JIS C 4620:2018

JIS C 4620:2018 specifies the cubicle type high voltage power receiving units (hereafter referred to as cubicles) not exceeding 4 000 kVA in the capacity of power receiving unit, intended for use by a consumer to receive the electrical power from the electricity utility. They are used in a circuit with a system short-circuit current not exceeding 12.5 kA at a nominal voltage 6.6 kV and at a frequency 50 Hz or 60 Hz.