Is it dangerous to have these electrical cables on top of shower?
Assuming:


The cables themselves have one or more layers of unbroken, waterproof insulation.
The orange conduit is itself unbroken.
The orange conduit will be covered with a surface impermeable to water and steam before any water is present.



  Is it dangerous to have these electrical cables on top of shower?


No.  It is not the slightest bit dangerous.

Aesthetically and functionally it would be nicer to have the wires, and that beam, out of the way to have a more open shower.  But the electrical safety is not a problem at all.