Dowels and screws for KS hollow block with attached insulation

Hello everyone,

I am in the process of installing electrical wiring in an interior wall of my garage.

The problem is:

the wall is KS hollow block, with 4 to 5 cm Styrodur panels on it, all plastered over.

I somehow can't manage to find the right anchors and screws to mount cable ducts and sockets. I keep hitting the hollow space of the KS.

Do you have any ideas?

Regards, Zippler

In case of emergency, I would use Kippdübel.

Hollow wall anchor? I might possibly glue the cable ducts. Of course, screw the sockets if they are surface-mounted. Otherwise, with such things, you can also inject foam into the drill hole and then glue in a wooden dowel rod.