Electrolesk A Guide to Practical Electrical Installation Work.

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Practical Wiring



These articles hope to explain the most common areas of Electrical Wiring usually encountered in an Electrical Installation. Detailed step by step wiring methods will be helpful to DIY projects. Installation work described here is according to British Standards [ IEE Regulations and Practice ]. Though the Electrical Codes, Regulations, Type of accessories ,Cable types and installation methods may differ from region to region, the reader will be able to understand the basics of doing a similar installation.


Material Requirement

For Lighting,Ceiling Fan and 5A Socket outlets [ Receptacles ]Industrial applications, 1.5 mm2 [called as 1.5 mm squared] Cross sectioned double insulated Cu [Copper] Cables [Cu/PVC/PVC] are used for the Phase [Live or Hot] and the Neutral cables.

For Lighting,Ceiling Fan and 5A Socket outlets [ Receptacles ] Residential applications, 1.0 mm2 Cross sectioned double insulated Cu [Copper] Cables [Cu/PVC/PVC] are commonly used for the Phase [Live or Hot] and the Neutral cables.

For 15A Socket outlets and 13A Ring or Radial Socket outlets [ Receptacles ], 2.5 mm2 [called as 2.5 mm squared] Cross sectioned double insulated Cu [Copper] Cables [Cu/PVC/PVC] are used for the Phase [Live or Hot] and the Neutral cables.

Earth [Ground ]cable should be 2.5mm2 single insulated Cu[Copper] Cables [Cu/PVC] for both Industrial or Residential type of applications.

For Industrial Socket Outlets, Cable Sizes of 2.5 mm2 for 16A ,6.0 mm2 for 32A, 16mm2 for 63A double insulated Cu [Copper] Cables [Cu/PVC/PVC] are used for the Phase [Live ] ,the Neutral and Earth [Cu/PVC ,Single Insulated] cables of Industrial Socket Outlet Wirings of above Ampere rated Single Phase and 3 Phase designs.

Cable lengths for the above circuits will be such that voltage drop along the cables will be with in the approved limits of 10% of Supply Voltage.




Accessory Requirement

PVC Boxes to install the Light Switches/Socket outlets [5A,13A,15A ]

One Way Light Switches, Two Way Light Switches, Socket outlets [5A,13A,15A ] , Industrial Socket Outlets [16A,32A,63A, 3 Pin,4 Pin, 5 Pin Types ]

PVC Ceiling Rose [3 terminal type]

Lamp Holders, 4 Feet 36Watt Fluorescent Lamp, 40W Magnetic Ballast , Starter and base , Fluorescent Lamp Holders , PF correction Capacitor-2.5 micro Farad -01 nos

MCB 6A ,10A,16A,32A,63A [1 Pole]

MCB 16A ,32A, 63A [3 Pole and 4 Pole]



Install the switch boxes for Light Switches and Socket outlets at the required positions. Install the Ceiling roses where the Lights should be. Lay PVC conduits from the Distribution Board to the Switch positions, to the Ceiling Roses and to Socket outlets. The conduits can be embedded into the wall structure and or lay outside, clipped to the wall or structure. Instead of PVC conduits and switch boxes, GI conduits and switch boxes are being used for Industrial type of installations where you need protection for cables from physical damage.All metal conduits and boxes must be earthed by connecting to Earth [Ground] wire. In some wooden structured buildings, the cables are installed inside panels without conduits being used.The Cables should be colour coded correctly for Phase[Live or Hot],Neutral and Earth. Distribution Boards are normally embedded into walls in residences.


Method of Wiring -

Each electrical installation will have its own environment [ the premises or the building or the area ] and each will be slightly or entirely different to any other electrical installation of a similar type. This will be due to different Codes and practices enforced in different parts of the world, due to different type of accessories and also due to various installation designs.

Descriptions given on methods of wiring will be general explanations that will have to be modified according to the requirements on Codes and conditions. Going through the descriptions of each installation will make you aware whether it is the practice of your country or else to modify the basic wiring system to suit that particular Electrical regulations.


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