MEP201 Mechanical Engineering Drawing 1st semester 2005-06 S R Kale Lecture Wiring Drawings

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)

Wiring drawings Input information Wiring outputs Teams of 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)

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

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)

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)

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

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)

Wiring Elements Switch, Fuse, Meters, Relays, Circuit breakers, … 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)

Domestic wiring E L N M Wiring (2005)

Domestic Wiring ARCHITECTURAL DRAWING/LAYOUT Wiring (2005)

Domestic Wiring MCB Wiring (2005)

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)

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

Industrial wiring Wiring (2005)

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)

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)