800 ~1200 W. That is to say, the sum of all electrical appliances in a dormitory cannot be greater than1200 W. The power supply circuit of the school dormitory is designed and installed according to small demand and low power. There are many people living in student dormitories, and the maximum load that each dormitory can bear is more than 1200 watts (the design of each school is different), which can only meet the daily electricity consumption of lighting, water dispensers, computers and so on.