NAPIT EICR Codebreakers Updated for BS 7671:2018+A4:2026 (18th Edition Amendment 4)
 
The industry-leading NAPIT EICR Codebreakers book is now fully updated to align with BS 7671:2018+A4:2026 – 18th Edition Amendment 4 of the IET Wiring Regulations.
 
This purpose-written publication provides authoritative guidance for electrical contractors, inspectors and clients on correctly coding observations during Electrical Installation Condition Reports (EICR).
 
If you carry out EICR inspections, this essential guide ensures your observation coding remains compliant, consistent and defensible under the latest Wiring Regulations.
Fully Updated for Amendment 4 (2026)
This latest edition includes:
Existing EICR observation codes updated to BS 7671:2018+A4:2026
All previous amendments fully incorporated
Expanded technical guidance for contractors and inspectors
Clear support for clients and duty holders
Enhanced guidance to reduce coding errors and compliance risks
 
New Inclusions Under BS 7671:2018+A4:2026
The guide reflects key regulatory updates, including:
Requirements for stationary secondary batteries used for electrical energy storage and supply
Guidance on functional earthing and functional equipotential bonding for ICT equipment and systems
Inclusion of a schedule of test results for recording resistance of supplementary protective equipotential bonding conductors
 
Why Choose NAPIT EICR Codebreakers?
Ensures accurate C1, C2, C3 and FI coding decisions
Supports compliance with the latest 18th Edition Wiring Regulations
Reduces risk of incorrect classification during EICR inspections
Trusted reference across the UK electrical industry
 
Whether you are carrying out domestic, commercial or industrial inspections, this updated edition is an essential technical reference for maintaining compliance with the latest BS 7671 Amendment 4 (2026)