From the perspective of personal safety, any place that people can touch, should choose a socket with a protective door, such as living and office space;

In the case of electrical safety considerations, vulnerable, expensive or environmentally sensitive power applications require the selection of sockets with protective doors, such as computers, televisions, refrigerators, washing machines, range hoods, microwave ovens, etc.

From an environmental point of view, in a sensitive environment such as dust and oily smoke, it is necessary to select a socket with a protective door. Such as the kitchen or indoor or outdoor seating near the window.