True. I was talking about as situation in which overload protection is actually required - and, as you say, in some situations some people will argue that the load is such that an 'overload; is 'unlikely', such that the regs only require fault protection.
I can't think of any particularly good reason why that argument cannot be used in relation to a circuit (hence cable) supplying (only) an electric shower, but I have to say that I don;'t recall having seen the argument used in that context.
Kind Regards, John