Hello all, Couple or so years ago someone on this site had produced a lovely document showing the above from 5A up to 100A with various protective devices. Not only as permitted by BS7671 but also showing 80% values as per OSG/NICEIC. Mine has been destroyed with water and not got another copy. Would any of you fine chaps have a copy that you could send me. email@example.com Many many thans for your help.