thats what it is. seems to have been OK back the days (this panel is 30 years old).
thats actually our panel, where my PC is running on [Linked Image]. never hat problems with the neutrals. is it permitted to do this now? i dont have to deal with building installations this often, the new panels all have 20+ ports for N and GND. and even these are touch-proptected!

i wanted to mount breakers in this panel for a longer time, but it still runs fault free, and our safety regulations get in my way here. I may do this work, but must have a "Master" to check it and measure all outlets before the Energy supplier reconnects it!

is the "master" title common in UK/USA?

in germany, you begin doing a "Training" for 3 and a half years at an industrial or electricians company, go to school and do several final examinations. thats what i did so far. then you can get your "master" title by half a year of school, go to a technicians school for 2 years and so on...