Suspended ceilings are a fantastic invention from a cabling perspective, because they reduce the need for unsightly trunking and hide a multitude of sins when it comes to drilling and fastening.
Unfortunately, the disadvantage of them being able to hide a multitude of sins is that they hide a multitude of sins.
There are half a dozen of these dotted around the ground floor of one of our buildings. None of them are wired to anything, just bare contacts at the end of an expanse of yellow electrical cable.
We’re pretty sure they’ve been up there since the place was built 15 years ago.