根据IEC出版物364—3对于电气环境的规定:按建筑型式分类,高层建筑属于CB_2类火灾蔓延环境;从雷击程度分类,高层建筑耸立于高空,属于AQ_3类直击雷危险环境;按紧急疏散条件分类,一般住宅和办公用的高层建筑,人员聚集密度低,疏散困难,属BD_2类环境;向公众开放的高层建筑,如旅馆、医院,人员聚集密度高,疏散困难,属BD_4 According to the IEC publication 364-3 on the electrical environment: classification according to the type of construction, high-rise buildings belong to the CB_2 fire spread environment; classification from the degree of lightning, high-rise buildings stand at high altitude, belonging to the AQ_3 direct lightning hazardous environment; according to emergency evacuation conditions Classification, general residential and office high-rise buildings, low density of people, difficulty in evacuation, BD_2 environment; high-rise buildings open to the public, such as hotels, hospitals, high density of people, evacuation difficulties, is BD_4