A.500V檔,絕緣阻值大于5MΩ B.500V檔,絕緣阻值大于550MΩ C.1000V檔,絕緣阻值大于20MΩ D.1000V檔,絕緣阻值大于550MΩ
A.500V檔,絕緣阻值大于0.5MΩ B.500V檔,絕緣阻值大于5MΩ C.1000V檔,絕緣阻值大于0.5MΩ D.1000V檔,絕緣阻值大于20MΩ