This popular guide focuses on common misconceptions in the application of the IET Wiring Regulations. It explains in clear language those parts of the regulations that most need simplifying, outlining the correct procedures to follow and those to avoid. Emphasis has been placed on areas where confusion and misinterpretation are common, such as earthing and bonding, circuit design and protection, and in particular the increased use of RCDs.
With the coverage carefully matched to the syllabus of the City & Guilds Certificate in the Requirements for Electrical Installations (2382-12 and 2382-15) and containing sample exam questions and answers, this book is also an ideal revision guide.
Author(s): Brian Scaddan
Edition: 10
Publisher: Routledge
Year: 2015
Language: English
Pages: 159
CHAPTER 1 Fundamental Requirements for Safety
IET Wiring Regulations (IET Regulations Part 1 and Chapter 13)
The Health and Safety at Work Act 1974
The Electricity at Work Regulations 1989
The Building Regulations 2010 Part 'P'
CHAPTER 2 Earthing
Earth: What Is It, and Why and How Do We Connect to It?
Earth Electrode Resistance
Earthing in the IET Regulations (IET Regulations Chapter 4, Section 411)
Earthing Systems (IET Regulations Definitions (Systems))
Earth Fault Loop Impedance
Determining the Value of Total Loop Impedance
CHAPTER 3 Protection
What is Protection?
Protection Against Electric Shock (IET Regulations Chapter 41)
SELV or PELV
Protection Against Overcurrent (IET Regulations Chapter 43 and Definitions)
Protection Against Overvoltage (IET Regulations Section 443)
Protection Against Undervoltage (IET Regulations Section 445)
CHAPTER 4 Isolation Switching and Control
Isolation and Switching (IET Regulations Section 537)
CHAPTER 5 Circuit Design
Design Procedure
Design Current
Nominal Setting of Protection
Voltage Drop (IET Regulations 525 and Appendix 12)
Shock Risk (IET Regulations Section 411)
Thermal Constraints (IET Regulations Section 543)
Example of Use of the Adiabatic Equation
An Example of Circuit Design
Assessment of General Characteristics
Sizing the Main Tails
Sizing the Kiln Circuit Cable
CHAPTER 6 Inspection and Testing
Testing Sequence (Part 7)
CHAPTER 7 Special Locations IET Regulations Part 7
Introduction
BS 7671 Section 701: Bathrooms, etc.
BS 7671 Section 702: Swimming Pools
BS 7671 Section 703: Hot Air Saunas
BS 7671 Section 704: Construction Sites
BS 7671 Section 705: Agricultural and Horticultural Locations
BS 7671 Section 706: Conductive Locations with Restrictive Movement
BS 7671 Section 708: Caravan and Camping Parks
BS 7671 Section 709: Marinas
BS 7671 Section 710: Medical Locations
BS 7671 Section 711: Exhibitions, Shows and Stands
BS 7671 Section 712: Solar Photovoltaic (PV) Supply Systems
BS 7671 Section 714: Outdoor Lighting Installations
BS 7671 Section 715: Extra Low Voltage Lighting Installations
BS 7671 Section 717: Mobile or Transportable Units
BS 7671 Section 721: Caravans and Motor Caravans
BS 7671 Section 722: Electric Vehicle Charging Installations
BS 7671 Section 729: Operating and Maintenance Gangways
BS 7671 Section 740: Amusement Devices, Fairgrounds, Circuses, etc.
BS 7671 Section 753: Floor and Ceiling Heating Systems
APPENDIX A 17th Edition: Examination Question Allocation and Sample Paper
Typical City & Guilds Style Multiple Choice Question Paper
Sample Paper
APPENDIX B Answers to Multiple Choice Test
