I like that!
Option 1) There does not appear to be a feed into lhs knife switch, but a lot of wires going into the top so, this could be a 'parking terminal'. Too many earth wires so middle one is an earth 'parking terminal'....no, hang on a minute, got it now, isolator for Mother in Laws new massage chair! [Linked Image] I would love to get my hands on this and find out 'what it all does'
I am guessing that it is a factory handymans botched attempt at wiring a machine that needs a 3ph supply, but at least he sleeved the cpc!! where is it????
This could go on a long time