Ross asks this question, which is about any functional earth connection regulation associated with a domestic electrical installation. It has been answered by the NICEIC (Theme – Regulation and Legislation):
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Question: Is it a regulation requirement to have a functional earth connection in home wiring?
Answer: Functional earthing is used for purposes other than electrical safety.
It is generally used to allow equipment to operate safely. In home wiring, it would only be required where there was equipment that required functional earthing for its operation.
The connection of any functional earthing should be made to the installation’s main earth terminal and be clearly labelled as to its purpose.
Where used, the conductors should be identified in accordance with Table 51 in BS 7671.
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