IET Guidance Note 1: Selection & Erection, 10th Edition (2026)
The IET Guidance Note 1: Selection & Erection – 18th Edition Amendment 4 is a key technical reference for UK electricians, electrical installers, inspectors and testing engineers working to the latest BS 7671 standards.
Updated to BS 7671:2018+A4:2026, this latest edition provides practical guidance on selecting and installing electrical equipment safely and compliantly across domestic, commercial and industrial installations. It covers essential topics including identification labels, insulation monitoring devices (IMDs), RCD coordination, protected escape routes, concealed cable installation, functional earthing for ICT systems, stationary secondary batteries and Power over Ethernet systems.
Designed for professionals involved in electrical installation, inspection and verification, this IET guidance book helps simplify complex wiring regulations while supporting safer system design, compliant installations and improved testing procedures.
Why is Guidance Note 1 important for electrical installation work?
This guide helps electricians correctly apply selection and erection requirements in line with the latest IET Wiring Regulations. It is especially useful for installation planning, inspection, testing and ensuring compliance across modern electrical systems.
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1 x IET Guidance Note 1: Selection & Erection – 18th Edition Amendment 4, 10th Edition
Official IET publication
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