Cable for use in an electrical installation should be selected to comply with the electrical characteristics of current rating, voltage drop, etc., as required by Parts 4 and 5 of BS 7671 and the physical characteristics required by Chapter 52 Selection and Erection of Wiring Systems.
The correct selection and erection of a complete wiring system is necessary to provide compliance with Chapter 52.
Overspecification of cable performance requirements can result in increased installation costs and it is incumbent on the designer to assess all aspects of the overall performance required by the user.
This unit will discuss these concepts.
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Trevor Pickard is a self-employed electrical engineering consultant. After serving a student apprenticeship with a Distribution Network Operator (Midlands Electricity Board), Trevor held various engineering positions in the company and its subsequent privatised entities and gained experience in the construction, maintenance and operation of high and low voltage electricity distribution systems. This was followed with posts in Design, Safety, Production Engineering, as Production Manager of a large urban based operational division, as General Manager of the Repair and Restoration department, and as General Manager of the Primary Network department (33kV-132kV). Trevor is still actively involved in the writing of standards in the domestic, European and International arena with BSI, CENELEC and IEC. For many years he lectured for the IET on their various short courses and he has authored books in the City & Guilds Diploma in Electrical Installations series and more recently modules in the Electrical Distributors Association/IET Product Knowledge Programme.