Check the fault of the electric device according to the existence and size of sparks. For example, when a spark is found between a normally fastened wire and a screw, it means that the wire head is loose or has poor contact. When the contacts of the electrical appliance are closed or disconnected, the circuit will flash, indicating that the circuit is connected. Action program: The action program of the electrical appliance should meet the requirements of the electrical instructions and drawings. If the electrical appliances on a certain circuit act too early, too late or do not act, it means that the circuit or electrical appliances are faulty.
In addition, it can also analyze and judge the fault according to the sound, temperature, pressure, odor, etc. emitted by the electrical appliance. Using the intuitive method, not only simple faults can be identified, but also more complex faults can be narrowed down to a smaller scope.
