| Aali IV - Electrical Trade |
| Weekly Time Table |
|
| Class |
Trade Theory |
Electronic Technology |
Engineering Drawing |
Maths |
Science |
Practical |
Total |
| Aali I |
2 |
- |
2 |
1 |
1 |
4 |
10 |
| Aali II |
2 |
- |
2 |
1 |
1 |
4 |
10 |
| Aali III |
2 |
2 |
- |
1 |
1 |
4 |
10 |
| Aali IV |
3 |
- |
- |
- |
- |
*7 |
10 |
*4 for Practicals & 3 for Project |
| Topics..... |
» Trade Theory & Practical
» Laboratory Work |
| |
| |
| Trade Theory and Practical:- |
| Periods |
Total Periods per Year : 60 |
Periods per Week : 2 |
| Trade / Subject |
Electrician cum Wireman |
Trade Theory and Practice |
|
| UNIT 1 |
| Introduction to estimates, Estimation of materials for simple wiring circuits, Estimation of materials for wiring circuits used in 2-3 bedrooms residential flats. Use of reference books and tables such as SWG table, table giving current rating of 1-phase & 3-phase motors, current rating of fuse wire etc. |
UNIT 2 |
| Constructional features of transformer, Working principle of a transformer, EMF equation, voltage, current and turn ratios, Rating of Transformer, different cooling methods, General procedure of testing a new transformer before commissioning. Care & maintenance of transformer. |
| UNIT 3 |
| Construction of 3-phase and 1-phase induction motor. Working principle of 3-phase induction motor. Squirrel cage & Slip ring rotor constructions. Use of capacitor in single-phase induction motors. Description and internal connection of Direct on line & Star delta starters. Internal arrangement of a motor resistance starter for Slip ring induction motor. |
| UNIT 4 |
| Electrical measuring instruments, Moving coil, Moving iron and Dynamometer type, their working principles, uses. Difference between ammeter & voltmeter, Single-phase and 3-phase energy meters, Megger, Digital and Analog Multimeters, Wattmeters. |
| UNIT 5 |
| Common faults, cause and remedies in domestic and industrial wiring installations, Method of locating the faults. Maintenance and routine tests for installation. Wiring including earthing of different domestic appliances e.g. Electric heater, Air circulator, Water heater, Washing machine, Refrigerator, Resistance ovens, Geysers, Signalling Equipments and Indicators, Fire & burglar alarms, Electric clocks etc. |
Books Recommended :
» Electrical Design Estimating and Costing by S.K. Bhattacharya.
» Fundamentals of Electrical Engineering by Ashaque Husain.
» Electrical Estimating & Costing by N. Alagappan & S. Ekambaram.(Tata Mc. Graw Hill).
» Maintenance & Repair of Domestic Appliance by NCERT.
» Maintenance & Repair of Electric Motors by NCERT. |
| Δ TOP Δ |
| |
| Laboratory Work :- |
| Periods |
Total Periods per Year : 120 |
Periods per Week : 4 |
| Trade / Subject |
Electrician cum Wireman |
Laboratory Work |
|
| |
ELECTRICAL |
| 1. |
Assembling and testing of a 300 watt. Auto-cut Manual T.V. Stabilizer. |
| 2. |
Assembling and testing of a 500 watt. Automatic stabilizer for Refrigerator. |
| 3. |
Estimating and Costing of a two bedroom set (according to plan supplied) of an Apartment including labour charges complete with specification of material required. |
| 4. |
Winding of a tube-light choke. |
| 5. |
Winding of a Ceiling fan. |
| 6. |
Winding of a Single phase electric motor upto 1 h.p. |
| 7. |
Practice of repair of Electric appliances like Electric iron, Kettle, Mixi, Room Heater etc. |
|
| Δ TOP Δ |
