Running wire threw kingspan from loft to socket

[t1gerwoods]

Running wire down kingspan Is it ok how i've done it?
I am running wire's from my loft down to the sitting room, i have 100mm of kingspan between joists and 25mm kingspan over the studs then plaster board, i am cut a 60mm inch wide channel kingspan right threw the 25mm kingspan and then duct taped it so wire's cant touch kingspan. then i put the plasterboard on after it,

I am only running the wire's, i am not conneting them

if this is not ok how can i do it??????

 

[PrenticeBoyofDerry]

Is the cable routed so in effect it is touching the plasterboard inner wall surface and not totally surrounded by insulation or is not touching the inner wall surface?
There is a different de-rating for each method.
If you can give detail of cable size (CSA) and rating of protective device (MCB/RCBO/Fuse) and the exact method it is installed.
I will guide you through the calculation and we can then say whether it is safe or not!