Since there is a switch, you have to find out the wires in your dormitory. After you remove it, go through the switch and connect it, and you can turn off the power.
I'll give you a few more ways.
Pay attention to the places where there is electricity all the time in the dormitory, such as toilets, exhaust fans and corridor lights. When wiring from these places, there is no restriction on electricity consumption. At that time, we connected the line from the exhaust fan of the toilet, but it was easy to find it only at night and during the day.
In addition, the system of these schools is to ensure your life safety and physical and mental health, or it is better to observe more.
If conditions permit, it is always better to go out and rent a house.