I tried this for 3 lights and I have come to the conclusion that this house had a ****ty electrician. Even the hulk wouldnt be able to pull any of the wires thorugh the conduit. Fishtape cant go though, all dead corner, figure of eights, who know.
My only solution appears be the unused ground wire to each light. If i taped each one of them black could it become a magic neutral? Allowed legally?
try my method:
first take 1 existing old wire - unscrew it from the electrical wall switch
use tape to secure some heavy duty weed eater nylon gut to it (2.5mm - 3mm)
now pull old wire back up into the roof with the nylon gut tied to it
tape the new neutral wire to the old wire & nylon gut, rub some oil or Q20 on it first before pulling all 3 back down through the conduit again.
I ended up wiring my own braairoom cause all the electricians I hired refused to waste time pulling wire through my "in the wall conduits" they all said I was mad to use conduit - should have just cemented in twin & earth! the one wanted R3k for the job said it would take him all day!
In the end I did myself - all it took was some parcel string / weed eater gut and a vacuum cleaner. sucked the string through the conduit with the vacuum cleaner - tied weed eater gut to the string - pulled gut through -then tied 3 wires to gut - sprayed with Q20 and pulled that through.
took less than 1hrs to complete all the wall plugs & light switches!!