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The socket is not safe without a fuse.

The function of the fuse is: when the circuit fails or is abnormal, the current is constantly increasing, and the increased current may damage some important or valuable components in the circuit, and it may also burn the circuit and even cause a fire. If the fuse is correctly placed in the circuit, the fuse will fuse itself to cut off the current when the current abnormally rises to a certain height and a certain time, thereby protecting the safe operation of the circuit.