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• Introduction to BS 7671:2018Introduction to Amendment 1:2020Introduction to Amendment 2:2022Introduction to Amendment 3:2024Introduction to Amendment 4:2026Part 1: Scope, object and fundamental principles Chapter 11: ScopeChapter 12: Object and effectsChapter 13: Fundamental principles Part 2: Terms and definitions Symbols used in BS 7671Abbreviated terms used in BS 7671 Part 3: Assessment of general characteristics Chapter 30: Assessment of general characteristicsChapter 31: Purposes, supplies and structureChapter 32: Classification of external influencesChapter 33: CompatibilityChapter 34: MaintainabilityChapter 35: Safety servicesChapter 36: Continuity of service Part 4: Protection for safety Chapter 41: Protection against electric shockChapter 42: Protection against thermal effectsChapter 43: Protection against overcurrentChapter 44: Protection against voltage disturbances and electromagnetic disturbancesChapter 45: Not used Chapter 46: Isolation and switching Part 5: Selection and erection of equipment Chapter 51: Common rulesChapter 52: Selection and erection of wiring systemsChapter 53: Protection, isolation, switching, control and monitoringChapter 54: Earthing arrangements and protective conductorsChapter 55: Other equipmentChapter 56: Safety services Part 6: Inspection and testing Chapter 61: Not used Chapter 62: Not used Chapter 63: Not used Chapter 64: Initial verificationChapter 65: Periodic inspection and testing Part 7: Special installations or locations Section 700 GeneralSection 701: Locations containing a bath or showerSection 702: Swimming pools and other basinsSection 703: Rooms and cabins containing sauna heatersSection 704: Construction and demolition site installationsSection 705: Agricultural and horticultural premisesSection 706: Conducting locations with restricted movementSection 708: Electrical installations in caravan / camping parks and similar locationsSection 709: Marinas and similar locationsSection 710: Medical locationsSection 711: Exhibitions, shows and standsSection 712: Solar photovoltaic (pv) power supply systemsSection 714: Outdoor lighting installationsSection 715: Extra-low voltage lighting installationsSection 716: Power over ethernetSection 717: Mobile or transportable unitsSection 721: Electrical installations in caravans and motor caravansSection 722: Electric vehicle charging installationsSection 729: Operating and maintenance gangwaysSection 730: Onshore units of electrical shore connections for inland navigation vesselsSection 740: Temporary electrical installations for structures, amusement devices and booths at fairgrounds, amusement parks and circusesSection 753: Heating cables and embedded heating systems Part 8: Functional requirements Chapter 81: Low voltage electrical installations: functional aspects - energy efficiencyChapter 82: Prosumer's low voltage electrical installations Appendices Appendix 1 (Normative): British standards and other standards or documents to which reference is made in BS 7671Appendix 2 (Informative): Statutory regulations and associated memorandaAppendix 3 (Informative): Time/current characteristics of overcurrent protective devicesAppendix 4 (Informative): Current-carrying capacity and voltage drop for cablesAppendix 5 (Informative): Classification of external influencesAppendix 6 (Informative): Model forms for certification and reportingAppendix 7: Deleted by BS 7671:2018+A2:2022 Appendix 8 (Informative): Current-carrying capacity and voltage drop for busbar trunking and powertrack systemsAppendix 9 (Informative): IT, multiple source, DC and other systemsAppendix 10 (Informative): Protection of conductors in parallel against overcurrentAppendix 11 (Informative): Warning and user instruction labelsAppendix 12: Not used Appendix 13 (Informative): Escape routes and fire protectionAppendix 14 (Informative): Determination of prospective fault currentAppendix 15 (Informative): Ring and radial final circuit arrangements, Regulation 433.1Appendix 16 (Informative): Devices for protection against overvoltageAppendix 17: Deleted by BS 7671:2018+A4:2026 Table of figuresTable of tablesIndex

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• Introduction to BS 7671:2018Introduction to Amendment 1:2020Introduction to Amendment 2:2022Introduction to Amendment 3:2024Introduction to Amendment 4:2026Part 1: Scope, object and fundamental principles Chapter 11: ScopeChapter 12: Object and effectsChapter 13: Fundamental principles Part 2: Terms and definitions Symbols used in BS 7671Abbreviated terms used in BS 7671 Part 3: Assessment of general characteristics Chapter 30: Assessment of general characteristicsChapter 31: Purposes, supplies and structureChapter 32: Classification of external influencesChapter 33: CompatibilityChapter 34: MaintainabilityChapter 35: Safety servicesChapter 36: Continuity of service Part 4: Protection for safety Chapter 41: Protection against electric shockChapter 42: Protection against thermal effectsChapter 43: Protection against overcurrentChapter 44: Protection against voltage disturbances and electromagnetic disturbancesChapter 45: Not used Chapter 46: Isolation and switching Part 5: Selection and erection of equipment Chapter 51: Common rulesChapter 52: Selection and erection of wiring systemsChapter 53: Protection, isolation, switching, control and monitoringChapter 54: Earthing arrangements and protective conductorsChapter 55: Other equipmentChapter 56: Safety services Part 6: Inspection and testing Chapter 61: Not used Chapter 62: Not used Chapter 63: Not used Chapter 64: Initial verificationChapter 65: Periodic inspection and testing Part 7: Special installations or locations Section 700 GeneralSection 701: Locations containing a bath or showerSection 702: Swimming pools and other basinsSection 703: Rooms and cabins containing sauna heatersSection 704: Construction and demolition site installationsSection 705: Agricultural and horticultural premisesSection 706: Conducting locations with restricted movementSection 708: Electrical installations in caravan / camping parks and similar locationsSection 709: Marinas and similar locationsSection 710: Medical locationsSection 711: Exhibitions, shows and standsSection 712: Solar photovoltaic (pv) power supply systemsSection 714: Outdoor lighting installationsSection 715: Extra-low voltage lighting installationsSection 716: Power over ethernetSection 717: Mobile or transportable unitsSection 721: Electrical installations in caravans and motor caravansSection 722: Electric vehicle charging installationsSection 729: Operating and maintenance gangwaysSection 730: Onshore units of electrical shore connections for inland navigation vesselsSection 740: Temporary electrical installations for structures, amusement devices and booths at fairgrounds, amusement parks and circusesSection 753: Heating cables and embedded heating systems Part 8: Functional requirements Chapter 81: Low voltage electrical installations: functional aspects - energy efficiencyChapter 82: Prosumer's low voltage electrical installations Appendices Appendix 1 (Normative): British standards and other standards or documents to which reference is made in BS 7671Appendix 2 (Informative): Statutory regulations and associated memorandaAppendix 3 (Informative): Time/current characteristics of overcurrent protective devicesAppendix 4 (Informative): Current-carrying capacity and voltage drop for cablesAppendix 5 (Informative): Classification of external influencesAppendix 6 (Informative): Model forms for certification and reportingAppendix 7: Deleted by BS 7671:2018+A2:2022 Appendix 8 (Informative): Current-carrying capacity and voltage drop for busbar trunking and powertrack systemsAppendix 9 (Informative): IT, multiple source, DC and other systemsAppendix 10 (Informative): Protection of conductors in parallel against overcurrentAppendix 11 (Informative): Warning and user instruction labelsAppendix 12: Not used Appendix 13 (Informative): Escape routes and fire protectionAppendix 14 (Informative): Determination of prospective fault currentAppendix 15 (Informative): Ring and radial final circuit arrangements, Regulation 433.1Appendix 16 (Informative): Devices for protection against overvoltageAppendix 17: Deleted by BS 7671:2018+A4:2026 Table of figuresTable of tablesIndex

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• Introduction to BS 7671:2018Introduction to Amendment 1:2020Introduction to Amendment 2:2022Introduction to Amendment 3:2024Introduction to Amendment 4:2026Part 1: Scope, object and fundamental principles Chapter 11: ScopeChapter 12: Object and effectsChapter 13: Fundamental principles Part 2: Terms and definitions Symbols used in BS 7671Abbreviated terms used in BS 7671 Part 3: Assessment of general characteristics Chapter 30: Assessment of general characteristicsChapter 31: Purposes, supplies and structureChapter 32: Classification of external influencesChapter 33: CompatibilityChapter 34: MaintainabilityChapter 35: Safety servicesChapter 36: Continuity of service Part 4: Protection for safety Chapter 41: Protection against electric shockChapter 42: Protection against thermal effectsChapter 43: Protection against overcurrentChapter 44: Protection against voltage disturbances and electromagnetic disturbancesChapter 45: Not used Chapter 46: Isolation and switching Part 5: Selection and erection of equipment Chapter 51: Common rulesChapter 52: Selection and erection of wiring systemsChapter 53: Protection, isolation, switching, control and monitoringChapter 54: Earthing arrangements and protective conductorsChapter 55: Other equipmentChapter 56: Safety services Part 6: Inspection and testing Chapter 61: Not used Chapter 62: Not used Chapter 63: Not used Chapter 64: Initial verificationChapter 65: Periodic inspection and testing Part 7: Special installations or locations Section 700 GeneralSection 701: Locations containing a bath or showerSection 702: Swimming pools and other basinsSection 703: Rooms and cabins containing sauna heatersSection 704: Construction and demolition site installationsSection 705: Agricultural and horticultural premisesSection 706: Conducting locations with restricted movementSection 708: Electrical installations in caravan / camping parks and similar locationsSection 709: Marinas and similar locationsSection 710: Medical locationsSection 711: Exhibitions, shows and standsSection 712: Solar photovoltaic (pv) power supply systemsSection 714: Outdoor lighting installationsSection 715: Extra-low voltage lighting installationsSection 716: Power over ethernetSection 717: Mobile or transportable unitsSection 721: Electrical installations in caravans and motor caravansSection 722: Electric vehicle charging installationsSection 729: Operating and maintenance gangwaysSection 730: Onshore units of electrical shore connections for inland navigation vesselsSection 740: Temporary electrical installations for structures, amusement devices and booths at fairgrounds, amusement parks and circusesSection 753: Heating cables and embedded heating systems Part 8: Functional requirements Chapter 81: Low voltage electrical installations: functional aspects - energy efficiencyChapter 82: Prosumer's low voltage electrical installations Appendices Appendix 1 (Normative): British standards and other standards or documents to which reference is made in BS 7671Appendix 2 (Informative): Statutory regulations and associated memorandaAppendix 3 (Informative): Time/current characteristics of overcurrent protective devicesAppendix 4 (Informative): Current-carrying capacity and voltage drop for cablesAppendix 5 (Informative): Classification of external influencesAppendix 6 (Informative): Model forms for certification and reportingAppendix 7: Deleted by BS 7671:2018+A2:2022 Appendix 8 (Informative): Current-carrying capacity and voltage drop for busbar trunking and powertrack systemsAppendix 9 (Informative): IT, multiple source, DC and other systemsAppendix 10 (Informative): Protection of conductors in parallel against overcurrentAppendix 11 (Informative): Warning and user instruction labelsAppendix 12: Not used Appendix 13 (Informative): Escape routes and fire protectionAppendix 14 (Informative): Determination of prospective fault currentAppendix 15 (Informative): Ring and radial final circuit arrangements, Regulation 433.1Appendix 16 (Informative): Devices for protection against overvoltageAppendix 17: Deleted by BS 7671:2018+A4:2026 Table of figuresTable of tablesIndex