Shocking story, gave me quite a jolt reading it.
I dont know what the current procedure is personally, but expect a lot of resistance. Try to go with someone who wont charge you.

Sounds nasty. You need to talk to a lawyer though, not a bunch of computer geeks!
The plugs in question are blue , 240v round plugs, not the kind you get at home. The ones you normally get on a 110v grinder if you know what I mean?

They will be atleast 13a minimum for this kind of appliance - quite likely higher - so that he nearly died isn't so far fetched.
I'd ignore most of the posts on here and seek professional advice on the matter there is a potential scenario for negligence here tho it could be as likely your own as the company you work for or a 3rd party we can't really tell without more information - but you can't really leave it in a situation where someone else could potentially be at risk.
I think youre talking about the mcb/fuse, the rcd has nothing to do with current supplied. Its do with the imbalance between the neutral and line.
So 30ma sounds about right.
Potentially fatal yes, There is no guarantee that a RCD will trip when it is meant to.
Still would like to know what this bracket and sensor is? Are you meant to move them? Do you need tools to move them?
work should not be started on an appliance until it is isolated.
So you messed with something that you've already admitted to not being trained to mess with. This something gave you an electic shock because you messed with it. The thing which stops idiocy like yours causing fatality worked.
Now you want money because you could have died?
Lol.

Not really,
It sounds like a 16a/32a RCD socket outlet to me
http://www.screwfix.com/p/mk-comman...25wJhG221q8w2DhLjW1DtcrjDc6Yg1CNQnP!312381625
Fairly common place in commercial/light industrial settings.
Edit: Oh you mean they should be isolating before cleaning? not just "putting bags over" equipment, Yeah sounds like bad practice to me also.