IEEE revises nuclear power standard for class 1E cables

Organization also starts revisions for power supply standard

The IEEE recently approved the revision of IEEE 690, “Standard for the Design and Installation of Cable Systems for Class 1E Circuits in Nuclear Power Generating Stations.” The standard applies to the design and installation of safety-related electrical cable systems and associated circuits, as well as to non-safety-related cable systems that affect safety systems. IEEE updated references and requirements for fire protection, raceways, separation, cable performance requirements, and installation acceptance testing and documentation.

IEEE also began revisions on IEEE P765, “Preferred Power Supply (PPS) for Nuclear Power Generating Stations,” which will add guidelines for transmission system studies to verify the voltage adequacy of preferred power supplies in order to help ensure the design basis for PPS remains valid under all system conditions.