[RainbowSix]

That is often a company policy (as it must have been with the hospital too) as items from home may not be checked and if a faulty appliance is then used in the workplace and someone is harmed the company may become liable due to their allowing it.
Hence no using your own kit.

Pubs are notorious for having bad electrical installations, things have grown over the years, money not spent where it should have been etc.
If the fitted appliances/charging points were new then there is no need to test them as there is an assumption that they have just been tested by the manufacturer.