Confused by Wiring on Light Switch

Discussion in 'Electrics UK' started by richard266, 15 Aug 2014.

  1. richard266

    richard266

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    hello everyone,

    I have a light and extractor fan switch on the entrance to my bathroom which I am attempting to replace. One switch controls light the other the extractor fan. I have attached a link to a diagram of what I have on the back of the existing wiring and the configuration of the new switch. All of the light switches in stores that I have seen have this same layout. I was hoping to just swap one cover out for a new one but the configuration is toally different - house is around 17 years old. My problem is understanding what wire goes where... I have labelled the wires on the top diagram A, B, C, etc. and would appreciate some help and advice as to what goes where. The bottom half of the diagram shows the rear of the new switch. Hope someone can help.

    [​IMG]

    Also all wiring is red!

    thanks,
    Richard
     
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  3. OwainDIYer

    OwainDIYer

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    The terminals are, actually, the same, if you take the right-hand switch on your new switch and mentally rotate it through 180 degrees.

    Common is the same on all switches for AED; use the '1 way' terminal on each new switch for B and C respectively.
     
  4. richard266

    richard266

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    Thanks for the speedy reply.

    I think I understand but I thought a diagram is better than a shock...

    So like this?

    [​IMG]
     
  5. bernardgreen

    bernardgreen

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    E is required to link the A and D wires

    One of them is bringing power to the switches and the other is taking power on to other switches. Without it those other switches will have no power and their lights will not work.
     
  6. richard266

    richard266

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    Thanks again.

    So like this?

    [​IMG]
     
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  8. OwainDIYer

    OwainDIYer

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    you got it.
     
  9. richard266

    richard266

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    I take its that B or C dictate which item is switched on either light or extractor - so if they ended up on different switches I could swap these over?

    Thanks to everyone who posted and solved this for me.
     
  10. diyer56

    diyer56

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    Yes B and C are the supplies to the light and the fan. If the switches are the 'wrong way around' B and C can be swapped.
     
  11. richard266

    richard266

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    I'm confident that I can tackle this - Many thanks for the help and advice.
     
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