This e-book is available through the IET’s digital Wiring Regulations platform. Once you have completed your purchase, details of how to download and access your e-book will be sent to you with your order confirmation.

Low voltage direct current distribution of power within buildings offers advantages over the traditional mains power supply solutions for an increasing number of services.

Low and extra low voltage (LV & ELV) d.c. power distribution allows end users to avoid unnecessary power conversion steps, with potential benefits including carbon savings, energy efficiency improvements and optimisation of space utilisation in buildings. Adoption of d.c. power distribution offers an enabling infrastructure to manage the increasing numbers of direct current power devices in buildings – such as consumer electronics, building services, IT equipment, as well as solar photovoltaic and battery systems.

This Code of Practice aims to ensure the safe, effective and competent application of cabling / wiring installations for low voltage d.c. power distribution in buildings.

Why choose the e-book?

• Simple access with all content available on and offline, no matter where you’re working
• Personalisation with bookmarks and the ability to add notes throughout
• Easy referencing, with page layouts that match the printed books