Why some switching power outlets are not grounded?

1, grounded or not is to see whether the appliance has a metal shell, if the switch is to control the refrigerator such a metal shell of the appliance, it must be grounded, so as to prevent leakage.

2, if the switch is connected to the lamp, such an appliance, will not be grounded, because it is unlikely that someone lit to touch it.

Switching power supply products are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communications equipment, power equipment, instruments, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, LCD monitors, LED lamps and lanterns, communications equipment, audio-visual products, security monitoring, LED light bags, computer cases, digital products and Instrument class and other fields.

Socket, pinyin chāzuò, also known as power socket, switch socket, English translation: receptacle sok. socket refers to one or more circuit wiring can be inserted into the seat, through which a variety of wiring can be inserted.