Fixed indoor installation and temporary outdoor installation; used for the transmission of video signals in high-definition analog video surveillance systems (HD) video surveillance systems. Installation alongside Category 1 cables marked either 450/750 V or 0.6/1 kV is permitted, with a nominal voltage to ground (Uo) of up to 400 V, in accordance with the UNEL 36762 standard. Installation in underground cable ducts is not permitted. The Eca CPR classification also allows for use in environments with a higher fire risk (LOW risk)