What are the products safety certification ah?

Safety certification, the main electrical products, voltage below 1000V daily electrical products, in the European Union, then, there is a safety low voltage directive, this directive has a lot of standards below the standard contains products are required to do safety certification, usually a product to prevent and control the hazards of the seven major aspects, 1 electric shock 2 energy-related hazards 3 fire 4 heat-related hazards 5 mechanical Hazards6Radiation7Chemical,