I've got a set of elv halogen lights run inside a wall for a feature wall holes thingy, transformer type.
They used to be wired up to the ring(coz those were the first cables i came across) in 6mm(coz that was the only cable i had) but when we got re-wired recently, the sparks routed the cables differently and didnt reconnect the lights as they werent originals(coucil property).
now I'd like to take the feeds to these lights from one of the existing ceiling roses downstairs but i dont have a clue how to do it, if the downstairs light is switched that would mean no hot wire when the light is off, so no feed to the 12v ones right?
Theres another light close by that runs off a (3-way?) setup, 2 switches for one bulb. I understand that this should have an always on cable, though doesnt which wire is on depend on how the switches are switched?
I suppose my question is, where do i take the feed wire to the lightswitch for the 12v ones from? can it be from an existing ceiling rose or do i need to run a new feed from the CU? I want these lights to be switchable independantly from the other lights downstairs.
any help much appreciated.

atm they are switched from a lightswitch in the stud wall.
i ran a wire from the old ring to the switch in the wall then back up to the transformer,  taking the neutral direct from the ring. the wiring is still there so hopefully just need to move it from the old j-box i put in to a ceiling rose. does this help. The stud wall i built myself with the lights inside it. I dont know how the house lights are wired atm whether its t+e or not. theres no conduit in the house though so i can get into everything easily enough.

Hope this helps.

Earths ommited for clarity.

Hope your ceiling rose has the above terminals, middle terminal is constant live.

Its 'borrowing' in my book - He's taken it off the Ring for lighting purposes.

TT

Trician,
Sory - I was referring to Tellondon's post - I think you were looking at Billy's reply!

ok, the installation was from the ring before, i am changing it to the lighting circuit coz the cables i had connected to are dead now, so both live and neutral are gonna come from the ceiling rose. before all wires came off the ring connected with terminal blocks similar to the picture(omitting the ceiling rose and putting in a T+E instead) I told the spark who did the rewire how i'd done it, he said it wasnt too bad since i'd used 6mm.(mentioned something about 32amps or something with a strange look) Its all past tense now anyhow coz its changing
one thing i noticed was the switch has only 2 connection points, in and out, no L2. Should i get another kind of switch(even though thats not used.)? I know i am showing myself up here! but hey if you dont ask....
The lights are indeed run t+e so i'll be following the picture i guess....

Use 1mm/sq through out.

If you have an L2 at the switch, just leave it empty.

Copper is only good for scrap if you are prepared to strip it back, and this is only really viable in my eyes on 50mm/sq and above  

thanks very much everyone for your help, will crack on....

toothache is worse.
Dunno where the cat went, if seen post a picture of it, the stranger the better
Y'all had long enough to get to know what it looks like, so I dont want any fakes! lol