... 3.Anti-misplug,resistance dropout and fire resistance. IP44 industrial plug&socket /multiple plug socketCharacteristics of the product1.Quality meet with certificate CE ,comply ... /T11919.2.They are mainly used in:steel smelting, petrochemical industrial ,electrical power,electric railroad, building ground ,airport&jetty,mine ... and sewage treatment works,hotel and so on . IP44 industrial plug& socket