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MEP201 Mechanical Engineering Drawing 1 st semester 2005-06

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This document provides an extensive examination of electrical wiring drawings and their applications in various mechanical systems. Topics covered include power delivery to industrial equipment, computer systems, and safety protocols such as fire wiring. The information includes schematic drawings, equipment layouts, and detailed wiring diagrams for various applications like motors, generators, and lighting. Emphasis is placed on wiring construction materials, types of diagrams, and proper routing techniques to ensure safety and efficiency in electrical system design.

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MEP201 Mechanical Engineering Drawing 1 st semester 2005-06

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  1. MEP201Mechanical Engineering Drawing1st semester 2005-06 S R Kale Lecture Wiring Drawings

  2. Wiring - Applications • Power to equipment (grid, back-up) - motors, generators, arc welding, furnace, lathe, A/C, • Connecting computers or DAS - • Power to computers, instruments, … • Product wiring (industrial/consumer); –P-control IC engine, CNC lathe, Robot, Injection molding m/c, Aircraft (300 km), Automobile, Washing machine,… • Illumination – Domestic, Laboratory, Factory, Office, • Plant – Power plant, refinery, food processing, paper mill, • Safety - fire Wiring (2005)

  3. Wiring drawings Input information • Schematic, P&I drawings • Equipment G.A. drawings • Layout drawings • Logic for interlocks Wiring outputs • Wiring schematic/diagram • Wiring/Cable routing (to scale, with BoM) Teams of Electrical, I & C, civil, engineers Wiring (2005)

  4. Types of wiring • Power supply and transmission • I & C signal • Telephone • Data cables Wiring (2005)

  5. Wiring - Construction Conductor • Copper and Cu -alloys • Aluminum • Optic fiber Sheath (insulation, protection, mechanical strength) • Plastic, PVC • Armored • Fabric Diameter, single-multi core, strand, bend-radius Wiring (2005)

  6. Wiring  Piping Similar methodology  Schematic  Line diagram  Use G.A. of equipment + layouts  Prepare routing drawing - 3-D or plan-elevation  Provide supports and joints  Get Bill of Materials Wiring (2005)

  7. Types of wiring diagrams • Wiring schematic (One-line diagram) Power connections • Control system diagram • Interlock wiring / Sequence control wiring • Data bus Wiring (2005)

  8. Power Power Supply - available at one location. Power Demand – supply to each equipment. A.C. No. of phases: 1 or 3 Voltage: 240, 415 V; 3.3, 11, 25, 220, 400, 600 kV Frequency: 50 or 60 Hz.; 400 Hz D.C. ± 3, 5, 6, 9, 12, 14, 24 V (cars, computers, TFT, instruments) ± 1500 V, 500 kV (HVDC) Wiring (2005)

  9. Wiring Elements Wires / Cables Devices Switch, Fuse, Meters, Relays, Circuit breakers, … Equipment Consuming: Lamp, T/L, motor, heater, … Production: Generator, battery, SPV, … Transmission: Transformer, converter, … Wiring (2005)

  10. Domestic wiring E L N M Wiring (2005)

  11. Domestic Wiring ARCHITECTURAL DRAWING/LAYOUT Wiring (2005)

  12. Domestic Wiring MCB Wiring (2005)

  13. Industrial wiring 3 phase, 440 V or more, R-Y-B • Circuit breakers • Relays • Motor starters • Switchgear • Cable size • Transformers • CT, VT • Panel with meters Wiring (2005)

  14. Industrial wiring Layouts and routing (similar to piping) • Cable trench • Cable tray • Cable gallery • Towers Wiring (2005)

  15. Industrial wiring Wiring (2005)

  16. Wiring – Haywire • Missing wires mid-way through construction • Long routing of wires – extra cost • Interference with equipment, piping and structure • Wrong type of cables • Not enough space to lay cables or provide bends Wiring (2005)

  17. Summary Output of wiring diagrams: • Cable sizes and lengths • Routing – cable gallery, cable trench designs • Relay room and cabinets • Electrical panels and cabinets • Switchgear • Scope of supply • Detailing for civil and mechanical works Wiring (2005)

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