Some pictures of our mining rig 
Do not you have enough money from your pre-orders to buy some PDUs? Hope you don't burn the warehouse with all the rigs inside...
This is one lame and unprofessional setup from a H/W manufacturer...
Took me a while to figure out exactly what you were complaining about.
The yellow wires are ground, the breakers indicate the brown is hot, and the blue would be neutral.
The terminals will be live. The terminal block is probably designed to go into some kind of enclosure. The point of entry into such an enclosure would be the logical place for strain-relief.
I guess they can still pull a single machine out if they unplug at the box.