COURSE TITLE COURSE CODE COURSE CATEGORY PERIODS/WEEK PERIODS/SEMESTER CREDITS
: ELECTRICAL DESIGN AND ESTMATING : 4037 : A : 4 : 72 :4 TIME SCHEDULE
MODULE I
II
III
IV
TOPIC Design of illumination Lamps Test Test I Selection of cable Estimate of domestic wiring Est. of power wiring Service connection Test Test II Est. of LT line Est. of HT line Est. UG cable Test Test III I E Rules regarding spacing Est. of 2.pole mount substation Est. of 4.pole mount substation Substation Earthling Test Test IV Total
PERIODS 16 1 18 1 18 1 16 1 72
Rationale This subject is intended to teach the students about various aspects of Design of illumination and flood lighting, estimate the cost of materials in Domestic Wiring, Draw and estimate Power Circuit Wiring, Design of Distribution Lines (HT<) and Estimation of Substations. This will also enable them to use knowledge for preparing estimation of this installations, requirement of the circuits, develop the skill of designing, etc. OBJECTIVES MODULE – I 1.1.0 Know the concepts of illumination 1.1.1 Define terms – illumination flux, luminous intensity, illumination luminous, and their units 1.1.2 Study laws of illumination 1.1.3 Study various lighting schemes – Direct, indirect, semi direct and semi indirect. 1.1.4 Understand illumination levels required at various places as per I.S. 1.1.5 Study terms used for design of lighting schemes - Space to Height ratio, Depreciation
1.1.6 1.1.7 1.1.8 1.1.9
Factor, Maintenance Factor and Utilization Factor Study different methods of lighting calculation watt per square meter method Determine no. of lamps required to illuminate various types rooms, halls etc and draw the lighting arrangements Explain the principles, working and diagram of sodium vapour lamps Draw the diagram of Mercury vapor lamp, neon lamp and fluorescent lamps
MODULE – II 1.1.0 Prepare the estimate and cost of materials in Domestic Wiring 2.1.1 Define estimate 2.1.2 Study the specification and essential elements of wiring 2.1.3 Study different types of wires and wiring systems in use 2.1.4 Know the specification of cables as per IS codes 2.1.5 Understand general I.E rules regarding internal wiring 2.1.6 Calculate the conductor size and understand the consideration which determines the size 2.1.7 Study the current ratings of copper and aluminium cables (chart) 2.1.8 Study different types of switches, holders etc used for wiring 2.1.9 Define – Circuit and sub circuit 2.1.10 Determine sub circuit 2.1.11 Draw the layout, wiring diagram and prepare the estimate and cost of materials used for internal wiring of different buildings in surface and concealed conduit system 2.2.0 Draw and estimate Power Circuit Wiring 2.2.1 Study earthing and its purpose 2.2.2 Know various types of earthing 2.2.3 Study IE rules regarding earthing systems 2.2.4 Prepare the estimate and cost of materials used for a standard pipe and plate earthing 2.2.5 Understand IE rules regarding power wiring circuits 2.2.6 Prepare estimate of materials and cost for wiring domestic pump set, irrigation pump set etc, working in single phase and 3 phase supplies 2.2.7 Prepare estimate and cost of materials for the control panel and wiring small workshop with the given capacity of machines 2.2.8 Know the Concept of design industrial bus-bar system 2.2.9 Prepare estimate and cost of materials required for giving 1 phase service connection without extension of Overhead lines 2.2.10 Prepare estimate and cost of materials for 3 phase service connection from the existing lines 2.2.11 Prepare the estimate and cost of materials used for 1 phase and 3 phase service connection using Underground cables MODULE – III 3.1.0 Design Distribution Lines (HT<) 3.1.1 Study various materials used for distribution lines 3.1.2 Prepare estimate and cost of materials for extending single phase OH distribution line 3.1.3 Prepare estimate and cost of materials for extending 3 Phase OH distribution line 3.1.4 Prepare estimate and cost of materials for street lighting using Overhead and Underground cables 3.1.5 Prepare estimate and cost of materials for extending an existing 11 kV Overhead line
MODULE – IV 4.1.0 Estimation of Substations 4.1.1. Study various components of pole materials and substation and their costs 4.1.2. Study IE rules regarding spacing clearance etc
4.1.3. Prepare the estimate and cost of the materials for erecting a 2 pole mounted distribution substation 4.1.4. Prepare the estimate and cost of the materials for a 4 pole mounted substation 4.1.5. Understand the substation earthing COURSE CONTENT MODULE - I Design of illumination and flood lighting. Define terms used in illumination – laws of illumination - various lighting schemes – illumination levels for various places – Space Height ratio – Utilization Factor - Depreciation Factor, Maintenance Factor –Design of lighting schemes for various rooms – arrangement of lamps – design of flood lighting scheme-Types of lamps – incandescent lamps --Gas filled lamps – advantages over vacuum lamps – types of gases used – Arc lamps – principle and uses - Halogen lamps – CFL working and uses - Discharge lamps –sodium lamps – Mercury vapor lamps (High pressure and low pressure types) Neon lamps – Fluorescent lamps and the field of application of each MODULE – II Introduction – define estimate – essential elements - calculation of conductor size – current ratings of copper and Aluminium cables - single core- wiring accessories – circuit – sub circuit - general rules regarding internal wiring – preparation of layout, wiring, diagram and estimates for house, office buildings, schools, cinema theatre etc Industrial wiring and estimation Earthing – purpose- rules regarding earthing as per IS – estimation of materials used for a standard pipe - earthing and plate earthing – costing Rules regarding power circuit wiring – estimates and cost of materials regarding wiring pump set in single phase and 3 phase systems – estimation and costing of control panel & wiring of small workshops - design factors – current density of copper and aluminium – conductor size – estimation and costing of service connection (single phase and 3 phase systems) –Underground cables and Overhead lines MODULE – III Overhead Lines Extension of Overhead lines – Prepare estimate and cost for extending single phase Low tension - distribution lines – 3 phase distribution lines – street lighting using O.H lines – U.G cables – Estimate and costing of 11 KV O.H line extension. MODULE IV Estimation of Substations Estimation of sub station – IE rules regarding spacing of conductor - distance from building etc – materials used for erecting 11 KV substation – Preparation of the distribution sub station – 4 pole mounted sub station – Substation earthing REFERENCE 1) Electrical estimating and costing - M.L. Gupta 2) Electrical estimating and costing - Sujith singh 3) Electrical Installation estimating and costing – J.B. Gupta 4) Technical hand book of KSEB engineers association 5) Electrical Engg. Data from electrical inspectorate
