I spent some time trying to decide if it was better in the General board or non-US board...
RCD stands for Residual Current Device.
I did't know it was an electro-mechanical device. Here our GFCI's sre controlled by a computer chip and sense the current usinf a biased current transformer torrid which also can tell if the nuteral is connected properly. I understood that RCD's were intended for life safety; is this true? Just that they have a different trip curve?
AFCI's work by sensing the shape of the current curve to tell when a sustained arc is taking place. Many AFCI's also have GFCI functions in them as well. We're required to install them in any circuit that serves a lighting or utility outlet in a bedroom in a dwelling. Not any other room, just bedrooms...
