thinking of tracing for electrical conduit in concrete hollow blocks. bearing capacity?

[poppe12]

Hello,
I plan to create channels for electrical conduit in some walls.
It's the basement I'm converting into a laundry room.
I want several outlets above a countertop. The easiest solution would be to run a vertical channel up and then a horizontal channel, which all the outlets and boxes could fit into. Now I'm wondering if it's sensible from a load-bearing perspective? The walls are made of concrete blocks from the '50s, which I believe have most of their bearing capacity on the outer sides. The walls are load-bearing. The channel would be about 2 cm deep, plus the depth for the boxes.
I don't know what to patch it with but read somewhere that someone used husfix.
However, it should work with regular concrete mixed in a bucket, right?
What do you think?

 

[rävlyan]

Only trace to a depth of about 30 - 35mm to be able to plaster the trace afterwards, it doesn't affect the load-bearing capacity. The pipe/hose is secured in the trace with galvanized nails driven in at an angle like a cross over it, and the head as deep as possible without pinching the pipe/hose. Boxes can be chiseled or drilled in and secured with mortar.

 

[poppe12]

I have removed all the render and will apply new render. The old one was bad so I will go in 20-30mm into the clean concrete blocks. It will be deeper than if I had done it with the render still there. Does your recommendation still apply that it will hold and that I should refill with render?

 

[rävlyan]

Absolutely no problem with that, have done it many times in the profession.