Downloading - Curriculum Development Centre, Kalamassery

Module IIIMeasuring Instruments – 10 Hrs.Lamps - 10 Hrs.Earth Measurements – 5 Hrs.Battery – 5 Hrs.Test – 5 Hrs.Module IVVoltage build upMotor & Starter- 15 Hrs.Transformer – 10 Hrs.Test – 5 Hrs.Module VTesting & Commissioning – 10 Hrs.Invertors & UPS- 5 Hrs.Maintenance of household appliances – 20 Hrs.Visit - 5 Hrs.Test - 5 Hrs.COURSE CONTENTSMODULE 1 (70 hours including practical & theory)Safety measures to be observed while working devices used for wireman safety. StandardSymbols of various types of electrical equipments – reading of schematic drawing for powerand control circuit. Wiring tools and accessories. Ohms law and study of voltage, Current,Power, Energy, Resistance, Inductance, Capacitance, Impedance, Power factor. Simplecalculation of current, power, energy and Voltage drop. Series and parallel connection. IndianElectricity rules, 1956-36, 45, 60, 61A, 71, 73. Fuse rewirable and HRC types-Ratings.Selection and grading circuit breakers- MCCB, MCB overload protection. Earth leakageprotection – ELCB principle of operation – standard leakage current rating. RCCBMODULE II (70 hours including practical & theory)Various systems of LT wiring –Types of wires and cables-standard sizes-voltage and currentrating- thump rules for voltage drop in cables. Main switch board, sub switch boards anddistribution, boards-permissible loads-selection of location and standard clearance for mainboard etc. Circuit breakers, MCB’s switch fuse unit, MCBs etc. Standard rating Conduits-Metallic and non metallic types. Permissible numbers of wires in conduits. Wiring of specialequipments, like UPS, Inverters, stand by for computersEtc. Essential factors for wiring high rise building.Earthing systems-Necessity-types standard earthing- selection of location type and size ofearth conductors, minimum number of earth electrodes. Earthing of special equipments52