Can I use VOELCB as Main isolation switch

[JohnW2]

But much lower if someone had got out of a shower and touched a radiator that was one of the paths, (or one foot in the water of a pressed steel bath).

That's obviously why we have (and are required to have) main bonding. Provided the entire building is constituted as an 'equipotential zone (by bonding together all possible paths to earth), it doesn't matter how many such paths they are. You seem to be talking about the (real) hazards which may exist if one does not have that bonding.

The point I am trying to get across to the OP is to stop 'playing' around with this and get it sorted properly to avoid any potential incidents.

I don't think many of us would disagree with that, but I don't think the above has much to do with it.

Kind Regards, John

 

[Stuart981]

But much lower if someone had got out of a shower and touched a radiator that was one of the paths, (or one foot in the water of a pressed steel bath).
The point I am trying to get across to the OP is to stop 'playing' around with this and get it sorted properly to avoid any potential incidents.

I am not playing around and I am trying to get it sorted. That's why I am asking questions. I would gently suggest that is how human beings progress. When we don't know the answer to a problem then we ask people who are more knowledgeable than ourselves.