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Practical considerations for d.c. installations

Advice on the handling of d.c. circuits

Cover image of d.c. installations technical brief  This Technical Briefing is intended to support the IET Code of Practice for Low and Extra Low Voltage Direct Current Power Distribution in Buildings and provides advice on the handling of d.c. circuits. The information is of particular relevance and importance in relation to the following sections of the Code of Practice:

  • Section 6: Proprietary d.c. power distribution over proprietary cabling;
  • Section 7: Proprietary d.c. power distribution over conventional single-phase a.c. power supply cabling;
  • Section 8: Proprietary d.c. power distribution over conventional 3-phase a.c. power supply cabling.

This document addresses both the differences in handling of d.c. and a.c. circuits and those issues that are specific to d.c. circuits. It will be of interest to anyone considering, specifying, installing or operating d.c. power distribution in buildings.

IET Standards would like to thank the Knowledge Transfer Network (KTN) and the IET Built Environment Sector for their support in developing this Technical Briefing.

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