IEEE 308-2001

This standard applies to the Class 1E portions of the following systems and equipment in single-unit and multiunit nuclear power generating stations: -- Alternating current power systems -- Direct current power systems -- Instrumentation and control (I&C) power systems These systems include the items listed in Table 1. This standard does not apply to the preferred power supply; the unit generators and their buses; generator breaker; step-up, auxiliary, and start-up transformers; connections to the station switchyard; switchyard; transmission lines; and the transmission network (see Figure 1).