Thanks!
Lets clear the easy thing up first: The replacement of a consumer unit in a dwelling in England and Wales is notifiable work and must be certificated for compliance with Part P of the Building Regulations. Therefore, an EIC or DEIC should be issued to the client on completion (Regulation 644.1). To ensure the person issuing the certificate is only accepting responsibility for the work undertaken (the replacement of the consumer unit and the safety of the circuits connected to it) the description of work should be recorded accurately and a tick should be inserted in the appropriate box on the certificate to indicate that the work involves the replacement of a consumer unit.
If a consumer unit is replaced every circuit must be tested and any defects that affect the safety of the installation must be corrected before the EIC is issued. (reg 644.1.2).
If the consumer unit is replaced and no circuits have been changed the EIC will cover the consumer unit. If a change of circuit or supply i.e the EV consumer unit supply has been changed from the henley blocks to the new consumer, that then becomes part of the EIC because a new circuit has been added to the CU. (I don’t know (if) why he would change the EV consumer supply and not kept it seperate from his work)
Moving on:
Glad to see a dedicated MCB, rather than trying to stuff them in the main switch with the 25mm tails, so thats one good point however, its normal practice to come off the non RCD side when supplying an EV consumer unit with a Type A RCD/RCBO, due to the potential of blinding upstream and downstream RCD’s/RCBO’s
Could you please take a close up picture of the of the RCD next to (directly to the right) of the EV charger MCB?
When the MCB tripped running said white goods last time, did it also trip the RCD?
Would it be possible to run the white goods that tripped the MCB for a short while (tomorrow is ok) and see if there is any whiff of burning smell? As I’m not convinced its that, now you have had your CU changed because, it would be be shoddy workmanship not to carry out tests required, inc checking for circuit faults before changing the CU. On that note, make sure you get the EIC.