Table of Contents
Guide to the Wiring Regulations
Foreword by Giuliano Digilio
Preface
Acknowledgements
Chapter A – BS 7671: 2008 – Introduction and Overview
A 1 Introduction to BS 7671: 2008
A 2 Plan and layout of BS 7671: 2008
A 3 Overview of major changes
Chapter B – Legal Relationship and General Requirements of BS 7671: 2008
B 1 Legal requirements and relationship
B 1.1 Key UK legislation
B 1.2 The Electricity at Work Regulations 1989 (EWR 1989)
B 1.3 The Electricity Safety, Quality and Continuity Regulations 2002 (as amended)
B 1.4 The Electricity Act 1984 (as amended)
B 1.5 The Building Act 1984, The Building Regulations and Part P
B 1.6 The Electromagnetic Compatibility Regulations 2005 (EMC)
B 1.7 Tort and negligence
B 2 The role of Standards
B 3 Part 3 of BS 7671: 2008 – assessment of general characteristics
Chapter C – Circuitry and Related Parts of BS 7671: 2008
C 1 Introduction
C 2 Design procedure overview
C 3 Load assessment
C 3.1 Principles and definitions
C 3.2 Maximum demand assessment
C 3.3 Diversity
C 4 Circuit design
C 4.1 Introduction
C 4.2 Protection against overcurrent in general
C 4.3 Overload protection
C 4.4 Fault protection
C 4.5 Voltage drop
C 4.6 Disconnection and electric shock
C 5 Submains
C 5.1 Diversity
C 5.2 Distribution circuit (submain) selection
C 5.3 Armouring as a cpc
C 5.4 Automatic disconnection for submains
C 6 Discrimination co-ordination
C 6.1 Principles and system co-ordination
C 6.2 Fuse-to-fuse discrimination
C 6.3 Circuit breaker to circuit breaker discrimination
C 6.4 Circuit breaker to fuse discrimination
C 7 Parallel cables
C 7.1 General and 7671 requirements
C 7.2 Unequal current sharing
C 8 Harmonics
C 8.1 Requirements
C 8.2 Harmonic assessment
C 9 Standard final circuit designs
C 9.1 Introduction and scope
C 9.2 Standard domestic circuits
C 9.3 All-purpose standard final circuits
C 10 RCDs and circuitry
C 10.1 Introduction, increased use of RCDs
C 10.2 Consumer unit arrangements for RCDs
C 11 Ring and radial final circuits
C 11.1 Introduction
C 11.2 Ring final circuits
C 11.3 Radial final circuits
Chapter D – Selection and Erection – Equipment
D 1 Introduction and fundamentals
D 2 Compliance with Standards
D 3 Identification of conductors
D 3.1 Principle of required identification (514.3.1)
D 3.2 Identification by colour
D 3.3 Identification by marking
D 3.4 Additions and alterations – identification
D 3.5 Interface marking
D 3.6 d.c. identification
D 4 EMC and prevention of mutual detrimental influences
D 4.1 Introduction
D 4.2 EMC directive and BS 7671
D 4.3 EMC cable separation – power, IT, data and control cables
D 4.4 Cable management and EMC
D 5 Wiring systems
D 5.1 The choice of wiring systems
D 5.2 Circulating currents and eddy currents in single-core installations
D 5.3 Electrical connections and joints
D 5.4 Wiring systems – minimizing spread of fire
D 5.5 Proximity to other services
D 6 Circuit breakers
D 6.1 General
D 6.2 Operation and characteristics
D 6.3 Ambient temperature de-rating
D 7 Residual current devices
D 7.1 BS 7671 applications
D 7.2 Operation and BS 7671 requirements
D 7.3 Unwanted RCD tripping and discrimination
D 7.4 d.c. issues for RCDs
D 7.5 TT installations and RCDs
D 8 Other equipment
D 8.1 Isolation and switching
D 8.2 Consumer units for domestic installations
D 8.3 Overvoltage, undervoltage and electromagnetic disturbances
D 8.4 Surge protective devices
D 8.5 Insulation monitoring devices (IMDs)
D 8.6 Residual current monitors (RCMs)
D 9 Generating sets
D 10 Rotating machines
D 11 Plugs and socket outlets
D 12 Electrode water heaters and electrode boilers
D 13 Heating conductors
D 14 Lighting and luminaires
D 15 Safety services
D 15.1 Introduction
D 15.2 Classification of break times
D 15.3 Safety sources
D 15.4 Circuits for safety services
D 16 Ingress protection (IP), external influences
D 16.1 General
D 16.2 Equipment applications and examples
Chapter E – Earthing and Bonding
E 1 Introduction
E 2 Earthing arrangements
E 3 General requirements of earthing and bonding
E 4 Protective conductors
E 4.1 General
E 4.2 Physical types of protective conductor
E 4.3 Sizing protective conductors
E 4.4 Protective conductors up to 16 mm2
E 4.5 Earthing conductor
E 5 Armoured cables as protective conductors
E 5.1 General
E 5.2 ERA report on current sharing between armouring and cpc
E 5.3 ECA advice and recommendations
E 6 Protective equipotential bonding
E 6.1 Purpose of protective equipotential bonding
E 6.2 BS 7671 requirements
E 6.3 Bonding solutions for the modern installation
E 6.4 Sizing protective bonding conductors
E 6.5 Domestic protective equipotential bonding layouts
E 6.6 Supplementary equipotential bonding
E 7 High earth leakage installations
Chapter F – Inspection, Testing and Certification (Part 6)
F 1 Introduction
F 1.1 Inspection and testing – an integrated procedure
F 2 Visual inspection
F 3 Testing
F 3.1 Introduction – pass and fail nature
F 3.2 Required tests
F 3.3 Continuity testing
F 3.4 Ring continuity
F 3.5 Insulation testing
F 3.6 Polarity testing
F 3.7 Earth fault loop impedance (ELI) testing
F 3.8 Prospective fault current testing
F 3.9 Testing RCDs and other functional tests
F 3.10 Verification of voltage drop
F 4 Certification paperwork
F 4.1 Introduction, various certificates and schedules
F 4.2 Overview of certificates and schedules
F 4.3 Completing the paperwork
Chapter G – Special Locations
G 1 Introduction: Purpose and principles
G 1.1 Introduction
G 1.2 Purpose and principles
G 1.3 Particular requirements and numbering
G 2 Locations containing a bath or shower (701)
G 2.1 Introduction and risks
G 2.2 Zone concept
G 2.3 Electric shock requirements
G 2.4 Equipment selection and erection
G 3 Swimming pools and other basins (702)
G 3.1 Introduction and risks
G 3.2 Zone concept
G 3.3 Requirements and guidance
G 4 Agricultural and horticultural premises (705)
G 4.1 Introduction, purpose and principles
G 4.2 Requirements and guidance
G 5 Caravan parks and camping parks (708)
G 5.1 Introduction, purpose and principles
G 5.2 Requirements and guidance
G 6 Exhibitions, shows and stands (711)
G 6.1 Introduction and risks
G 6.2 Requirements and guidance
G 7 Solar photovoltaic (PV) power supply systems (712)
G 7.1 Introduction, principles and terminology
G 7.2 Requirements
G 7.3 Notes and guidance
G 8 Mobile or transportable units (717)
G 8.1 Scope and application
G 8.2 Requirements
G 8.3 Notes and guidance
G 9 Floor and ceiling heating systems (753)
G 9.1 Introduction
G 9.2 Requirements
G 9.3 Notes and guidance
Appendices
Appendix 1 – Standards and bibliography
Appendix 2 – Popular cables: current rating tables from BS 7671: 2008 Appendix 4
Appendix 3 – Limiting earth fault loop impedance tables from BS 7671: 2008
Appendix 4 – Cable data-resistance, impedance and ‘R1 + R2’ values
Appendix 5 – Fuse I2t characteristics
Index
