... polycarbonate alloy , GRP 3.AC220V 4.ExedmbIICT4/DIPA20TA,T6 Explosion proof fluorescent fitting Type BYSApplication1.Used in Zone 1,Zone2, Zone20 ... ,IEC60079-0,IEC60079-1,IEC60079-7,IEC60079-18,IEC61241-1-1 2 Explosion protection:ExedmbIICT4/DIPA20TA,T6 3 Rated voltage ... in exclusive explosion proof electronic ballast.9 Built-in limit switch, de-energizing when open cover to assure the safe operation ...