unfortunately, I am limited to 89cm doors
so every part of equipment has pass a stairway (if it does not fit the elevator, which is not made for pallets!) and then through a standard door.
3p is actually not really forseen but we have all three pases available in the fuse-panel so quite easy job to add a ceee connector
Back to the mesh solution, I will give it a second thought ... just want to mke sure to have the good solution - no time or money to do it twice.