Correct and incorrect wiring of fluorescent lampsa

The correct wiring of inductive ballast fluorescent lamps is shown in Figure 2-1 (a). The phase wire must be connected to the switch side.
    Figure 2-1 (b) shows wrong wiring , because after turning off the switch
SA, the lamp is still powered, which may cause an electric shock accident if the lamp is inspected or cleaned . In addition, both ends of the fluorescent lamp will emit low light, which will affect the service life of the fluorescent lamp .
    In Figure 2-1, Cl is the reactive power compensation capacitor to improve the power factor, and sometimes it is not connected.