Electrical Installation Calculations : Advanced - For Technical Certificate and NVQ

by Kitcher; Christopher

• ISBN13: 9781856176644
• ISBN10: 1856176649
• Edition: 7th
• Format: Nonspecific Binding
• Copyright: 2009-05-06
• Publisher: Routledge

Summary

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 apprentices and professional electrical installation engineers alike. Now in its seventh edition, Volume 2 has been fully updated in line with the 17th Edition IEE Wiring Regulations (BS 7671:2008) and references the material covered to the Wiring Regs throughout. The content meets the requirements of the 2330 Level 3 Certificate in Electrotechnical Technology from City & Guilds and will also prove a vital purchase for those undertaking Level 3 NVQs in Electrotechnical Services. Essential calculations which may not necessarily feature as part of the requirements of the syllabus are retained for reference by professional electrical installation engineers based in industry, or for those students wishing to progress to higher levels of study. The book's structure and new design make finding the required calculation easy. Key terms are explained in a glossary section and worked examples and exercises are included throughout the text to maximise accessibility of the material for the reader. A complete question and answer section is included at the back of the book to enable readers to check their understanding of the calculations presented. Also available: Electrical Installation Calculations Volume 1, 8th edn, by Watkins & Kitcher- the basic calculations required for electrical installation work, and Level 2 study and apprenticeships. * The established series for carrying out correct electrical installation calculations - continuously in print for over 40 years * New edition fully up-to-date with 17th Edition IEE Wiring Regulations * Matched to the requirements of the City & Guilds Level 3 Certificate in Electrotechnical Technology (2330)

Table of Contents

Preface	p. vii
Use of calculators	p. 1
Simple transposition of formulae	p. 3
SI units	p. 5
Conductor colour identification	p. 8
Alternating current circuit calculations	p. 9
Impedance	p. 9
Inductive reactance	p. 13
Capacitive reactance	p. 16
Impedance in series circuits	p. 20
Impedance triangles and power triangles	p. 29
a.c. waveform and phasor representation	p. 43
Alternating e.m.f. and current	p. 43
Phasors	p. 48
Parallel circuits involving resistance, inductance and capacitance	p. 56
Power factor improvement	p. 64
Calculation without p.f. correction	p. 66
Calculation with p.f. correction	p. 66
Three-phase circuit calculations	p. 70
Star-connected motors	p. 70
Delta-connected motors (mesh)	p. 72
Resistance and inductance in three-phase circuits	p. 74
Three-phase circuits	p. 78
Three-phase power	p. 80
Voltage drop in three-phase circuits	p. 85
Voltmeters and ammeters: changing the use and extending the range	p. 103
Voltmeters	p. 103
Ammeters	p. 105
Alternating current motors	p. 109
Application of diversity factors	p. 116
Cable selection	p. 122
Earthing conductor calculation	p. 122
Voltage drop and cable selection calculations	p. 126
Earth leakage protection calculations	p. 140
Lighting calculations	p. 147
Units and quantities	p. 147
Inverse square law	p. 147
Cosine law	p. 149
Mechanics	p. 154
Moment of force	p. 154
Torque	p. 154
Power	p. 155
Surface speed, pulley diameter and speed ratios	p. 157
Miscellaneous examples	p. 162
d.c. generators	p. 162
d.c. motors	p. 163
Alternators and synchronous motors	p. 164
Induction motors	p. 165
Insulation resistance	p. 166
Formulae	p. 170
Glossary	p. 176
Answers to exercises	p. 180
General questions	p. 192
Additional questions	p. 200
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