Why are there sockets in the corridor?

There are sockets in the corridor to meet the needs of indoor and outdoor, permanent and temporary electrical equipment. According to the relevant public information, in order to meet the needs of indoor and outdoor, permanent and temporary electrical equipment, it is necessary to set up sockets in the corridor. The sockets in the corridor can be used for cleaning, maintenance, testing, installation and use of ventilators, photography and other activities. There are also some special sockets, including emergency lighting sockets, fire extinguishing sockets, safety monitoring sockets and so on.