This British Standard provides recommendations for earthing of electrical installations, including:
a) protective earthing of low voltage installations to BS 7671;
b) the interface between LV and HV substations conforming to BS EN IEC 61936-1:2021 within buildings;
c) protective earthing arrangements for generators running in parallel with a distribution network operators (DNO) or a private HV/LV transformer supplying low voltage installations;
d) protective earthing and changeover switch arrangements for UPS and generators supplying low voltage installations; and
e) AC supplies derived from DC supplies, e.g. solar, batteries, wind.
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Status: Open to public comment until 10 September 2025
Contact details to comment or for more information:
technical@eca.co.uk