1.Used in Zone1,Zone2 2.Ex-mark:ExedIICT6 3.Type:16A,32A,63A 4.Poles:1P+N+PE ... 2, Designed for IIA,IIB,IIC groups explosive atmosphere. 3, Designed for the environment with T1~T6 temperature class 4 ... be draw out only after switch cut off inside socket.3,Socket designed with padlock, if out of operation , ... Standard :GB 3836.1,GB 3836.2,GB 3836.3,IEC60079-0,IEC60079-1,IEC60079-7ZXF8575-16 Selection Table ...