Half-redundant feeds
Reminds me of a situation I once encountered with a piece of network kit that had two (redundant) PSUs. Each PSU had a small handle at each end to allow it to be smoothly pulled out of the chassis.
The problem was that whoever had installed them had used the handles on PSU B as cable management for the power feed to PSU A. There was insufficient slack in the cables so, if PSU B failed, it was impossible to replace without first disconnecting PSU A.