# The Electricity Supply Regulations 1988, Regulation 21: Protective measures


The supplier shall apply protective devices to every system which will, so far as is reasonably practicable, prevent any current, including leakage to earth, from flowing in any part of a system for such a period that that part of the system can no longer carry that current without danger.

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Source: https://www.legislation.gov.uk/uksi/1988/1057/regulation/21 (the official version)
Page: https://openlegislation.uk/electricity-supply-regulations-1988/regulation-21
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.