Guidance Note 5: Protection Against Electric Shock provides a core element of safety for specifiers, designers, contractors and inspectors. It includes clear guidance on how to apply the safety requirements of BS 7671 concerning electric shock and has been fully updated to BS 7671:2018+A4:2026, including Power over Ethernet; maximum permissible measured earth fault loop impedance (EFLI), guidance on the verification of site applied insulation.
Cooperating organizationsAcknowledgementsPrefaceIntroductionChapter 1: Statutory Regulations and The Wiring RegulationsChapter 2: Electric shock and protective measuresChapter 3: Provisions for basic protectionChapter 4: Automatic disconnection of supply (ADS)Chapter 5: Double or reinforced insulationChapter 6: Electrical separationChapter 7: Extra-low voltage provided by SELV or PELVChapter 8: Additional protectionChapter 9: Obstacles and placing out of reachChapter 10: Protective measures for application only where the installation is controlled or under the supervision of skilled or instructed personsChapter 11: EarthingChapter 12: Circuit protective conductors (CPCs)Chapter 13: Protective equipotential bondingChapter 14: Protective multiple earthingChapter 15: Special installations or locationsChapter 16: Cables installed in walls, floors, ceilings and partitionsAppendix A: Maximum permissible measured earth fault loop impedanceAppendix B: Resistance of copper and aluminium conductorsIndex