Acknowledgements ix – Chapter C&G unit /: Health and safety in building – services engineering – Chapter C&G unit : Understand the fundamental – principles and requirements of environmental – technology systems – Chapter C&G unit : Principles of electrical science – Chapter C&G unit : Electrical installations: Fault diagnosis – and rectifi cation – Chapter C&G unit : Electrical installations: Inspection, – testing and commissioning – Chapter C&G unit : Electrical systems design – Answers to Check your understanding questions – Preparing for assessment – Appendix A: Environmental organizations – Appendix B: Health and Safety Executive (HSE) – publications and information – Appendix C: IET Amendment – – a summary of changes – Glossary of terms .