What makes a ceiling fan unique ?

The regulations state that a ceiling fan, being a fixed appliance needs to have an isolator unless it is supplied through the earth leakage relay.

I read this to mean that if the ceiling fan is on earth leakage then it does not necessarily need an isolator.

Why not also a bathroom extractor fan, air conditioner or gate motor supplied with 230V ?

Trying to understand what the reasoning is behind this regulation. Why only a ceiling fan ?


Derek