We are having a large side extension done at the moment and are planning on installing Qubino Din Dimmers around the house in some nice Wylex consumer units and strategic locations.

I see however that the wiring regs have now been updated and say that all consumer units should be metal, fair enough but it also says that similar units need to be non flamable too!!! Does that mean that I will have to fit my dimmers in a metal box which will affect there wireless range or can I still use plastic boxes for them?