Guidance Note 6: Protection Against Overcurrent, 9th edition

Guidance Note 6: Protection Against Overcurrent is a key guide to this important area of BS 7671.

• Changes within the BS 7671:2018 standard include:


• Protection against electric shock


• Protection against thermal effects


• Protection against voltage disturbances and electromagnetic disturbances


• The installation of renewable energy storage systems,


• Recommendations for Arc Fault Detection Devices (AFDDs)

It is intended for all involved with specifying, designing, installing or verifying electrical installations and has been fully updated to BS 7671:2018:2022.

BS 7671:2018+A2:2022 incorporates changes from the first amendment, published in 2020, regarding Electric Vehicle Charging Installations to provide greater guidance on embracing changing technology within this sector. Additional changes within the second amendment include protection against thermal effects and fire caused by electrical equipment, protection against voltage disturbances and electromagnetic disturbances, and a new chapter on prosumer's low-voltage electrical installations covering energy efficiency measures, the interface with the smart grid, the management of electricity consumption, the management of renewable sources of electricity, and energy storage.