The IET has announced that the latest amendment to the UK’s national standard for low-voltage electrical installations, BS 7671, will be available from 15 April 2026.
Co-published with the British Standards Institution, Requirements for Electrical Installations: IET Wiring Regulations is a rulebook used by electricians, electrical engineers, inspectors and building control to ensure wiring is safe and legal.
The 18th edition of the rulebook, BS 7671:2018, was published in 2018. Since then, several amendments have been issued, and the fourth amendment will be available for purchase from April, featuring an orange cover.
BS 7671 is based on European standards, which in turn are generally based on international standards. According to the IET, standard development is an ongoing process to take account of new technology and product development.
The changes in the new rulebook reflect the evolving nature of electrical installations, and include areas such as solar photovoltaic systems, battery...