Consumer units 🇬🇧 UK
Does a consumer unit need to be metal?
Yes in domestic premises: the CU/switchgear assembly must have an enclosure made of non-combustible material (or be inside a cabinet of one), e.g. steel.
Regulation: BS 7671:2018+A4:2026 421.1.201.
Study aid in plain English, not the text of the standard. Always check the current BS 7671 and your local rules. Electrical work must be done by a licensed or registered electrician.
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