I have Siberian spruce wood siding on my house. Is it possible to run electrical wiring from the outside?
Is there no way to run it under the facade? No ventilated clearance?
I would run the wire through the gap from above or below. My opinion is that properly sized wire in insulation is safe enough, but you could stick it in a metal pipe, that would be for sure. Where you need to lead outside the facade, cut holes in advance.