Hi @kezo The installer came this morning and said the main fuse was burning hot about 30 degrees. He called the DNO to replace it as an emergency. So waiting for them now. He did say about the EV charger tails going into the main consumer unit and that they should be going to the Henley blocks. He said to ring Ohme when the DNO have done and he will change the tails.
Thank you for the update – Im not going to openly speculate on the DNO side. What I will say is, the emergency electrician was just that, to check the cause of the burning smell, including that of the DNO’s side, as we have a duty to notify the DNO, rather than being to too eager to up-sell a new consumer unit. At least you will get the great pleasure of telling him what the fault was, he was paid to find, when he comes tomorrow:-)
Fair do’s to the Ohme installer though, for wanting to come back and put the install back to how it was fitted. Thats not to say it can’t come from the CU, but it should come from the non RCD side, which your hasn’t and there’s always the possibility of overloading the main switch 63A RCD in your case if more circuits are added, as explained previous. Hence, by far best practice, is to install a charger is off its own supply has it was when first installed.
I’d like to think the DNO will fit a new modern service head, but won’t count my chickens just yet, but above all safety is always first priority.
Please read my writing in Bold from my previous comment and ensure the electrician is aware tats what you expect to be done when he come tomorrow. Of course if he doesn’t show we can cross that bridge when everything is safe:-)