:confused:we have an intermitant problem, whenwe turn on or turn off a light or sometimes unplug something the consumer unit will occasioally trip? It has also tripped during the daytime when nothing is being used. What coud be the problem please?

I give up... what is a "consumer unit"?

Exactly what is tripping? An RCD may just be defective. Best to call in an electrician.

Mis, a consumer unit is a panelboard or breaker box, typically used in Europe, UK, Etc.

Consumer unit - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Consumer_unit)

Ahh... thanks for the info. My experience and familiarity is in the greatest country in the world... the U. S. A.