IET 18th Edition Amendment 4 Complete Library (BS 7671:2018+A4:2026)

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The definitive Amendment 4 reference library for electrical professionals. Bringing together the complete family of BS 7671 publications, it goes beyond the core requirements to provide deeper guidance across selection and erection, isolation and switching, inspection and testing, protection against fire and electric shock, special locations, Building Regulations, and design. 

• A comprehensive resource for contractors, designers, qualified supervisors, consultants, inspectors, and businesses supporting larger or more complex projects. 
• Helps your team build consistent knowledge across the full range of BS 7671 guidance, rather than relying on a single reference book. 
• Useful for training, technical queries, specification work, and supporting confident decision-making across different installation types. 

Contains the following publications, fully updated for Amendment 4: 

• IET BS 7671 Wiring Regulations, 18th Edition 
• IET On-Site Guide 
• IET Guidance Notes 1-8 
• IET Electrician’s Guide to the Building Regulations 
• IET Design Guide