Elec. Installation, Planning & Estimating Syllabus Diploma in Electrical Engineering, Regulation 2010, Short Suggestion, Exam Dates, Exam Routine, Question Out, Book list with code

To provide the student with an opportunity to acquire knowledge, skill and attitude in the area of planning and estimating of electrical installation with special emphasis on:

  • Planning and preparation of estimate for an electrical installation.
  • Internal wiring and service connection.
  • Installation of electrical machines.
  • Electricity act / rules and safety practices.

 

SHORT DESCRIPTION

Planning and estimating; Measurement book, price sheet, catalogue and schedule of labor rate; Illumination; Conductor size and current carrying capacity; Electricity Acts/Rules; Electrical codes; Internal wiring installation; Distribution line; Installation and winding of electrical machine/equipment; Testing electrical installation.

 

DETAIL DESCRIPTION

 

Theory:

 

PLANNING AND ESTIMATING

  • Understand the concepts of electrical installation.
    • Explain electrical installation.
    • List at least three main types of electrical installations.
    • Define indoor and outdoor electrical installation.
    • Distinguish between indoor and outdoor electrical installation.

 

  • Understand the concept of planning of an electrical installation.
    • Define the term planning of an electrical installation.
    • Explain the necessity of planning of an electrical installation.
    • List at least five main categories of planning of an electrical installation.
    • List at least seven factors to be considered for proper planning.
    • Calculate the electrical load of residential building, college building, student hostel and office building.

 

  • Understand the concept of estimating of an electrical installation.
    • Discuss estimating of an installation.
    • Explain the necessity of estimating.
    • List at least three important steps for costing of an installation.
    • List at least eight steps to be considered for preparing an estimate.

MEASUREMENT BOOK, PRICE SHEET, CATALOGUE AND SCHEDULE OF LABOR RATES

  • Understand the importance of MB writing.
    • Describe MB.
    • Explain the necessity of MB.
    • Identify the style of maintaining an MB.
    • Identify proper specifications for the required materials form catalogue.

 

  • Understand the concept of price sheet and schedule of labor rates.
    • Describe price sheet and schedule of labor rates.
    • Explain the necessity of price sheet and labor rates for an estimate.
    • Prepare a price sheet and a labor rate schedule.

 

ILLUMINATION

  • Understand the concept of illumination.
    • Define illumination.
    • Explain at least three laws of illumination.
    • Calculate illumination required for different purposes.
    • Prepare a chart of illumination for different lamp system (ie including CFL, Incandescent, Florescent )
    • Solve problems related to illumination.
    • Define the terms Solid angle, Candela, Luminous flux, Luminous intensity, MSCP, MHSCP and different related factors.

 

  • Understand the concept of lighting scheme.
    • Discuss direct lighting, indirect lighting, semi-direct and semi-indirect lighting.
    • Discuss the level of illumination required for different purposes.
    • Discuss at least five factors to be considered for designing a lighting scheme.
    • Design a lighting scheme.

 

CONDUCTOR SIZE AND CURRENT CARRYING CAPACITY

  • Understand the principle of calculating current carrying capacity and determining the conductor size.
    • Describe at least three factors to be considered for determining the conductor size.
    • Identify the conductor size from the table.
    • Calculate the current carrying capacity of a given circuit and the sub circuits.

 

 

 

ELECTRICITY ACTS /RULES

  • Understand the electricity Act/Rules and safety practices.
    • List at least ten main electricity rules of Bangladesh Electricity Act.
    • Describe the importance of electricity act/rules.
    • Explain the need for maintaining safety procedure against electrical hazards.
    • Explain at least five of safety measures.

 

ELECTRICAL CODES

  • Understand the utility of electrical codes.
    • List at least ten electrical codes.
    • Explain different electrical codes.
    • State the advantages of using the electrical codes.

 

INTERNAL WIRING INSTALLATION

  • Understand the installation of internal wiring.
    • Explain internal wiring installation.
    • Describe at least three main types of internal wiring.
    • Prepare schedule of materials for batten, channel, surface conduit, and concealed conduit wiring.
    • Sketch the layout plan for batten, channel, surface conduit, and concealed conduit of small building.
    • Calculate the load of main circuit and sub circuits.
    • Select the sizes of wire, main switch, sub-main switches and switches.
    • Prepare a detail estimate for necessary materials and labor of installation of internal wiring.
    • Prepare a summary of the estimate.
    • Prepare an estimate by point method.

 

  • Understand the concept of earthing.
    • Describe earthing.
    • Explain the necessity of earthing.
    • Explain at least three methods of earthing.
    • Prepare an estimate for earthing.
    • Explain the method of testing of an earthing installation.
    • List the desired value of earth resistance for different installations.

 

13        Understand wiring layout and schematic diagram of an electrical installation.

13.1     Sketch the layout plan for casing wiring of a small workshop showing lighting loads.

13.2    Sketch the layout plan for conduit wiring of a small workshop showing lighting loads.

13.3    Sketch the layout plan of casing wiring of the same workshop showing power loads.

13.4     Sketch the layout plan of conduit wiring of the same workshop showing power loads.

13.5     Sketch the layout plan for service connection showing the required energy meter, DB & SDB.

13.6     Sketch the layout plan for earth connection.

13.7     Calculate power loads and lighting loads respectively of main circuit and sub-circuits.

13.8     Select the sizes of wire, main switch, sub-main switches, switches and distribution boards to lighting and power line respectively.

13.9        Prepare an estimate for the required materials and labour from the schedule.

13.10   Prepare an estimate for earth connections and earthing.

13.11   Prepare a summary of the estimate.

 

DISTRIBUTION LINE

14        Understand the estimate of LT overhead distribution line.

14.1     Sketch the layout plan of a 400V, 3-phase, 4-wire overhead distribution line with street poles, conductors, insulators and other accessories.

14.2     Prepare a schedule of materials required for overhead line.

14.3     Prepare an estimate for required materials for one kilometre long overhead LT distribution line with the 5th wire for street lighting.

14.4     Prepare a schedule of labor for overhead LT distribution line.

14.5     Prepare an estimate for overhead LT distribution line.

14.6     Prepare a summary of the estimate.

 

 

INSTALLATION OF ELECTRICAL MACHINE/ EQUIPMENT

15        Understand the principle of installation of electrical machine and equipment.

15.1     Sketch the layout plan and single line wiring diagram of a motor connection

15.2     Identify the position of motor, main switch, starter and accessories in the diagram.

15.3        Calculate the distance of the motor, main switch and starter from the mains.

15.4        Determine the sizes of wire, main switch and starter for the installation.

15.5     Prepare the material cost.

15.6     Estimate labor charge.

15.7     Prepare the estimate adding contingencies .

 

16        Understand the principle of installation of substation.

16.1     Sketch the layout plan and single line diagram of a substation.

16.2        Identify the position of the transformer, circuit breaker, auto re-closer, lightning arrester, isolator and incoming and outgoing bus bar arrangement.

16.3     Prepare a schedule of materials required.

16.4     Prepare an estimate.

 

TESTING ELECTRICAL INSTALLATION

17        Understand the principle of testing of electrical installation.

17.1     Describe at least five main tests to be carried out after completion of wiring of a building.

17.2     Describe the tests to be performed after installation of a motor.

17.3     Describe the tests to be performed after installation of a transformer.

 

  1. Apply the principle of winding of electrical machine.

18.1     Sketch the developed diagrams of full pitch and fractional pitch winding of a three-phase induction motor.

18.2     Sketch the developed winding diagram of a single phase induction motor.

18.3     Estimate the required materials and costs for rewinding of a burnt out induction motor.

18.4     Describe the methods of testing winding of electrical machine.

Practical:

 

  • Measure the illumination level of a surface.
    • Select the lumen meter.
    • Measure the illumination level in your wiring lab/ class room.
    • Compare the obtained reading with the calculated value.

 

  • Plan and estimate for electrification of a class room.
    • Sketch the layout plan and single line wiring diagram of a class room.
    • Sketch the wiring and circuit diagram.
    • Indicate the positions of electrical fittings in the plan.
    • Find out the sizes of wire and main switch from the calculated load of main circuit and sub-circuits following electricity rules.
    • Measure the distances of fittings from the main board & BDB and find out the length of the wire.
    • List the materials in the schedule and find out the cost.
    • Add labor charges from the schedule with material cost for the summary of estimate.

 

  • Plan and estimate for electrification of a single storied residential building.
    • Sketch the layout plan of a single storied residential building of about 1250 square feet plinth area in a three katha land with boundary wall and gate showing the position of electric pole for service connection.
    • Sketch the wiring and circuit diagrams and show the service connection.
    • Show the positions of electrical fittings in the plan.
    • Find out the size of wire, main switch, BDB, fuse or MCB from the calculated load of circuit and sub circuit.
    • Measure the distance of the fittings from the board to find out the length of wires.
    • List the materials in the schedule of materials and find out the cost.
    • Add labor charge from the schedule with the material cost for the summary of the estimate.

 

  • Plan and estimate for electrification of a multistoried building.
    • Sketch the elevation and floor plan of the building.
    • Sketch the wiring and circuit diagrams of a flat.
    • Show the positions of the fittings in a flat.
    • Find out the size of wires, main switch, fuse or MCB.
    • Measure the distance of the fittings from the board to find out the length of wire.
    • Identify the rising main and power distribution system.
    • Prepare the estimate for electrification of the building.

 

  • Plan and estimate for electrification of an electrical machine shop.
    • Sketch the layout plan and single line wiring diagram of the shop.
    • Sketch the wiring and circuit diagrams.
    • Indicate the positions of the fittings in the plan.
    • Find out the size of wires, main switch, fuse or MCB.
    • Measure the distance of the fittings from the board to find out the length of wire.
    • List the materials in the schedule of materials and find out the cost.
    • Add labor charge with the cost of material for the summary of estimate.

 

  • Perform Channel wiring.
    • Sketch the layout plan.
    • Sketch the wiring and circuit diagrams.
    • Indicate the positions of the fittings.
    • Find out the size of wire, main switch, fuse/MCB.
    • Measure the distance of the fittings from the main switch.
    • Estimate the cost including labour charges.
    • Mark the position of the fittings.
    • Fix up the rowel plugs on the wall.
    • Fix up boards and casing on wall.
    • Fasten wires.
    • Fix up switches and outlets.
    • Fix up the energy meter, cut-out MCB and main switch.
    • Connect power supply.

 

  • Test an electrical installation (machine/equipment) before commissioning.
    • Select the machine/equipment to be tested.
    • Test continuity of the winding of the machine/equipment by AVO meter.
    • Test the insulation resistance within the coils by Megger.
    • Test the insulation resistance with the coils and body of the machine/equipment by Megger.
    • Measure the resistance of the earth point which will be connected to the body of the machine/equipment.

8          Determine cable size from cable catalogue.

8.1       Calculate the load of main circuits and sub-circuits of different installations.

8.2       Find out the corresponding suitable cable size from the catalogue allowing safety factor.

 

  1. Install a single phase/three phase service connection.

9.1       Sketch the layout plan showing single line service connection from the nearest pole to the service entrance of the building.

9.2       Determine the total electrical load of the installation.

9.3       Measure the distance from the meter at premises to the nearest electric  pole.

9.4       Prepare the material cost.

9.5       Add labor charges.

9.6       Add contingencies

9.7       Add lump sum for petty stores like cement, bricks and sand etc.

9.8       Prepare the summary of estimate.

9.9       Procure the materials and hand tools.

9.10     Fix up brackets, service pipe and insulators.

9.11     Draw two GI guard wires with carlings (use draw vice).

9.12     Draw the single core PVC wires through the pipe up to the meter inside the premises.

9.13     Connect one aerial fuse with the phase.

 

10        Perform the installation of three phase induction motor.

10.1        Sketch the layout plan and single line wiring diagram of the motor connection.

10.2     Indicate the position of the motor, main switch and starter.

10.3     Measure the distance of the motor, starter and main switch from the supply main.

10.4     Find out the sizes of wires, main switch and starter.

10.5     Prepare the material cost.

10.6        Add labor charges with the cost of materials for the summary estimate.

10.7     Add contingencies.

10.8     Following electricity rules, connect the mains and operate the motor.

10.9     Install the components and connect to the power source and observe the performance.

  1. Re-wind of a single phase induction motor

11.1     Calculate the size of conductor, number of coils and number of turns in a coil.

11.2     Sketch the develop winding diagram of the induction motor.

11.3     Make necessary grouping on the basis of the layout plan for winding.

11.4     Find out the types and sizes of wire required for the winding.

11.5     Determine the number of turns required on the basis of the coil grouping per phase and layer of winding.

11.6     Estimate the cost involved to rewind the motor.

11.7     Collect required tools and materials to rewind the motor.

11.8     Rewind the motor.

11.9     Energize the motor after performing necessary tests.

11.10   Measure the RPM of the motor.

 

  1. Re-wind a three phase induction motor.

12.1     Calculate the number of coils, size of conductor and number of turns in a coil of the motor.

12.2     Sketch the developed diagram for winding of the induction motor.

12.3     Make necessary grouping of coils.

12.4     Find out the types and sizes of wire required for the windings.

12.5     Determine the number of turns required on the basis of the coil grouping per phase and layer of winding.

12.6     Estimate the cost involved to rewind the motor.

12.7     Collect required tools and materials to rewind the motor.

12.8     Rewind the motor performing all the steps sequentially.

12.9     Energize the motor after performing necessary tests.

12.10   Measure the RPM of the motor.

 

 

  1. Perform Installation of an earthling.

13.1     Select earth electrode, earth continuity conductor & other nedcssary materials.

13.2     Place the earth electrode into the ground after digging hole.

13.3     Put coal & salt into the hole.

13.4     Take out the continuity conductor from the earth electrode.

  1. Prepare plan and estimate of a short distribution line.

14.1     Take the measurements of the route of the proposed distribution line.

14.2     Sketch the route showing substation, pole and consumer.

14.3     Prepare estimate.

 

REFERENCE BOOKS

  1. Electrical Installation Planing & Estimating

–          J. B. Gupta.

  1. Electrical Installing Planning and Costing

–          Uppal.

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