This may be the longest post I’ve ever published, regarding the Server Technology PRO1 Switched STV-4540 Rack PDU:

The Server Technology® PRO1 Switched Rack PDU provides control of outlet power and local LED input current monitoring, allowing IT personnel to determine safe levels of loading on a per-phase basis while installing equipment into the rack/cabinet.

And here it is. The full height and outlet spacing are brilliant; only needing short power cables to wire up a rack of equipment saves so much space and potential for spaghetti.

Long photo of the above hardware