Yeah, I've seen ip56 models, but I think most are designed for garages, I haven't noticed any fully featured or split load types though. What are the models you were looking at?
i seem to remember there is an IP4X requirement for zone 3 which i can't see any way of meeting this requirement, not sure about outside the zones though, but as stated the regular condensation does not miraculously stop at the outer edge of zone 3.
Having a chat at work yesterday and this came up....Is it possible to have a consumer unit in a bathroom? If so under what conditions? would it have to be in a lockable cupboard with a certain IP rating? If it was in a lockable cupboard (or one only openable with a tool) would this in itself...