Thx. I agree with not creating unnecessary threads. When you type in a title to a new thread, the system does a search presenting threads of similar topic, so as not to craete an unnecessary thread. That is why my titles tend to tell the story. None came up.There are threads on this subject already, such as Back box earthing - https://www.electriciansforums.net/threads/back-box-earthing.176847/
It may be prudent to do a search about any question you may have before posing a new question as there is a wealth of information already available on the forum, you are likely to find your answer much quicker.