The course is aimed at providing skill in the use of tools and machines of common usage, to enable the student to develop simple projects related to wiring, welding, metal work and wood working. Related safety concerns while working on the job, forms an integrated part of the course. Necessary information about the types, materials, tools/machines may be provided as shop-talk. However, for wiring, separate theory classes will provide the essential background knowledge of electrical rules and regulations.
1 ELECTRICAL WIRING (10 Hrs.)
1.1 House Wiring.
1.1.1 Types and sizes of wiring cables according to voltage grade, core and
strands, Insulation.
1.1.2 Wiring accessories and cables current carrying capacity.
1.1.3 Wiring system (PVC and steel conduit, channel and cable wiring, cleat,
Batten, casing and cable wiring)
1.1.4 Protection of house wiring.
1.1.4.1 Fuse (rewirable, cartridge, H.R.C).
1.1.4.2 Miniature circuit breaker.
1.1.4.3 Earthing.
1.1.5 Distribution board.
1.1.6 Testing of wiring.
1.1.7 Electricity rules about domestic wiring and earthing.
1.1.8 Voltage drop in cables and its simple calculation.
1.2. Industrial and commercial wiring. (5 Hrs.)
1.2.1 Power wiring system.
1.2.1.1 Steel conduit.
1.2.1.2 Trunking and Ducting system.
1.2.1.3 Catenary system.
1.2.1.4 Tough sheathed cable system.
1.2.1.5 Special purpose cable (heat resistant, fire retarding, welding cable
etc).
1.2.2 Three phase power distribution board.
1.2.3 Multistory distribution board.
1.2.4 Cable and fuse / circuit breaker size for motor.
1.2.5 Study and use of magnetic contactors, push button & thermal overload
2 ELECTRICITY RULES AND REGULATIONS. (5 Hrs.)
2.1 Pakistan electricity rules 1973.
2.1.1 Condition of supply by license (rule no. 25, 28, 29, 32, 40, 46).
2.1.2 General precaution for safety of public (Rule 49,51,52,57,58).
2.1.3 Electrical supply line and apparatus (Rule 60, 61, 62, 64).
2.2 I.E.E Regulation for Building installation. (5 Hrs.)
(Institute of Electrical Engineers, London).
2.2.1 (Section-A).
Regulation No. and its brief description.
A-1 Control of supply to consumer’s Installation.
A-3 Excess current protection.
A-26 Final Sub-circuits of rating exceeding 15 A
2.2.2 Section B.
B-4 Type of flexible cables and flexible cords.
B-12 Choice of types of insulation and protective covering of flexible conductor
sizes.
2.2.3 Section C
C-4 Selection for situation.
C-6 Damp situation.
2.2.4 Section D
D-1 Methods of protection.
D-22 Protection by fuse and current circuit Breaker for excess current.
3 FACTORY ACT. (2 Hrs.)
3.1 Workers compensation act.
3.1.1 Report of Fatal Accidents.
3.1.2 Medical Exam.
3.1.3 Injury and diseases.
3.1.4 Amount of Compensation payable to workman.
3.2 Safety. (5 Hrs.)
3.2.1 Fire causes and its prevention, classes of fire.
3.2.2 Safety in electrical shops (Safety Belt, Gloves, clothing and shoes).
3.2.3 General safety precaution (Machine Guards, tools & ladders).
3.2.4 Electric shock its prevention and treatment.