Low-voltage and high-voltage wires are not separated for interference but for safety. OPs point is that if a 230V wire somehow got damaged it could end up touc

Low-voltage and high-voltage wires are not separated for interference but for safety. OPs point is that if a 230V wire somehow got damaged it could end up touching the outside of an Ethernet cable, and if the Ethernet cable is not rated for that it could cause serious damage to the attached equipment. You either need to keep Ethernet away from power, or make power 230V+-tolerant.