EX4M Flameproof three‐phase induction motors can be used as drivers in the locations where explosive gas exists. The motors are designed and manufactured into flameproof type and the flameproof properties conform to above standards. The marks of explosion protection are Exdb IIB T4 Gb, Extb IIIC T130°C Db or Exd IICT4 Gb, Extb IIIC T130°C Db.

The legible and durable raised sign “Ex” should be marked on the right top of nameplates and the distinct position of the enclosure of motors. The Ex mark is also stamped on the nameplate, which consists of mark, type of protection, explosion group and temperature class.