Sub-plugs, sockets and connectors. Plugs and sockets are generally divided into two-pole plugs and two-pole grounding plugs.

The current passes through, so I would like to tell you here that as long as any electrical appliance is not in use, it must be unplugged to save electricity.

For power products, there are usually four nouns: 1. Plug. Refers to the part that is connected to the power cord and has a male plug. The full name should be called a plug connector. For two-pin flat plugs, English is sometimes spelled duckhead (duck head, whichever is the image). 2. Connector.
   
Refers to the part that is connected to the power cord and has a female socket socket. 3. Appliance input socket (inlet). Its state is similar to 1, but it is installed on a fixed body such as an electrical appliance and is not connected, including the one installed on the socket body. 4, socket (socket). Its status is similar to 2, but the installation location is the same as 3. The full name should be called Appliance Socket.

We often confuse 2 and 3 in these four words. We often call those with pins as plugs and those with holes as sockets, but they are actually different.