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Changing and old two switch light switch.

Discussion in 'Electrics UK' started by Daftbat, 12 Aug 2020.

  1. Daftbat

    Daftbat

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    Hi,

    Small query about doing the above from an amateur.

    The switch located in the hall controls one hall light and the kitchen light it's plastic and has two rocker switches.

    I was hoping to just be able to swop the wires directly from old to new - but the new switch terminals are labelled differently and obviously don't want to get it wrong.

    On the old switch (in the picture MK brand) left to right the top terminals are L1, L2, Common. The bottom ones, Common, L1, L2.

    On the new switch (in the picture Crabtree brand) left to right the top terminals are L1, L3, L2. The bottom terminals L3, L2, L1.

    Please could you advise how I wire the new switch ? Old light switch 2.jpg New light switch.jpg
     
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  3. aptsys

    aptsys

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    Old Switch - New Switch
    COM - L1
    L1 - L3
    L2 - L2


    There is a dividing line to be aware of, the connections are actually swapped top and bottom physically. The dividing line shows which terminals to use for each gang.
     
  4. ericmark

    ericmark

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    Make sure yellow is in L1 (com on old switch) @aptsys hax given the correct answer but if both switches of two way both up does no equal off swap red and blue of three core and earth.
     
  5. aptsys

    aptsys

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    Switch direction should be correct if the inscriptions on the switch are to be believed. Essentially the wiring should look exactly the same only flipped top to bottom.
     
  6. Taylortwocities

    Taylortwocities

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    as above, the two switches are laid out side by side like this


    the new switch is labelled differently as @aptsys has shown.
     
  7. Daftbat

    Daftbat

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    Thank you to everyone - now understand, particularly the significance of the dividing line and having to swap top to bottom for each actual switch.

    Thanks again.
     
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