IET, Code of Practice for Low and Extra Low Voltage Direct Current Power Distribution in Buildings

This Code of Practice provides comprehensive guidance on the safe and effective application of low and extra low voltage (LV & ELV) direct current (d.c.) power distribution within buildings. It covers all aspects of design, specification, selection, installation, commissioning, operation, and maintenance of d.c. cabling and wiring systems. The guide addresses solutions for telecommunications cabling, the use of existing a.c. wiring, and new d.c. infrastructure, as well as recognised standards and proprietary d.c. power systems. With the growing use of d.c. devices—such as consumer electronics, IT equipment, solar PV, and battery systems—this document is an essential resource for designers, installers, and operators in electrical, IT, and telecommunications fields, as well as building owners and insurers seeking to optimise energy efficiency and space utilisation.