Isolator on extractor fan

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Im refitting my bathroom at the moment and getting electrics sorted before the ceilings done.

Current fan and isolator are as pictured.

Plan for wiring is as follows;

Screenshot 2025-12-13 at 15.27.43.png

When I moved in the Isolator lead was gone so can't test it, does this mean it's connected to switch live currently?

Can I remove the isolator ? Is it needed on regs? I read it's on Isolator for maintenance so won't be a problem tbh for me.
 
When I moved in the Isolator lead was gone so can't test it, does this mean it's connected to switch live currently?
Which lead do you mean and what do you mean by 'gone'?
Plus we would need to see which wire is connected to what; not just a cable between two accessories.

Can I remove the isolator ? Is it needed on regs? I read it's on Isolator for maintenance so won't be a problem tbh for me.
Yes, you can remove it. It is not a regulation requirement.
 
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It looks to me from your drawing that the isolator can be used to switch thhe fan independantly, but can't say for certain without a proper circuit.
You may be able to short out the isolator but it depends whether you have a timer model or not.
 
When I moved in the Isolator lead was gone so can't test it, does this mean it's connected to switch live currently?

Can I remove the isolator ? Is it needed on regs? I read it's on Isolator for maintenance so won't be a problem tbh for me.

It is not a requirement, but is sensible to have one fitted. If the fan has a built-in timer, then a three pole isolator would be needed, to isolate neutral, live, and switched live.
 
I mean the Isolator cord has gone, it was obviously pulled off.

Come to think of this, in the other bathrooms I've got the fan coming on when I don't have the isolator on.

The Fan's don't have an overrun they are from 1998 lol. I'd probably want the fans being controlled in some way when they go in as I wouldn't want it on continuously when in the bath for example.
 
So if you don't want a fan running when your in the bathroom and you take away any switches specifically for the fan, how do you propose to run the fan.

The idea of a fan is to remove moisture from the air before it forms as condensation on the cooler surfaces (Walls. windows etc) so should be running during the bath/shower etc then run on for a time afterwards until the air is dry.
 
Sorry, only experienced noisy fans over the years.

Can of worms on this, I'm wondering whether it might be better to just move the light switch and isolator to a switch outside the room near the door and then do an inline fan. The original build of the property only ever had a bath not a shower.

The rooms 1.7m x 2.7m so not big though so I'd worry about noise tbh.
 
Sorry, only experienced noisy fans over the years.

You can get very good quiet ones now, with ball-bearing motors on rubber mounts, and redesigned fan blades. Also online fans by the same naker, but more powerful and very suitable for a steamy bathroom.

You are allowed to have switches inside a bathroom, provided they are away from any fixed bath or shower.

How high is the ceiling above floor level?
 

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