IEC 60794-4-30:2021 specifies the optical fibre, cable elements, cable construction requirements, main requirements for installation and operating conditions, cable design characteristics and test for OPPC (optical phase conductor), used for carrying current as well as. IEC 60794-4-30:2021 specifies the optical fibre, cable elements, cable construction requirements, main requirements for installation and operating conditions, cable design characteristics and test for OPPC (optical phase conductor), used for carrying current as well as. The installation of OPGW/OPPC with incorporated optical fibers is subject to the accident prevention regulations that pertain generally in the country involved and to the general rules for laying cables as defined in DIN 48 207 and EN 50182, Appendix E or ANSI/IEEE Standard 524- 1980. This Bulletin. wer transmission systems. OPPC cables are primarily used in voltage levels below 110kV, such as suburban distribution netwo ks and rural. worldwide quality standards. Prysmian has a built-in multi-step quality assurance programme, which covers the entire production process from cable design and raw materials purchasing, to final inspecti tion for any single project. Preparations before the construction of OPPC 1.