training again. If you have a qualification or Certificate of Competency from previous trainings show it to him/her. If the skills you acquired are consistent with the relevant to this module, they become part of the evidence. You can present these for RPL. If you are not sure about your competence/skills, discuss this with your teacher.
After completing this module ask your teacher to assess your competence. Result of your assessment will be recorded in your competency profile. All the learning activities are designed for you to complete at your own pace.
Inside this module you will find the activities for you to complete and relevant information sheets for each learning outcome. Each learning outcome may have more than one learning activity.
This module is prepared to help you achieve the required competency, in receiving and relaying information. This will be the source of information that will enable you to acquire the knowledge, skills and attitude in Building Wiring Installation National Certificate (NC) Level II independently at your own pace or with minimum supervision or help from your teacher.
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Ballast is an induction coil which produces high voltage to start the lamp into operation.
Fluorescent tube is a circular bulb containing mercury vapor and inert gas with phosphor coating inside.
Frame is the metal housing of the whole fixture. Incandescent bulb is a light source with a metal filament that glows with white heat.
Insulation is a nonconductive device covering that protects wires and other electricity carriers.
Junction box is an enclosure used for splitting circuits into different branches. Knockouts are tabs that can be removed to make opening in a box for cable and conduit connector.
Knick is small cut on wires.
Limelight comes from the incandescent light produced by a rod of lime bathed in a flame of oxygen and hydrogen.
Non-metallic conduits are electrical materials which are manufactured to be resistant to moisture and chemical atmosphere.
Photographic lamps as the name implies, are used in photography and projection service.
Receptacle is an outlet that supplies power for lamp and other plug-in devices
Screw cap is the threaded base of the bulb that secures it to a lamp. Solid knobs are used to support or anchor wires as big as No. 8 or even bigger.
Split knobs are used to support wires smaller than No. 8. Support wires are wires that physically hold up the filament. Vinyl Chloride is a toxic carcinogen which has been proven to cause angiosarcoma, a deadly primary liver cancer.
AW G – American Wire Gauge PEC – Philippine Electrical Code PPE – Personal Protective Equipment PVC – polyvinyl chloride SPST – Single Pole Single Throw
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Course : BUILDING W IRING INSTALLATION
Unit of Competency : INSTALL ELECTRICAL LIGHTING SYSTEM ON AUXILIARY OUTLETS AND LIGHTING FIXTURES
Module Title : Installing of Electrical Lighting System on Auxiliary Outlets and Lighting Fixtures
Learning Outcome 1 : Layout and install electrical wiring using knob and tube method Assessment Criteria :
1. Electrical wiring is installed in line with the job requirements. 2. Electrical wiring is installed in line with the PEC/NEC. 3. Safety procedure in installing electrical wiring is strictly followed in line with the Occupational Safety and Health Standards.
References :
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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:
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.
Figure 1. 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.
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Figure 2. The Solid Knob with Leather washer for Protection
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 whene ver wires cross each other. It gives the wire extra protection from injury.
30 cm. 1 Ft.
Height of Knob
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Safety reminders when installing knob and tube wiring
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Installing one bulb controlled by one single pole single throw (SPST) switch in one location.
Name ________________________________________ Year/Section: _____
Date _________________________________________ Overall Rating ____
I – M aterials Required
Qty Unit Description 1 pc single pole, tumbler switch, surface type 1 pc porcelain/plastic receptacle, surface type 1 pc incandescent bulb, 220v, 25w 7 mts solid wire # 14 t.w. 11 pcs porcelain/plastic split knobs with screws 1 ft mica tubing or loom 1 roll electric tape 1 pc safety switch/cut out 2 pcs fuse, 10-a, cartridge type
II- Tools Needed
Screwdrivers electrician’s knife Pliers pull push tape rule hammer
III – Procedure
Perform this procedure:
3.Install porcelain/plastic receptacle and porcelain cut-out/safety switch to the desired location.
5.Provide mica tubing in every termination of connection of the wires.
6.Make connection from receptacle to safety switch and another connection from switch to safety switch. Tighten screw of knobs.
7.Fasten the switch. Provide porcelain base under it.
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I do hereby certify that my student has satisfactorily passed this performance test by demonstrating their ability in installing one outlet controlled from one location.
Conforme: Attested:
Student Date Teacher Date
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Installing two bulbs controlled individually by two single pole switch in two locations
Name ________________________________________ Year/Section: ____
Date _________________________________________ Overall Rating ____
I – M aterials Required
Qty Unit Description 2 pcs single pole, tumbler switch, surface type 2 pcs porcelain/plastic receptacle, surface type 2 pcs incandescent bulb, 220v, 25w 10 mts solid wire # 14 t.w. 17 pcs porcelain/plastic split knobs with screws 3 ft mica tubing or loom 1 roll electric tape 1 pc safety switch/cut out 2 pcs fuse, 10-a, cartridge type
II – Tools Needed Set of screwdrivers Set of pliers hammer gimlet electrician’s knife
III- Procedure
Perform this procedure:
6.Connect the wires to where it is intended. Refer to pictorial diagram.
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Rating Scale: VS – Very Satisfactory = 15 – 11 S – Satisfactory = 10 – 5 NI – Needs Improvement = 6 and below
I do hereby certify that my student has satisfactorily passed the performance test by demonstrating his ability in installing two outlets, controlled individually by two single pole single throw switch in two location.
Conforme: Attested:
Student Date Teacher Date
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Installing one bulb, controlled from two location by two-3-way switch
Name ________________________________________ Year/Section: _____
Date _________________________________________ Overall Rating ____
I – M aterials Required
Qty Unit Description 2 pcs three-way switch, surface type 1 pc porcelain/plastic receptacle, surface type 1 pc incandescent bulb, 220v, 25w 12 mts solid wire # 14 t.w. 20 pcs porcelain/plastic split knobs with screws 3 ft mica tubing or loom 1 roll electric tape 1 pc safety switch/cut out 2 pcs fuse, 10-a, cartridge type
II – Tools Needed
Set of screwdrivers Set of pliers hammer gimlet electrician’s knife
III- Procedure
Perform this procedure: 1.Prepare all tools and materials needed.
2.Wear appropriate PPE.
3.Install porcelain/plastic receptacle and porcelain cut out/safety switch to desired location.
4Fasten split knobs to proper location and distances. Do not tighten screws. Provide clearance for insertion of wires.
5.Provide mica tubing in every connection of the wires. Follow the figure/drawing as shown.
6.Connect the wires to where it is intended.Refer to pictorial diagram.
