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Insulated vs Metal
Amendment 3 testing

During the development of the Design Range of Amendment 3 non-combustible compliant consumer units, extensive testing was conducted to ensure that the product design met the requirements and intent of the regulations, enabling Hager to advise on installation techniques.
The following video demonstrates the performance of an insulated consumer unit, compared to the performance of the equivalent steel version with the same test procedure being employed on both products.

The test process involved inserting a hot-wire through the outgoing cabling and energising it to maintain a temperature of 960 °C for two hours. 960 °C relates to a glowing loose electrical connection. The hot-wire test principle assisted in the development of Regulation 421.1.201 and in particular, illustrates why ferrous metal, e.g. steel, was deemed to be an example of a non-combustible material for the consumer unit enclosure.
9275211.7824

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