Had a company come out the other day to install one of new meters in house didn't tell him I was a spark but he couldn't give me an answer when I asked hoe come my tails have to be 25mm and there's are only 16mm also asked him why my earth was 25mm and there earth is of smaller size can any one tell me why the lad must of been made up to get out my house makes you wonder if he was a spark as he never answered one of my electrical questions can any one tell us why they use different reqs to us