IET Guidance Note 5: Protection Against Electric Shock, 10th Edition (2026)
The IET Guidance Note 5: Protection Against Electric Shock – 18th Edition Amendment 4 is an essential technical guide for UK electricians, electrical inspectors, contractors and installation engineers working to BS 7671 standards.
Updated to BS 7671:2018+A4:2026, this latest edition provides practical guidance on applying electric shock protection requirements across domestic, commercial and industrial electrical installations. It covers key topics including earth fault loop impedance (EFLI), verification of site-applied insulation and Power over Ethernet installations to support safe and compliant electrical work.
Designed for professionals carrying out electrical installation, inspection and testing, this IET guidance book helps improve safety standards, support regulatory compliance and assist with the correct application of protective measures in modern electrical systems.
Why is Guidance Note 5 important for electricians?
This guide helps electricians understand and apply protection against electric shock in line with the latest IET Wiring Regulations. It is particularly useful during inspection, testing, fault protection verification and installation design work.
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1 x IET Guidance Note 5: Protection Against Electric Shock – 18th Edition Amendment 4, 10th Edition
Official IET publication
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