My parents moved into a new (well, old but new to them) house about five years ago. There was an unusual bathroom downstairs. It was decided to turn it into a utility room.
Whilst dismantling the shower – and this is the bit I am unsure about – my dad said he could ‘feel’ the electricity. He called an electrician to test it and sure enough, should anyone have used it, it would’ve given them a very nasty surprise.