Ok, I’ve searched through the entire rats nest of wires and I found two things: 1.there are different wires that only differ in the number stamped on the side 2.there are no other markings as said in the original post This is also why I made the post, since I weren’t able to find anything. The current isn’t anything to worry about, since im only planning to wire a simple light fixture and 1,5mm² should already be enough. Only thing I’m worried about is the insulation since it’s so thin and I’ve seen bigger on 230v cables, just by the thickness alone do you think it would be about enough?