This recommended practice contains system voltage nomenclature and the preferred voltage ratings of distribution apparatus and utilization equipment. This is essential for proper voltage identification throughout a power distribution system. The recommended practice also discusses the dynamic characteristics of the system and the proper principles of voltage control applied so that satisfactory voltages are supplied to utilization equipment under operating conditions. New IEEE Standard - Active - Draft. This recommended practice contains information concerning system voltage nomenclature and the preferred voltage ratings of distribution apparatus and utilization equipment. This is essential to proper voltage identification throughout a power distribution system. The recommended practice also discusses the dynamic characteristics of the system and the proper principles of voltage control applied so that satisfactory voltages will be supplied to utilization equipment under operating conditions. An understanding of system voltage nomenclature and the preferred voltage ratings of distribution apparatus and utilization equipment is essential to help ensure proper voltage identification throughout a power distribution system. The dynamic characteristics of the system need to be recognized and the proper principles of voltage control applied so that satisfactory voltages will be supplied to all utilization equipment under all normal conditions of operation.