Why is it important to request Type test certification? 

In this article, Contactum looks at some of the compliance requirements of BS EN 61439-3 and the responsibilities manufacturers have to fulfil before certification is granted. The company shares excerpts taken directly from its Defender 2 test reports. 
Within BS7671, the Wiring Regulations, Regulation 421.1.201 states that “within domestic (household) premises, consumer units and similar switchgear assemblies must comply with BS EN 61439-3…” Certification to BSEN 61439-3