Oh, and while i'm at it, you seem to have maintained your sanctimonious and obnoxious approach to posters on this site, given that you proudly undertake DIY electrics.
Can you explain what's sanctimonious or obnoxious about that? Being in a situation where existing cables won't reach a CU could easily have meant (as it appears it did) that the OP was replacing, or moving, a CU, and there are all sorts of ramifications to that.
So it seemed reasonable to ask why he needed to know.
people like yourself can through restricting information cause others to guess and endanger themselves.
None of the information you need is restricted, it's just that you'll have to go about getting it in a structured manner which ensures that you also get all the other information you need which you may not even realise you don't know.
Can you explain what's sanctimonious or obnoxious about that? It's perfectly true that what he needs to know is not restricted, and it's also perfectly true that learning enough to move or replace CUs should be done properly, and that the job should not be tackled on the basis of just asking questions here that happen to occur to him.
Or do you disagree about that?
Replacing a CU is a very non-trivial task, and to do it properly requires knowledge and skills which you do not possess and which you cannot adequately acquire just by asking the odd questions which happen to occur to you.
Can you explain what's sanctimonious or obnoxious about that?
Do you disagree with it?
Being intelligent I will go to the library and not create any risk.
You'll find a reading list
here.
Can you explain what's sanctimonious or obnoxious about that?
Do you not think that if he plans to go to the library to start his research, a suggested list of books might be of value?
That list of books has been there for over 4 years, and I've updated it 16 times - is there something wrong with it?
If you screw up it will be entirely due to your arrogance in thinking that you know more than the people here who have advised you not to go ahead.
Can you explain what's sanctimonious or obnoxious about that?
He didn't get the advice he thought he should, and so accuses people of arrogance, and it's sanctimonious or obnoxious to criticise him for that?
I don't think so.