Electrical Installation Calculations Volume 2, Sixth Edition

Designed to provide a step by step guide to successful application of the electrical installation calculations required in day to day electrical engineering practice, the Electrical Installation Calculations series has proved an invaluable reference for over forty years, for both Foundation and Modern Apprentices, and professional electrical installation engineers alike. Now in its sixth edition, Volume 2 has been fully updated to meet the requirements of the 2330 Level 3 Certificate in Electrotechnical Technology from City & Guilds, and will also prove a vital purchase for students of Level 3 NVQs in Electrotechnical Services. Essential calculations, which may not necessarily feature as part of the requirements of these syllabi, are retained for reference by professional electrical installation engineers based in industry. The new edition also brings content in line with the latest edition of the Wiring Regulations BS 7671:2001 (incorporating Amendments 1:2002 & 2:2004), with material cross-referenced to the Wiring Regulations throughout. New learning features are now incorporated into the text. In particular, alongside the traditional long method of calculation, new calculator methods are presented to demonstrate this alternative, more simplified methodology, now often in use. Key terms are explained in a glossary section and worked examples and exercises are included throughout to maximise accessibility of the material for the reader. A complete answer section is included at the back of the book to enable readers to check their understanding of the calculations presented. Also available from Newnes: Electrical Installation Calculations Volume 1 , 7th edn, 0-7506-6782-6, by Watkins & Kitcher - the basic calculations required for electrical installation work, and Level 2 study / Foundation Modern Apprenticeships • The established series for carrying out correct electrical installation calculations - continuously in print for over 40 years • New edition matched to the requirements of the latest qualifications from City & Guilds - 2330 Level 3 Certificate in Electrotechnical Technology • Calculator methods provide an alternative, simplified methodology for completing electrical installation calculations Audience: Students on a wide range of electrical and construction courses (City & Guilds, NVQ, BTEC), Modern Apprentices, pratising electricians. Mathematics forms the essential foundation of electrical installation work. Without applying mathematical functions we would be unable to work out the size of a room which needs lighting or heating, the size and/or the number of the lights or heaters themselves, the number and/or the strength of the fixings required, or the size of the cables supplying them. We would be unable to accurately establish the rating of the fuse or circuit breaker needed to protect the circuits, or predict the necessary test results when testing the installation. Like it or not you will need to be able to carry out mathematics if you want to be an efficient and skilled electrician. This book will show you how to perform the math you will need to be a proficient electrician. It concentrates on the electronic calculator methods you would use in class and in the workplace. The book does not require you to have a deep understanding of how the mathematical calculations are performed; you are taken through each topic step by step, then you are given the opportunity yourself to carry out exercises at the end of each chapter. Throughout the book useful references are made to Amendment 2:2004 BS 7671 Requirements for Electrical Regulations and the IEE On-Site Guide. This second volume includes advanced calculations, in particular those involving cable selection. As well as being vii invaluable to students studying for the City and Guilds 2330, it will also be of considerable use to those involved in electrical installation work, particularly if studying for the City and Guilds 2391 Inspection and Testing, 2400 Design and Verification and the 2381 exams Contents......Page 7 Preface......Page 9 Use of calculators......Page 11 Simple transposition of formulae......Page 13 SI units......Page 15 Conductor colour identi . cation......Page 17 Alternating current circuit calculations......Page 18 a.c. waveform and phasor representation......Page 49 Parallel circuits involving resistance, inductance and capacitance......Page 64 Power factor improvement......Page 72 Three-phase circuit calculations......Page 79 Voltmeters and ammeters: changing the use and extending the range......Page 114 Alternating current motors......Page 120 Application of diversity factors......Page 127 Cable selection......Page 134 Lighting calculations......Page 159 Mechanics......Page 166 Miscellaneous examples......Page 175 Formulae......Page 183 Glossary......Page 188 A guide to successful application of the electrical installation calculations required in day-to-day electrical engineering practice. It meets the requirements of the 2330 Level 3 Certificate in Electrotechnical Technology from City & Guilds. It is suitable for those undertaking Level 3 NVQs in Electrotechnical Services. A guide to application of the electrical installation calculations required in day to day electrical engineering practice. It meets the requirements of the 2330 Level 2 Certificate in Electrotechnical Technology from City and Guilds. It is suitable for students of the Level 3 NVQs in Electrotechnical Services.