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Lighting question

Former Community Member
Former Community Member
So today I wanted to add another switch in a house.


The extra switch would need to now include an intermediate due to it being already 2wY.


now when I took the switches off, one switch the common has just a single sheath core, the L1 and L2 are a 2 core cable L1 being Red and L2 being black.

This is exactly the same in the other switch.


I thought this must mean there is a JB somewhere ? In the light fitting there is 3 T&E, and 1 single cable which goes into the lamp live! 


I just can’t understand how this could be wired? 


Any ideas?
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    I'm pretty sure there will be a Joint Box (JB) hiding somewhere under the floor or in the walls.



    More likely the single core permanent L has just been 'borrowed' from another nearby switch (on the same circuit if it's been done nicely) - saves a few of metres of cable over taking it from the rose. No JBs required.


       - Andy.
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  • 0

    I'm pretty sure there will be a Joint Box (JB) hiding somewhere under the floor or in the walls.



    More likely the single core permanent L has just been 'borrowed' from another nearby switch (on the same circuit if it's been done nicely) - saves a few of metres of cable over taking it from the rose. No JBs required.


       - Andy.
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