The data center I work in has 415 VAC power coming in to each rack, with three phases and a neutral. Equipment gets a phase and a neutral, for 240 VAC (though not in a configuration you’d normally expect).
It’s important to remember that everything is contained in equipment made by companies that I trust (Rittal and Eaton and APC). Also, everything is grounded (the doors to the racks, the racks to the cable ladder, and the cable ladder to a special ground), which is in addition to the equipment ground. Finally, I know (and work with) the people who build and maintain the infrastructure.
As for the thick cable, if you’re up to it, here’s a video showing a process for joining the cables together: https://youtu.be/EvWx-VKVvmo
The thing to note, is the layers of copper ground that are wrapped around each conductor line, as well as the bundle itself.
It’s important to remember that everything is contained in equipment made by companies that I trust (Rittal and Eaton and APC). Also, everything is grounded (the doors to the racks, the racks to the cable ladder, and the cable ladder to a special ground), which is in addition to the equipment ground. Finally, I know (and work with) the people who build and maintain the infrastructure.
As for the thick cable, if you’re up to it, here’s a video showing a process for joining the cables together: https://youtu.be/EvWx-VKVvmo
The thing to note, is the layers of copper ground that are wrapped around each conductor line, as well as the bundle itself.