House connection box seal

I cannot switch off the box behind the meter because the installation is old. Therefore, the fuse must be removed at the main box.

Hi
only a certified craftsman approved by the supplier is allowed to work on anything that is sealed. They will then also attach a new seal afterwards.
Take the opportunity to have a preliminary fuse installed for each phase in the distribution box, so that in the future work can be done safely on the installation without this effort. If there is enough space in the box.