Utterly confused to courses

[Martyn Fletcher]

Someone correct me if I'm wrong but I my understanding of the 17th edition regs is that you can have a 230V luminaire directly above a bath or shower and within zone 1+2 provided it is of IP4X or higher (although many would recommend an IP65 for this zone). If it is more than 0.6m away from the edge of the bath or more than 2.25m above zone 0, then there are no special requirements for the fitting as this is considered to be outside the zones.Manufacturers instructions notwithstanding. My understanding also, is that ALL bathroom circuits must now go through a 30mA RCD, even circuits not supplying the room but simply "passing through".
If this was my installation I'd be trying to conform with current regs.