Having worked in various data centre's for quite a few years, you get to see the occasional failure.

A mid sized UPS's bypass relay meltdown, due to failure to correctly tighten wiring to the relay during factory assembly.

DC Chiller drain pump failure needed some smart thinking to get it running again after hours.

Yes, that is a length of the outer cover of a stripped cat5 cable, handy when there isn't some tubing handy.

Assembling a Data Centre, rack by rack.

Chillers are a two man job

PDU anyone?

Sometimes a bit of lifting is involved