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ok, Im from US but i think i can help you, how many terminals does the new dimmer switch have? IE how many wire attachments can be made on the new dimmer 3 or 4?
and is this wiring diagram helpful to you?
sounds good, hope you get it straight :)
Hello, If you have only 3 terminals it would be best if you selected either of the other two boxes (or switches). It seems you found the middle switch. If you open either of the other two boxes that control that one light you may be pleasantly surprised to find only 3 wires :)
Would relocation of the dimmer be acceptable? It is by far the easier alternative.
OR you could trade in your current dimmer for a (4 way switch in US) switch with the four terminals. It works the same here, we just call it different things.