Not really relevant to the subject of this thread but looking at the photo the installation looks a bit of a mess you need some blanks in those boards.
What is he function of the second top db with two mcb`s in it ?
You have a couple of spare ways in the bottom board have you had some circuits removed?
What is he function of the second top db with two mcb`s in it ?
You have a couple of spare ways in the bottom board have you had some circuits removed?