Many homes I see have these socket covers fitted without any thought as to what effect the cover may have. Plastic socket covers are often sold on the grounds of making standard 13amp sockets safer for children or toddlers. These are the sockets which you will find in your home, schools, nurseries or place of work. On the face of it, a plastic, non conductive cover over what appears to be a hole into the dark and mysterious world of live electrics seems to be a good idea. But