Plug power cord equipment maintenance
At present, the length of the plug power cord on the projectors on the market is generally about 2 meters. In the classroom, the power cord is not long enough from the projector to the wall outlet. Some of them are long enough to deal with the messenger, often disconnected or unplugged, which is very inconvenient and unsafe. Therefore, teachers need to add a power cord with a multi-purpose socket and plug when taking an audio-visual teaching class. Generally, the length of the cord should be about 3m. Only in this way, the power cord is routed from the socket on the wall of the classroom through the ground, avoiding the activity area of teachers and students, which is more convenient and safe. Once an accident occurs, it can be eliminated in time.
However, quite a few schools have projectors without power cords, and it is wrong to use the power cord on the projector directly. The idea of safety first should be established, and the equipment accessories should be matched as soon as possible. Some schools, therefore, extend the power cord on the projector, and the method of reassembly is also advisable. In addition, regarding the hand plug, the projector is generally a three-pin plug, while the classroom wall is a fixed two-pin socket. It cannot be used without matching, or it is wrong and unsafe to use immediately. There is also a phenomenon that some female teachers are afraid of electricity and do not dare to grasp the plug with their hands to install, but pull the power cord of the plug with their hands, which often causes the wire to be broken or the plug becomes loose, which affects the use.
Some teachers do not pay attention to checking the plugs and sockets for faults before use. When they are used, they are caught by faults, thus affecting the progress of electrification teaching. Therefore, schools should be equipped with accessories for audio-visual equipment to create good conditions for use. At the same time, it is necessary to improve the operational skills of teachers through training.
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