{"id":879,"date":"2026-06-25T20:07:47","date_gmt":"2026-06-25T20:07:47","guid":{"rendered":"https:\/\/the-regs.co.uk\/blog\/?p=879"},"modified":"2026-06-25T20:12:09","modified_gmt":"2026-06-25T20:12:09","slug":"bs-7671-amendment-4-2026-everything-electricians-need-to-know","status":"publish","type":"post","link":"https:\/\/the-regs.co.uk\/blog\/?p=879","title":{"rendered":"BS 7671 Amendment 4 (2026) \u2013 Everything Electricians Need to Know"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Everything Electricians Need to Know<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Published: June 2026<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The publication of <strong>BS 7671:2018+A4:2026<\/strong>, commonly known as <strong>Amendment 4 of the 18th Edition Wiring Regulations<\/strong>, represents the latest evolution of the UK\u2019s national standard for electrical installations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As electrical technology continues to develop at a rapid pace, the Wiring Regulations must also evolve to ensure that installations remain safe, compliant and suitable for modern electrical systems. Amendment 4 introduces several important changes that reflect today\u2019s growing use of battery storage, digital infrastructure and smart building technologies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you\u2019re an electrician, electrical contractor, inspector, designer or someone preparing for the City &amp; Guilds 2382 examination, understanding Amendment 4 will soon become essential.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><a>Why Has Amendment 4 Been Introduced?<\/a><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">BS 7671 is regularly updated to reflect advances in technology, improvements in safety and changes to both British and international standards.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical installations today are very different from those designed only a few years ago. Renewable energy systems, battery storage, electric vehicles, smart buildings and digital communication networks are now commonplace.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Amendment 4 has been developed to ensure the Wiring Regulations continue to provide appropriate guidance for these emerging technologies while maintaining the highest standards of electrical safety.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><a>The Biggest Changes in Amendment 4<\/a><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Although there are numerous amendments throughout the Regulations, several stand out as particularly significant.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a>New Chapter for Stationary Secondary Batteries<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Battery Energy Storage Systems (BESS) are becoming increasingly common in both domestic and commercial installations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Until now, guidance has been spread across several sections and manufacturer recommendations. Amendment 4 introduces a dedicated chapter covering the installation, protection, isolation, ventilation and verification of stationary battery storage systems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is particularly important for electricians installing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Solar PV battery storage<\/li>\n\n\n\n<li>Stand-alone home batteries<\/li>\n\n\n\n<li>Commercial energy storage systems<\/li>\n\n\n\n<li>Backup power installations<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><a>New Requirements for Power over Ethernet (PoE)<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Power over Ethernet has grown rapidly in recent years.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Modern buildings increasingly power devices such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LED lighting<\/li>\n\n\n\n<li>CCTV systems<\/li>\n\n\n\n<li>Wireless access points<\/li>\n\n\n\n<li>Access control<\/li>\n\n\n\n<li>Building management systems<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">through Ethernet cabling.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Amendment 4 introduces dedicated requirements for PoE installations, helping ensure cable sizing, thermal effects and installation methods remain safe as power levels continue to increase.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><a>Functional Earthing for ICT Systems<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">As commercial buildings become increasingly reliant upon information technology, communication networks and data systems, Amendment 4 introduces a completely new section dealing with functional earthing and functional equipotential bonding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike protective earthing, functional earthing is intended to ensure reliable operation of sensitive electronic equipment by reducing electromagnetic interference and improving system performance.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><a>Major Changes to Medical Locations<\/a><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Electrical installations within healthcare environments have always required additional levels of protection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Amendment 4 substantially revises Section 710 covering Medical Locations, including updated requirements for testing and documentation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Although these changes primarily affect specialist contractors, they represent an important update for anyone involved in healthcare installations.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><a>What Does Amendment 4 Mean for Electricians?<\/a><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For most electricians working in domestic, commercial and industrial installations, many day-to-day activities will remain familiar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, anyone involved in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Inspection and testing<\/li>\n\n\n\n<li>Electrical design<\/li>\n\n\n\n<li>Solar PV<\/li>\n\n\n\n<li>Battery storage<\/li>\n\n\n\n<li>EV charging<\/li>\n\n\n\n<li>Commercial installations<\/li>\n\n\n\n<li>Smart buildings<\/li>\n\n\n\n<li>Data infrastructure<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">should become familiar with the updated requirements as soon as possible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Remaining current with BS 7671 is not simply good practice\u2014it forms an essential part of demonstrating professional competence.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><a>When Does Amendment 4 Apply?<\/a><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Amendment 4 was officially published on <strong>15 April 2026<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A six-month transition period allows industry time to update procedures, documentation and training. The previous consolidated version remains valid during this transition, before being withdrawn on <strong>15 October 2026<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><a>Do I Need to Take Another 18th Edition Exam?<\/a><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is one of the questions we\u2019re asked most often.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The answer depends upon your circumstances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you\u2019ve already achieved the City &amp; Guilds 2382 qualification, you may not necessarily need to sit another examination immediately. However, you <strong>do<\/strong> need to ensure your knowledge remains up to date and that you\u2019re working to the current edition of BS 7671 whenever applicable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Many electricians choose to complete an Amendment 4 update course rather than wait until the changes become mandatory.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><a>Preparing for Amendment 4<\/a><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The best way to prepare is to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Obtain the new Orange Book (BS 7671:2018+A4:2026)<\/li>\n\n\n\n<li>Understand the new sections and revised chapters<\/li>\n\n\n\n<li>Review how the changes affect your everyday work<\/li>\n\n\n\n<li>Complete structured Amendment 4 training<\/li>\n\n\n\n<li>Practise with realistic exam-style questions if you\u2019re planning to take the City &amp; Guilds qualification<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Keeping your knowledge current will help you remain compliant, improve confidence on site and demonstrate continued professional development.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><a>Learn Amendment 4 Online<\/a><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you\u2019re looking to understand the new Wiring Regulations without attending classroom training, our online <strong>18th Edition Amendment 4 course<\/strong> has been designed specifically for busy electricians.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The course includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Easy-to-follow video lessons<\/li>\n\n\n\n<li>Step-by-step explanations of the new regulations<\/li>\n\n\n\n<li>Practice questions<\/li>\n\n\n\n<li>Tutor support<\/li>\n\n\n\n<li>Study at your own pace from home<\/li>\n\n\n\n<li>Preparation for the City &amp; Guilds 2382 examination<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you\u2019re renewing your qualification or simply updating your knowledge, our online course provides a convenient way to stay current with the latest edition of BS 7671.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Find out more here: <a href=\"https:\/\/the-regs.co.uk\/coursedetails\/18thedition.php\">https:\/\/the-regs.co.uk\/coursedetails\/18thedition.php<\/a><\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><a>Final Thoughts<\/a><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Amendment 4 is much more than a routine update.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It reflects the way the electrical industry is changing, with greater emphasis on renewable energy, battery storage, intelligent buildings and digital infrastructure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Electricians who understand these changes early will be well positioned to remain compliant, provide better advice to clients and continue working confidently under the latest edition of the Wiring Regulations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As further guidance and practical interpretations emerge throughout 2026, we\u2019ll continue publishing clear, practical articles to help electricians stay informed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Everything Electricians Need to Know Published: June 2026 The publication of BS 7671:2018+A4:2026, commonly known as Amendment 4 of the 18th Edition Wiring Regulations, represents the latest evolution of the UK\u2019s national standard for electrical installations. As electrical technology continues to develop at a rapid pace, the Wiring Regulations must also evolve to ensure that&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[75],"tags":[74,73,72],"class_list":["post-879","post","type-post","status-publish","format-standard","hentry","category-bs7671-a4_2026","tag-18th-edition-amendment-4","tag-amendment-4-bs7671","tag-bs76712018a42026","th-blog blog-single has-post-thumbnail"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>BS 7671 Amendment 4 (2026) \u2013 Everything Electricians Need to Know - the-Regs : BS7671 18th Edition Online Training<\/title>\n<meta name=\"description\" content=\"What&#039;s changing in BS 7671 Amendment 4? 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