Table of Content
 

Wireman’s tools

  • PLIERS
  • Care and maintenance of pliers
  • 6 Screwdriver BIS 844 
  • Screwdriver – Philips 
  • Care and maintenance 
  • 7 Neon tester BIS 5579 – 1985 
  • Care and maintenance 
  • 8 Electrician’s knife (Double blade) 
  • 10 Hammer ball pein
  • Care and maintenance 
  • 11 Try –square (engineer’s square) 
  • 12 Firmer Chisel 
  • Care and maintenance 
  • 13 Tenon - saw 
  • Care and maintenance 
  • 14 Wood rasp file 
  • 15 File 
  • Care and maintenance 
  • 16 Plumb bob 
  • Care and maintenance
  • 17 Bradawl square pointed (or poker)
  • 18 Gimlet
  • Care and maintenance 
  • 19 Center punch 
  • Care and maintenance 
  • 20 Mallet 
  • Care and maintenance 
  • 21 Ratchet brace 
  • 22 Flat cold chisel
  • Care and maintenance 
  • 23 Rawl plug tool and big 
  • Care and maintenance 
  • 24 Ring spanner set 
  • 26 Socket (box )spanner 
  • 27 Single ended open jaw adjustable spanner (Fig 27)BIS 
  • 6149 
  • Care and maintenance 
  • 28measuring steel tape (Fig 28)
  • Care and maintenance
  • 29 Hacksaw 
  • 1977 for blades 
  • Care and maintenance 
  • 30 Pincers 
  • Care and maintenance 
  • 31 Hand drill 
  • 32 Portable Electric drilling Machine 
  • Care and maintenance 

Electrical Wiring Accessories 

  • Electrical accessories 
  • Rating accessories
  • Construction of accessories 
  • Mounting of accessories 
  • Surface mounting type 
  • Flush-mounting type 
  • Controlling accessories 
  • Types of switches according to their function and place of use
  • Single pole ,one –way switch
  • Single pole ,two –may switch 
  • Intermediate switch 
  • Bell –push or push-button switch
  • Pull or ceiling switch (Pendent switch)
  • Double pole iron –clad main switch
  • Triple (three)pole iron –clad main switch 
  • Holding accessories 
  • Lamp –holders
  • Bayonet cap lamp –holders 
  • Batten lamp –holders 
  • Angle holders
  • Bracket holders
  • Tube light or fluorescent lamp –holders
  • Edison screw –type lamp –holders
  • Goliath Edison screw-type holders
  • Specification of a lamp –holders 
  • Safety accessories 
  • Types of fuses
  • Kit –kit type fuse
  • Advantages
  • Iron – clad fuse cut outs 
  • Outlet accessories
  • Socket outlet current rating
  • General accessories 
  • Appliance connectors or iron connectors
  • Adaptor 
  • Ceiling roses 
  • Connectors 
  • Distribution board 
  • Neutral link 
  • B.I.S Symbols used for electrical accessories

Cable termination connection

  • Crimp connection 
  • Screw on terminals with loop/ring conductor
  • Connections and terminals 

Joints in electrical conductors

  • Definition 
  • TYPES OF JOINTS 
  • Some of the commonly used joints are listed below
  • Pig –rail/rat-tail /twisted joint 
  • Married joint 
  • Tee joint 
  • Britannia Joint 
  • Britannia Tee joint 
  • Western union joint 
  • Scarfed joint 
  • Tap joint in single stranded conductors of diameter 2mm or less
  • Plain tap joint 
  • Aerial tap joint 
  • Knotted tap joint 
  • Duplex –cross tap joint
  • Double –cross tap joint 

Current carrying capacity of copper & aluminium cables and comparison between solid and stranded cables 

  • Selection of cables 
  • Current rating of cables based on type of protection
  • Coarse excess current protection
  • Close excess current protection 
  • Devices include
  • Rating factor with respect to protection 
  • SOLUTION 
  • ADVANTAGES OF STRANDED CONDUCTORS OVER SOLIDCONDUCTORS

Precautions to be observed while using Aluminum cables

  • Selection of conduit for installation
  • Handling 
  • Skinning of cables 
  • Connecting the cable ends 
  • Contact area of the grub screws used in accessories may be less
  • Oxide scale formation on aluminium conductors
  • Galvanic corrosion can be avoided by 
  • Loose connection due to dissimilar metals and tem- perature

Mounting accessories-NE code-Specification of wooden board and blocks for wiring

  • Specification of commercially available boards, round blocks for mounting electrical accessories 
  • Size of the board
  • System of wiring
  • Place of wiring
  • Place of wiring
  • Specification for blocks and boards
  • T W round blocks
  • T W boards

Mounting accessories through and of pilot holes-wood machine screw specifications

  • Determining the through hole size according the cable size and number of cables
  • Method of making pilot holes in wood using bradawl and gimlet
  • Select the correct size of drill or pilot holes
  • Drill holes to correct depth
  • Wood screws
  • Types of wood screws
  • Slotted round head wood screws
  • Slotted raised countersunk head wood screws
  • Designation of wood screws
  • Selection of the correct type, size and length of screws
  • In softwood
  • In hardwood
  • Precautions to be adopted while fixing wood screws
  • Advantages of screws over nails
  • Machine screws 
  • Screw heads
  • Types of Machine screws
  • Metric threaded screws
  • BA (British association) threaded screws
  • Unified National threaded screws (UNF)
  • Self-tapping screws

Diagrams and systems used in domestic installation

  • Layout diagram 
  • Installation plan 
  • Circuit diagram 
  • Wiring diagram 

B I S Regulations, recommendations and NE code pertaining to wiring installations

  • B I S regulation pertaining wiring installations
  • Fittings and accessories 
  • Sub-circuits-different types
  • Light and fan sub-circuits
  • Power sub-circuits
  • Lighting 
  • Socket outlets 
  • Fans
  • Flexible cords
  • Flexible cords shall not be used in following cases
  • Mounting levels of the accessories and cables as recommended in B I S and NEC

Method of marking the layout for wiring

  • Plumb-bob (Marking true vertical line)
  • Spirit level (Marking true horizontal line)
  • Water level
  • Marking of layout
  • Marking o true vertical runs
  • Marking ‘true’ horizontal runs
  • Measuring off horizontal and vertical runs
  • Marking cable runs on the ceiling 

PVC Channel (casing and capping) wiring

Introduction
Precautions
Fabricating a right-angled vertical bend
Fabricating 90 bend
Fabricating a tee junction
Installation of cables
Attachment of cover
Earth continuity conductor 

Earthing - Method, Regulations and Recommendations

  • System Earthing
  • Equipment Earthing
  • Terminology
  • Apparatus
  • Bonding
  • Damp situation
  • Dead
  • Earth
  • Earth-continuity conductor (ECC)
  • Earth current
  • Earth electrode
  • Earth fault
  • Earth (earthing) terminal
  • Earth wire
  • Earthed circuit
  • Earthed pole 
  • Earthed system 
  • Earthed lead 
  • Earthing ring (or earth bus)
  • Earthing resistor (earthing resistance) 
  • Fault
  • Fault current 
  • Double insulation
  • Functional insulation
  • Reinforced insulation (protective insulation)
  • Leakage
  • Leakage current
  • Live
  • Multiple-earthed neutral system
  • Potential (at a point)
  • Resistance area (of and earth electrode only)
  • Service line
  • Step potential
  • Touch potential 
  • Reasons for earthing 
  • Types of earth electrodes
  • Rod and pipe electrodes

I.E.E. Regulations pertaining to earthing

  • I.E. Rules pertaining to earthing
  • Provisions applicable to medium, high or extra high voltage installations
  • Systems at medium voltage
  • Connection with earth
  • Guarding 
  • Earthing

Domestic wiring-use of rawl jumper, plugs, wooden gutties and pipe jumpers on brick/concrete walls

  • Rawl jumper 
  • Types of filler materials 
  • Shape of the wooden guttie
  • Method of fixing 
  • Pipe jumper
  • Preparing the pipe jumper

Energy meters-symbol-internal connection-N.E. code of practice and I.E. rules of energy meter installation

  • Precautions while installing energy meters
  • Installation
  • General Instructions

Errors in energy meters

  • Incorrect magnitude of fluxes
  • Incorrect phase angles
  • Lack of symmetry in magnetic circuit
  • Errors caused by the braking system
  • Preliminary light load adjustment 
  • Full load unity power factor adjustment 
  • Lag adjustments (Low power factor adjustments)
  • Rated supply voltage
  • Full load unity power factor 
  • The performance 
  • Creep adjustment

Testing a domestic wiring installation

  • Inspection of the installation
  • Lighting circuits
  • Testing of installation
  • Continuity or open circuit test 
  • Polarity test
  • Insulation resistance between conductors and earth

Inspection and test of wiring installation-Method of improving the condition-Regulations

  • I.E. Regulations
 

Apply for Certification

https://www.vskills.in/certification/Vskills-Certified-House-wiring-Electrician