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Need bathroom fan isolator switch enabling 2-way switching

Discussion in 'Electrics UK' started by nicciglen, 26 Feb 2010.

  1. nicciglen

    nicciglen

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    Hi

    I have an extractor fan installed in my bathroom which is triggered by the light switch (on a pull cord). There is an isolator switch installed just outside the bathroom that enables me to stop the fan from being turned on by the light and thus leave the fan off completely.

    Here's the thing ... in addition to this, I now need a "mode" to be able to turn the fan on independently of the light, so that I can turn the fan on without having the light on.

    Is it possible to get a switch with multiple positions (or something similar) that will allow me to do this? i.e. (1) Turn the fan on and off with the light pull cord (2) Turn the fan on and off independently of the light pull cord - so I can have the fan going with the light left off.

    Thanks

    Glen
     
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  3. GaryMo

    GaryMo

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    Is it a timer fan? If so, would it not be simpler to just flick the light on then back off starting the timed sequence?
     
  4. FrankE

    FrankE

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    Considered other controls for the fan, which aren't dependent on the light going on eg a humidistat?
     
  5. Steve

    Steve

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  6. 1john

    1john

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    you can / could get a two way fan isolator switch, i have seen them a few years back, i remember it well because i couldn't think of any use for it.
     
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  8. nicciglen

    nicciglen

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    Many thanks on all the replies so far.

    Nope, it's not a timer switch. I had a light activated fan on a timer switch in a previous house and hated it because the fan would needlessly rumble on for a while even if you just needed to turn on the light for a few seconds. But yes, that is indeed an option if I can't find another manual solution.

    I would prefer a manual solution to do the trick if possible, rather than occupancy sensors etc. I asked my local electrical wholesaler if they sold a two way fan isolator switch and they didn't. So maybe I just need to look around for one further afield or from an internet retailer..

    Thanks, .... any more ideas most welcome ;)

    Glen
     
  9. Chri5

    Chri5

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    Chane or adapt the fan to include a intergrated pull cord, it might even have the switch already inside the fan housing.

    You would have to lose the function of switched live to the fan, so the fan never comes on with the lights, but you would then have the ability to choose via manual switching when you want the fan on and when you want the lights on.

    The regs on fans will allow such a setup only if the room has a window. If the room has no natural light and no natural venting then the existing setup should remain.
     
  10. ban-all-sheds

    ban-all-sheds

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    Surely any 3-pole 3-position (or 2 position + off) switch which is adequately rated will do the job?

    e.g.

    [​IMG]

    (Other switches and other suppliers are available)


    OK - that one is slightly over-rated :D but packaged like that they are aimed at high-current applications, e.g. stand-by generator connection. If you search RS Components, for example, you'll find lots of smaller switches, but you will have to sort out your own enclosure.
     
  11. SUNRAY

    SUNRAY

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    Why not just use a second, 2way, pull switch to select either 'on' or 'light' followed by the isolator?
     
  12. DIYnot Local

    DIYnot Local

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