摘要
There are many factors that affect the safety of home appliance, of which the difference in building units may produce relatively considerable influence over the safety of home appliance. The building in Europe is basically used by a single family, and normally has two floors. It is easy to maintain its ground wire. As China has a large population, its residential buildings generally have more than six floors. While its ground wire is shared by more than ten families, the ground wire is more likely to be damaged. At the same time, lots of electrical appliances are all connected to the shared ground wire, it is more dangerous than it is in Europe.
