IET Wiring Regulations 18th Edition (BS 7671:2018+A4:2026)

Name: IET Wiring Regulations 18th Edition (BS 7671:2018+A4:2026)
SKU: IETWIRINGREGSA4
Price: 104.7 GBP
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SKU: IETWIRINGREGSA4

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Key Features

One consolidated BS 7671 update including A4:2026
Modern guidance for battery storage, ICT and PoE
Updated medical locations and clearer bonding test records

Related Categories

Books and Publications

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Key Features

One consolidated BS 7671 update including A4:2026
Modern guidance for battery storage, ICT and PoE
Updated medical locations and clearer bonding test records

Related Categories

Books and Publications

IET Wiring Regulations 18th Edition (BS 7671:2018+A4:2026)

IET Wiring Regulation 18th Edition (BS 761:2018+A4:2026) is the UK’s recognised standard for safe electrical installations across domestic, commercial and industrial environments. Used by electricians, designers, specifiers, inspectors and facilities teams, BS 7671 supports consistent compliance for design, installation, inspection, certification and maintenance of low-voltage electrical systems.

BS 7671:2018+A4:2026 is a consolidated publication, bringing together BS7671:2018 and all prior amendments into one up-to-date reference. Amendment 4:2026 is a major update to the Eighteenth Edition, helping ensure the standard reflects modern installation methods, technologies and verification requirements.

Key technical updates in Amendment 4 include new requirements for stationary secondary batteries used for electrical energy storage within installations, functional earthing and functional equipotential bonding for ICT equipment and systems, and a dedicated section covering Power over Ethernet (PoE) distribution. It also introduces a major revision of Section 710 Medical Locations, plus a schedule of test results for recording resistance of supplementary protective equipotential bonding conductors, supporting clearer verification and documentation.

Key Features

UK-recognised standard for electrical installations in domestic, commercial and industrial environments
BS 7671:2018+A4:2026 consolidated edition incorporating all previous amendments into one reference
New chapter covering stationary secondary batteries for electrical storage and supply within installations
New requirements for functional earthing and functional equipotential bonding for ICT equipment and systems
New section on Power over Ethernet (PoE) and ELV DC power distribution over balanced IT cabling
Major revision of Section 710 Medical Locations
Includes a schedule of test results for recording resistance of supplementary protective equipotential bonding conductors
Amendment 4 scheduled for publication 15 April 2026, with the previous version withdrawn six months later

Yes

Description

IET Wiring Regulations 18th Edition (BS 7671:2018+A4:2026)

Key Features

UK-recognised standard for electrical installations in domestic, commercial and industrial environments
BS 7671:2018+A4:2026 consolidated edition incorporating all previous amendments into one reference
New chapter covering stationary secondary batteries for electrical storage and supply within installations
New requirements for functional earthing and functional equipotential bonding for ICT equipment and systems
New section on Power over Ethernet (PoE) and ELV DC power distribution over balanced IT cabling
Major revision of Section 710 Medical Locations
Includes a schedule of test results for recording resistance of supplementary protective equipotential bonding conductors
Amendment 4 scheduled for publication 15 April 2026, with the previous version withdrawn six months later