My wife has been told by an electrician who was at our our house to install some sockets in our newly built conservatory that there is no earth bonding to our water pipe and that he could not find any other earthing for our system!! I am not sure if it was that he couldn't find it or if we really don't have any? Our house is not all that old, was built in the late 70's or early 80's. What should I do?, the electrician has (quite rightly) not connected the conservatory circuit to our mains (left me to do it). Is this a job I can tackle myself?? (the earthing that is, not connecting the sockets)