[en] SEAMATE-II(Simulated Environmental Apparatus for Material Testing-II) has been constructed in August, 1979 at Takasaki Radiation Chemistry Research Establishment, which is working quite well during one and half a year until now. Development of SEAMATE-II was planned at earlier period of 1976, and the apparatus was designed and built in the fiscal year of 1978. Meanwhile, SEAMATE-I was used to solve the problems for constructing SEAMATE-II. During the time the qualification test condition, guide or standard for electrical equipment used in nuclear power station has been investigated extensively from data published in and out of Japan. This report is a summary and an interpretation of qualification test conditions, testing methods, guides or standards for the electrical equipments used in light water reactors, and also data related to them. Items for the interpretation are selected from those of IEC(International Electrotechnical Commission) investigation. (author)