Residential Electrical Wiring System Paper


To provide the knowledge and design skills to develop a residential electrical wiring system as per regulation standards.

Summary of the task

Electrical house wiring regulations are necessary to decide the conductor size of cable for 220-240 V electrical supply under different weather conditions. First, it is necessary to understand the significance of power-flow study to fix the voltage-limits from the source to the load point. Then based on 17th wiring regulations/16th IEE wiring regulations/ National wiring regulations, design the ampere carrying capacity of wires used in a house. Further, recommend the safe and cost-effective earthing technique to avoid from electric shock.

Furthermore, the report should contain as per the marking scheme given in the attachment name “Appendix and Scheme”. The length of the main body text of the technical report should be between 1500 and 2000 words.

Understand the following points to complete the given Electrical Wiring- Design task for the house:

1.Conduct a power-flow study distribution radial network having 04/05 nodes to understand voltage variation from source to load by assuming load data and line data.

2.Collect the electrical load capacity for all appliances of a sample residential house.

3.Calculate the conductor design current (Ib), nominal current (In), perspective current (Iz), short circuit current (Isc) and % voltage drop for 1-phase, AC supply voltage with following parameters:

•Standard insulated conductors for group of 2/3/4/5/6 and clip to a surface.

•Cable operating under 03 different ambient temperature conditions.

•Refer the Appendix (Page-2) to tabulate the results obtained.

4.Sketch and compare the different type of earthing systems used in Oman/Any other opted country for studies and recommend cost effective suitable earthing system.

5.Calculate the earth fault loop impedance for home selected and justify its need.

Indicative References:

Hadi Saadat, 2009. Power System Analysis, McGraw-Hill, ISBN 16th 0-07-012235-0.

International Wire Sales, 2017. [Assessed: 27th Jan 2019].

Teng, J.H., 2000. A Network-Topology-based Three-Phase Load Flow for Distribution Systems. Proc. Natl. Sci. Counc. ROC (A), Vol. 24, No. 4, pp. 259-264. [Online], Available from:… [Accessed: 27th Jan 2019].

Pabla A. S, 2004. Electrical Power Distribution, Mc-Graw-Hill, ISBN 10: 0071447830.

IET Wiring Regulations 17th Edition, 2008.BS7671 [Online]. Available from:… [Accessed: 27th Jan 2019].

Pugha, Archie D, 2012. Electrical Transmission & Substation Structures: Solutions to Building the Grid of Tomorrow. Available from: [Accessed: 27th Jan 2019].

*** I’ve uploaded an attachment named “Appendix and Scheme”.

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