Whilst I understand and agree with the separation of the concepts of ‘earthing’ and ‘bonding’ you should not take this too far. In the example I gave the only role of the bonding in protecting against the fault under consideration is to limit touch voltage. It is definitely not to maintain or create equipotential. Now in some other situations it will. These can include faults from outside of the installation and faults on adjacent circuits. In most cases we are dealing with ‘faults’ that are related to the fact that our supply network is earth referenced – so earthing is very relevant. I am leaving aside special situation such as earth free locations. With regard to the ability of those entering the industry – I left school at 15 with no qualifications at all – I now have a degree, so anything is possible . For my sins I spent around 8.5 years as a full time college lecturer: 5 year with craft apprentices between 1975 and 1980; the rest with HNC students. I continue to do some part time teaching. These days it tends to be just the 17th Edition courses which I do on behalf of one of the industry bodies – all you ever wanted to know about BS 7671 in 3 days including the exam . So I do have some idea of what is out there but as I said above – anything is possible .