What Are The Situations Where Wall Switches Are Installed Improperly?

Wall Switch refers to an electrical switch installed on the wall, which is mostly used to connect and disconnect circuits and control lighting switches. When we are decorating, we should all know how to install wall switches. So what are the situations in which wall switches are improperly installed?

There are generally four situations in which wall switches are improperly installed:
1. Two wires are connected to one pile head;
2. The zero and phase wires are connected incorrectly;
3. The working voltage and working current do not match the socket power, and it is overloaded for a long time;
4. The switch is installed on a flammable object, the wire core is exposed outside or water vapor penetrates, causing a short circuit, so switches and sockets in the bathroom must be equipped with waterproof boxes.