landing light, switches up and downstairs??

[andy5096]

In my hall downstairs I have a 2gang switch which should in theory switch the hall light on and the landing light upstairs. Also on the landing is a single switch to switch on and off the landing light. I have the old Black and red wires which originally looped from one switch to the other in the 2gand switch. I was making a mental note of the old wiring when the phone rang and I forgot the wiring. Can any one help.

The 2gang has one earth, 2 red 2 black and a short piece of red wire which looped somehow??

 

[another_sparky]

sounds like the short red is used as a live feed to the other side of the 2 gang.

are there 3 cables in the landing switch?

 

[andy5096]

yes, 2 red, 1 black, and an earth on the patress..........

 

[another_sparky]

ok.

You dont say whether the cables are 3 single separate cables or a part of twin cable inside a grey sheathed outer cable..
( By twin , I mean there is a red and black in one 'set' - and a red and black in another 'set')

and that leaves a single red.( most likely to be your live feed)

Is this correct?

 

[andy5096]

Yes this is correct. The landing single switch has a grey outer coating with one red and one blck. Then there is a single red one..

 

[another_sparky]

ok. the landing light:

REMEMBER to be sure the power is off!!

LANDING
The single red goes into the terminal marked 'common'
( this is most likely to be the bulb feed to the landing)
then, from the twin set.( sheathed in grey)
the red goes into switch L1
the black goes into L2

A lot of assumptions that it's been originally wired conventionally - so be very careful !

HALL
the other end of the red from the upstairs twin set goes into L1
and the other end of the black from the same twin goes into L2.
( of the 'landing' side of the downstairs 2 gang)

Then,
you take the single red and connect to the hall switch 'common'
then take the small piece of red and connect to the 'common' terminal of the landing side (of the 2 gang)(( to the common on the landing side))
IE linking the 'commons' together.

This should now leave a final twin of red and black.
Insert these into L1 and L2 of the hall switch.

(Of course, the 2 gang , will have 2 twins of red/blk - if the cables arent marked in any way, you may have a problem in identifying which red/black twin actually runs upstairs to the landing.)

Connect and turn back on the power, if the lights arent working as normal. then turn off the power and reverse the cables so that the red and black in the hall side( of the 2 gang) goes into the landing switch side. and vice versa to the hall switch

then power on again and retry.

Be Careful !






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[andy5096]

I did exactly what you said and it now works...That you very much for your help...In future I will write it down instead of trying to remember..

 

[another_sparky]

you're welcome - glad to be of help.

 

[ban-all-sheds]

Are your upstairs and downstairs lights on the same circuit (i.e. same fuse or MCB in the CU), or on separate ones?

If they are on separate ones, then do you know if the neutral for the landing light is from the same circuit as the live?

 

[andy5096]

They are on the same one..

 

[ban-all-sheds]

That's OK then