: HOUSE WIRING. Attendance : 90% attendance is must to appear for the examination COURSE THEORY PRACTICAL TOTAL HOUSE WIRING

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1 HOUSE WIRING COURSE Duration Eligibility : HOUSE WIRING : 3 Months. : Minimum 7 th class pass and able to read and write at least in Telugu Age : Above 14 Years Attendance : 90% attendance is must to appear for the examination Scheme of Instruction for Course: COURSE THEORY PRACTICAL TOTAL HOUSE WIRING Load/Week For practical s tie up should be made with local authorized service work shops Evaluation : For theory - 30 Marks/ Multiple choice questions or question paper contains 10 questions any 6 questions can be answered (6x5M=30M).Question paper can be answered either in English or Telugu. For Practical s 70 Marks/100 - Should be conducted at institution level by appointing external examiner from industry

2 Electrical House Wiring Total periods: 72, Periods per week: 06 Max Marks 30 TIME SCHEDULE Week Major Topics No. of Periods allotted 1. Basics of Electrical Engineering 6 2. Batteries - Safety precautions - First Aid 6 3. Wiring instruments Accessories 6 4. Soldering, Fuse materials & MCB 6 5 Wires- wiring Joints 6 6. Wiring Systems - House Wiring-Circuits 6 7. Lamps - Wiring Tests - IE. Rules 6 8. A. C. Starters 6 9. Estimation of Lighting & power load 6 10 Estimation of residential building Earthing 6 12 Measuring Instruments 6 OBJECTIVES 1. Basics of Electrical Engineering 1.1 Define ohm's Law, Electric current 1.2. conductors Examples : copper,aluminium,etc 1.3. insulators Examples : rubber.wood,pvc,etc Semi conductors- Examples: germanium.silicon, etc 1.5 Define Electric potential-resistance 1.6.Resistances in series and parallel- formulas-simple problems Definitions of work, power & energy, formulas. 1.8.simple problems on power & energy problems on energy consumption and monthly billing.

3 2.Batteries - Safety Precautions - First Aid 2.1 Cells: primary cells - secondary cells 2.2. lead acid cell construction and working 2.3.efficiencies of cells, defects in cells 2.4. charging methods 2.5. Care & maintenance of Battery 2.6.Applications of batteries. 2.7.Precautions to be taken of various stages (while handling tools, during wiring etc) Electric fire-precautions against shocks. 2.9.first aid - artificial respiration. 3. Wiring instruments - Accessories 3.1. Wring instruments: uses, sizes and handling precautions of various wiring tools (Screw driver, combination pliers, Hammer, electrician knife, hand saw, chisels, try square,poker,gimlet,hand drill,rawal plugtool,hack saw.files,ratchet brace, auger bit, plumb bob, pin vice, pipe vice, bench vice, hand vice,center punch,pipe wrench,mallet,blow lamp, spanner sets-double ended, ring spanner, slide wrench, box spanners, crimping tool, measuring tape, neon tester,reamer,wire stripper&cutter,pipe cutter, die set,wire gauge etc.) 3.2. Wiring Accessories: Switches-tumbler switch,flush type oneway switch,two way switch,bed switch,pull switch,rotary switch,,knife switches various types of switch boards 3.4. lamp holders pendent holder,batten holder,screw lamp holder,angle holders ceiling roses two plate type and three plate type round blocks - socket outlets - plug tops 3.7.I.C.D.P, I.C.T.P, I.C.T.P.N main switches - distribution boards. 4. Soldering, Fuses and MCB 4.1.Familiarisation and use of various soldering tools and components 4.2 Fuses: Defini tion - Calculation of Fuse Rating,Fuse Materials 4.3.various types of Fuses (kit-kat fuse,hrc fuse) 4.4.MCB - current rating of MCB, type of MCB 4.5.Differences between fuse and MCB 5. Wires- wiring Joints 5.1.Wires- types of wires - VIR, PVC, CTS/T.R.S., Lead Sheathed, weather proof, flexible wire, copper & Aluminium wires- specifications 5.2 Wire-Jointing- Detailed procedure for straight Joint-Married Joint - T. Joint - Pig tail Joint.-western union joint. 6. Wiring Systems - House Wiring - Wiring Circuit

4 6.1 Wiring Systems: Energy distribution Systems Single phase and three phases 6.2.Distribution Board System - T. System - Tree System Loop-in- System - Advantages - Disadvantages. 6.3 Lamp circuits incorporating mainswitch, energymeter, fuse cut-out and distribution box 6.4. House Wiring: Selection of wiring - C.T.S. Wiring casing and capping - conduit wiring (Concealed and surface) 6.4.Wiring Circuits: Simple Lamp circuits - staircase wiring - Corridor wiring Lodge wiring - Go down wiring 7. Lamps - Wiring Tests - I.E. Rules 7.1 Fluorescent lamp circuit Use of starter and choke. 7.2.Wiring Tests: Megger Tests - Continuity Test - Insulation Test - Polarity Test Earthing system test IE. Rules: I.E. Rules Regarding Internal wiring - Earthing - Power circuit wiring. 8. A.C. Motors - Starters 8.1 A.C. Motors: 1-phase Motors - Split Phase Motors - Capacitor Motors - Universal Motors - Shaded pole Motors phase Motors - construction of 3-phase Induction Motors A.C. Starters: Necessity of starter - Construction and working of D.O.L. Starter - Star-Delta Starter. 9. Estimation of Lighting & power load 9.1.To prepare Estimation for Residential Buildings, offices, Commercial Shops: 9.2. Estimation of Load - Determination of No. of Sub-Circuits - distribution of Load over sub circuits 9.3. Calculation of Rating of Cable - Length of cable preparation of material schedule along with their cost in standard Performa 9.4. Length of Batten / PVC Pipe 9.5 Labour cost - Illumination required at various working places. 10. Estimation of Residential building Draw the wiring layout of a Residential building with 2 bed room house and 3 bed room houses. Calculate the quantities and cost of all the materials required for it Draw the wiring layout of an office building. Calculate the quantities and cost of all the materials required for it Draw the wiring layout of workshop. Calculate the quantities and cost of all the materials required for it. 11. Earthing: 11.1.Necessity of Earthing 11.2 list the materials that are to be used in the earth pit surrounding the earth electrode.

5 11.2. Methods of Earthing - Pipe Earthing - Plate Earthing - procedure Select the suitable type of earthing for a given installation 12. Measuring Instruments Connection of Ammeter and voltmeter connection of Wattmeter, Energy meter, Earth resistance meter, Megger and Multimeter. COURSE CONTENTS 1. Basics of Electrical Engineering OHM's Law: Electric current - conductors insulators, semi conductors- Electric potential-resistance- - Resistances in series and parallel- simple problems-definitions of work, power & energy. simple problems on power & energy - problems on energy consumption and monthly billing. 2.Batteries - Safety Precautions - First Aid Cells: primary cells - secondary cells - lead acid cell construction and working -efficiencies of cells, defects in cells - charging methods Care & maintenance of Battery- Precautions to be taken of various stages (while handling tools, during wiring etc)- Electric fire-precautions against shocks-first aid artificial respiration. 3. Wiring instruments - Accessories Wring instruments: uses, sizes and handling precautions of various wiring tools (Screw driver, combination pliers, Hammer, chisels, hacksaw, die set wire gauge etc.) Wiring Accessories: Switches,different types of switch boards - lamp holders - ceiling roses - round blocks - socket outlets - plug tops I.C.D.P, I.C.T.P, I.C.T.P.N main switches - distribution boards. 4. Soldering, Fuses and MCB Familiarisation and use of various soldering tools and components- Fuses- defini tion - Calculation of Fuse Rating - Fuse Materials - various types of Fuses MCB - current rating of MCB, types of MCB-Differences between fuse and MCB 5. Wires- wiring Joints Wires- types of wires - VIR, PVC, CTS/T.R.S., Lead Sheathed, weather proof, flexible wires, copper & Aluminium wires - specifications Wire-Jointing- detailed procedure for straight Joint-Married Joint - T. Joint - Pig tail Joint. 6. Wiring Systems - House Wiring - Wiring Circuit Wiring Systems: Energy distribution Systems Single phase and three phases - Distribution Board System - T. System - Tree System Loop-in- System - Advantages - Disadvantages.

6 Lamp circuits incorporating mainswitch, energymeter, fuse cut-out and distribution box House Wiring: Selection of wiring - C.T.S. Wiring casing and capping - conduit wiring (Concealed and surface) - Comparison of different types of wirings. Wiring Circuits: Simple Lamp circuits - staircase wiring - Corridor wiring Lodge wiring - Go down wiring 7. Lamps - Wiring Tests - I.E. Rules Fluorescent lamp circuit Use of starter and choke..wiring Tests: Megger Tests - Continuity Test - Insulation Test - Polarity Test Earthing system test. IE. Rules: I.E. Rules Regarding Internal wiring - Earthing - Power circuit wiring. 8. A.C. Motors - Starters A.C. Motors: 1-phase Motors - Split Phase Motors - Capacitor Motors - Universal Motors - Shaded pole Motors - 3-phase Motors - construction of 3-phase Induction Motors - Working. A.C. Starters: Necessity of starter - Construction and working of D.O.L. Starter - Star-Delta Starter. 9. Estimation of Lighting & power load To prepare Estimation for Residential Buildings, offices, Commercial Shops: Estimation of Load - Determination of No. of Sub-Circuits - Distribution of Load over sub circuits - Calculation of Rating of wire- Length of Batten / PVC Pipe - Length of wire preparation of material schedule along with their cost in standard Performa - Labour cost - illumination required at various working places. 10. Estimation of Residential building. Draw the wiring layout of a Residential building with 2 bed room house and 3 bed room houses. Calculate the quantities and cost of all the materials required for it. Draw the wiring layout of an office building. Calculate the quantities and cost of all the materials required for it. Draw the wiring layout of workshop. Calculate the quantities and cost of all the materials required for it. 11. Earthing: Necessity of Earthing - Methods of Earthing - Pipe Earthing - Plate Earthing list the materials required for earthing- Select the suitable type of earthing for a given installation 12. Measuring Instruments Connection and use of Ammeter, Voltmeter, Wattmeter, Energy meter, Earth resistance meter, Megger & Multimeter.

7 Periods per week: 18 Total Periods: 216. Max. Marks: 70 Practical s Electrical House Wiring Lab Study the electrical wiring tools and electrical wiring accessories. 1. Measurement of power of an Appliance / Circuit, connection of ammeter, voltmeter and wattmeter. 2. Determining the Fusing Current of a fuse, replacement of fuse wire and fuse 3. Study the service connection from electric pole to energy meter. 4. Practice of electrical wiring Joints i) perform straight joint ii) perform married joint iii) perform T joint iv) perform pigtail Joint 5. Testing and charging of cells 6. Practice of Conduit wiring on i) One lamp controlled by one SPT switch ii) Two lamps controlled by two switches iii) Stair case wiring iv) Corridor wiring v) Master Circuit vi) Lodge wiring vii) Go down wiring viii) Tube light wiring 7. Lamp circuits incorporating main switch, energy meter, fuse cut-out and distribution box. Preparation of different running light circuits 8. Soldering practice solder simple wiring circuits. 9. Practice on concealed and surface wiring 10. Measurement of Insulation Resistance of wiring Installation by using megger 11. Continuity and polarity tests by using Megger 12. Measurement of Earth Resistance by earth Megger 13. Installation of pipe and plate Earthing 14. Connecting, starting of running and reversing of a single-phase capacitor motor. 15. Connecting, starting and running of universal motor

8 16. Connecting, starting and running of commutator motor 17. Study of D.O.L. & Star/Delta starters 18. Fault location and rectification of D.O.L. & Star/Delta starter. 19. Identification of the terminals of 3-phase Induction Motor 20. Connecting, Starting, running and reversing of 3-phase squirrel cage Induction motor 21. Work out measurements of a building or a shop and prepare the list of items for wiring. 22. Prepare the specifications list of items required for working 23. Estimate the cost of materials required as per market rate 24. Estimate labour charges as per the market schedules. 25. Prepare and estimate for starting a small work shop for submitting to a Bank for loan 26. Estimate the cost & quantity of all the electrical accessories required for the 2 bed room house 27. Know the procedure of first aid for shock treatment for electrocuted person. 28.Prepare extension board with indicator, fuse and 2/3 pin socket.

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